ETSI EN 301 843-1 V2.3.1 (2026-03)

ElectroMagnetic Compatibility (EMC) standard for marine radio equipment and services; Part 1: Common technical requirements

REN/ERM-EMC-413

Standard elektromagnetne združljivosti (EMC) za pomorsko radijsko opremo in storitve - 1. del: Splošne tehnične zahteve

General Information

• Status: Not Published
• Technical Committee: ERM WGEMC - ERM Electromagnetic Compatibility
• Current Stage: 12 - Citation in the OJ (auto-insert)
• Due Date: 01-Apr-2026
• Completion Date: 30-Mar-2026
• Ref Project: SIST EN 301 843-1 V2.3.1:2026 - ElectroMagnetic Compatibility (EMC) standard for marine radio equipment and services - Part 1: Common technical requirements

Standards Content (Sample)

Draft ETSI EN 301 843-1 V2.3.0 (2025-12)

EUROPEAN STANDARD
ElectroMagnetic Compatibility (EMC) standard
for marine radio equipment and services;
Part 1: Common technical requirements

2 Draft ETSI EN 301 843-1 V2.3.0 (2025-12)

Reference
REN/ERM-EMC-413
Keywords
EMC, maritime, radio, regulation
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ETSI
3 Draft ETSI EN 301 843-1 V2.3.0 (2025-12)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 6
Introduction . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 8
3 Definition of terms, symbols and abbreviations . 9
3.1 Terms . 9
3.2 Symbols . 10
3.3 Abbreviations . 10
4 General and operational requirements . 11
4.1 Environmental profile . 11
4.2 Arrangements for test signals . 11
4.2.0 General . 11
4.2.1 Arrangements for test signals at the input of transmitters . 12
4.2.2 Arrangements for test signals at the output of transmitters . 12
4.2.3 Arrangements for test signals at the input of receivers . 12
4.2.4 Arrangements for test signals at the output of receivers . 12
4.2.5 Arrangements for testing transmitter and receiver together (as a system) . 12
4.3 RF exclusion band of radio communications equipment. 13
4.4 Intermediate frequency responses of receivers or receivers which are part of transceivers . 13
4.5 Void . 14
5 Performance assessment . 14
5.1 General . 14
5.2 Equipment which can provide a continuous communication link . 14
5.3 Equipment which does not provide a continuous communication link . 14
5.4 Ancillary equipment . 15
5.5 Equipment classification . 15
6 Performance criteria . 15
6.0 General requirements . 15
6.1 Performance criteria A for continuous phenomena applied to transmitters and receivers. 16
6.2 Performance criteria B for transient phenomena applied to transmitters and receivers . 16
6.3 Performance criteria C applied to power supply failure . 16
6.4 Void . 16
6.5 Performance criteria for equipment which does not provide a continuous communication link . 16
6.6 Performance criteria for ancillary equipment tested on a stand alone basis . 17
7 Applicability . 17
8 Testing for compliance with technical requirements . 17
8.1 Test configuration. 17
8.2 Enclosure emissions . 18
8.2.0 Applicability . 18
8.2.1 Test description . 18
8.2.2 Test method . 18
8.2.3 Limits . 19
8.3 DC power input/output ports . 20
8.3.0 Applicability . 20
8.3.1 Test description . 20
8.3.2 Test method . 20
8.3.3 Limits . 21
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4 Draft ETSI EN 301 843-1 V2.3.0 (2025-12)
8.4 AC mains power input/output ports . 21
8.4.0 Applicability . 21
8.4.1 Test description . 21
8.4.2 Test method . 21
8.4.3 Limits . 22
9 Test methods and levels for immunity tests . 23
9.0 General . 23
9.1 Test configuration. 23
9.2 Radio frequency electromagnetic field (80 MHz to 6 GHz) . 23
9.2.0 Applicability . 23
9.2.1 Test description . 23
9.2.2 Test method . 23
9.2.3 Performance criteria . 24
9.3 Electrostatic discharge . 24
9.3.0 Applicability . 24
9.3.1 Test description . 24
9.3.2 Test method . 24
9.3.3 Performance criteria . 24
9.4 Fast transients, differential and common mode . 25
9.4.0 Applicability . 25
9.4.1 Test description . 25
9.4.2 Test method . 25
9.4.3 Performance criteria . 25
9.5 Radio frequency, common mode . 25
9.5.0 Applicability . 25
9.5.1 Test description . 26
9.5.2 Test method . 26
9.5.3 Performance criteria . 26
9.6 Power supply variations . 26
9.6.0 Applicability . 26
9.6.1 Power supply short term variations . 27
9.6.1.1 Test description . 27
9.6.1.2 Test method . 27
9.6.1.3 Performance criteria . 27
9.6.2 Power supply failure . 27
9.6.2.1 Test description . 27
9.6.2.2 Test method . 27
9.6.2.3 Performance criteria . 27
9.7 Surges . 28
9.7.0 Applicability . 28
9.7.1 Test description . 28
9.7.2 Test method . 28
9.7.3 Performance criteria . 28
Annex A (informative): Guidance on setting the dwell time for radiated immunity testing . 29
A.1 Overview . 29
A.2 Example of EUT containing a GNSS receiver . 29
Annex B (informative): Bibliography . 30
Annex C (informative): Change history . 31
History . 32

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5 Draft ETSI EN 301 843-1 V2.3.0 (2025-12)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
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Foreword
This draft European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility
and Radio spectrum Matters (ERM), and is now submitted for the combined Public Enquiry and Vote phase of the ETSI
EN Approval Procedure (ENAP).
The present document is part 1 of a multi-part deliverable covering the ElectroMagnetic Compatibility (EMC) standard
for marine radio equipment and services, as identified below:
Part 1: "Common technical requirements";
Part 2: "Specific conditions for VHF radiotelephone transmitters and receivers operating in the frequency range
156 MHz to 174 MHz";
Part 3: "Specific conditions for non-SOLAS maritime radars and river radars";
Part 4: "Specific conditions for Narrow-Band Direct-Printing (NBDP) NAVTEX receivers";
Part 5: "Specific conditions for MF/HF radiotelephone transmitters and receivers";
Part 6: "Specific conditions for Earth Stations on board Vessels operating in frequency bands above 3 GHz";
Part 7: "Specific conditions for Maritime Broadband Radiolink equipment";
Part 8: "Specific conditions for radio beacons and locating devices".
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6 Draft ETSI EN 301 843-1 V2.3.0 (2025-12)
Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 18 months after doa

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The present document contains a full list of EMC requirements together with the standard test set-ups and compliance
limits, that should be used by the product specific parts within the ETSI EN 301 843 series [i.9]. Deviations, where
applicable, from this are set out in the specific product related part.
Product dependent arrangements necessary to perform the EMC tests on dedicated types of radio equipment, and the
assessment of test results, are detailed in the appropriate relevant radio technology parts of ETSI EN 301 843 series [i.9]
details of which can be found in the foreword of the present document.
The present document also acts as the basis for product specific parts of the ETSI EN 301 843 series [i.9]. It is these
product specific parts that are intended to be cited in the OJEU under article 3.1(b) of Directive 2014/53/EU [i.8].

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7 Draft ETSI EN 301 843-1 V2.3.0 (2025-12)
1 Scope
The present document contains the common requirements for marine radio communications and radio determination
equipment and associated ancillary equipment operating from any combination of internal batteries, DC and single
phase AC, in respect of ElectroMagnetic Compatibility (EMC).
The provisions of the present document apply to marine radio equipment not covered in the scope of the Council
Directive on marine equipment (the "Marine Equipment Directive" 2014/90/EU [i.4]).
Product dependent arrangements necessary to perform the EMC tests on dedicated types of marine radio
communications and radio determination equipment, and the assessment of test results, are detailed in the appropriate
product related parts of the present document.
The present document, together with the product related part, specifies the applicable EMC tests, the methods of
measurement, the limits and the performance criteria for marine radio equipment and associated ancillary equipment.
In case of differences (for instance concerning special conditions, definitions, abbreviation) between the present
document and the relevant product related part of the present document, the product related part takes precedence.
For the further content of the present document, the expression "radio equipment" is taken to mean marine radio
communications or radio determination equipment, in each individual case.
Technical specifications related to the antenna port of radio equipment and emissions from the enclosure port of radio
equipment and combinations of radio and associated ancillary equipment are not included in the present document.
Such technical specifications are normally found in the relevant product standards for the effective use of the radio
spectrum.
The environment classification used in the present document is maritime, as defined in EN IEC 60945 [i.3].
Marine radio communications equipment meeting the EMC requirements set out in EN IEC 61000-6-3 [i.1] and
EN 61000-6-1 [i.2] is deemed to meet also the EMC requirements for the maritime environment described in
EN IEC 60945 [i.3].
The EMC requirements have been selected to ensure an adequate level of compatibility for apparatus intended to be
used in the maritime environment. The levels, however, do not cover extreme cases which may occur in any location
but with low probability of occurrence.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found in the
ETSI docbox.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents are necessary for the application of the present document.
[1] EN IEC 55016-1-4:2019: "Specification for radio disturbance and immunity measuring apparatus
and methods – Part 1-4: Radio disturbance and immunity measuring apparatus – Antennas and test
sites for radiated disturbance measurements", (produced by CENELEC).
[2] EN IEC 55016-1-1:2019: "Specification for radio disturbance and immunity measuring apparatus
and methods - Part 1-1: Radio disturbance and immunity measuring apparatus - Measuring
apparatus", (produced by CENELEC).
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8 Draft ETSI EN 301 843-1 V2.3.0 (2025-12)
[3] EN 61000-4-2:2009: "Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement
techniques - Electrostatic discharge immunity test", (produced by CENELEC).
[4] EN IEC 61000-4-3:2020: "Electromagnetic compatibility (EMC) - Part 4-3: Testing and
measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test",
(produced by CENELEC).
[5] EN 61000-4-4:2012: "Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst immunity test", (produced by CENELEC).
[6] EN 61000-4-5:2014 +A1:2017: "Electromagnetic compatibility (EMC) - Part 4-5: Testing and
measurement techniques - Surge immunity test", (produced by CENELEC).
[7] EN 61000-4-6:2014: "Electromagnetic compatibility (EMC) - Part 4-6: Testing and measurement
techniques - Immunity to conducted disturbances, induced by radio-frequency fields", (produced
by CENELEC).
[8] EN IEC 61000-4-11:2020: "Electromagnetic compatibility (EMC) –Part 4-11: Testing and
measurement techniques – Voltage dips, short interruptions and voltage variations immunity tests
for equipment with input current up to 16 A per phase", (produced by CENELEC).
[9] EN 55016-2-3:2017/A1:2019: "Specification for radio disturbance and immunity measuring
apparatus and methods - Part 2-3: Methods of measurement of disturbances and immunity -
Radiated disturbance measurements", (produced by CENELEC).
[10] EN 55016-2-1:2014+A1:2017: "Specification for radio disturbance and immunity measuring
apparatus and methods - Part 2-1: Methods of measurement of disturbances and immunity -
Conducted disturbance measurements", (produced by CENELEC).
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents may be useful in implementing an ETSI deliverable or add to the reader's
understanding, but are not required for conformance to the present document.
[i.1] EN IEC 61000-6-3 (2021): "Electromagnetic compatibility (EMC) - Part 6-3: Generic standards -
Emission standard for residential, commercial and light-industrial environments", (produced by
CENELEC).
[i.2] EN 61000-6-1 (2019): "Electromagnetic compatibility (EMC) - Part 6-1: Generic standards -
Immunity for residential, commercial and light-industrial environments", (produced by
CENELEC).
[i.3] EN 60945 (2002) + Corrigendum 1 (2008): "Maritime navigation and radiocommunication
equipment and systems - General requirements - Methods of testing and required test results",
(produced by CENELEC).
[i.4] Directive 2014/90/EU of the European Parliament and of the Council of 23 July 2014 on marine
equipment and repealing Council Directive 96/98/EC.
[i.5] IEC 60050-161 (1990): "International Electrotechnical Vocabulary. Chapter 161: Electromagnetic
compatibility".
[i.6] CEPT/ERC Recommendation 74-01 (2021): "Unwanted emissions in the spurious domain".
[i.7] IMO Convention: "International Convention for the Safety of Life at Sea (SOLAS)".
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[i.8] Directive 2014/53/EU of the European Parliament and of the council of 16 April 2014 on the
harmonisation of the laws of the Member States relating to the making available on the market of
radio equipment and repealing Directive 1999/5/EC.
[i.9] ETSI EN 301 489 series: "ElectroMagnetic Compatibility (EMC) standard for marine radio
equipment and services".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the terms given in article 2 of Directive 2014/53/EU [i.8] and the following
apply:
ancillary equipment: equipment (apparatus), used in connection with a receiver, transmitter or transceiver is
considered as an ancillary equipment (apparatus) if:
• the equipment is intended for use in conjunction with a receiver or transmitter to provide additional operational
and/or control features to the radio equipment, (e.g. to extend control to another position or location); and
• the equipment cannot be used on a stand alone basis to provide user functions independently of a receiver or
transmitter; and
• the receiver or transmitter to which it is connected, is capable of providing some intended operation such as
transmitting and/or receiving without the ancillary equipment (i.e. it is not a sub-unit of the main equipment
essential to the main equipment basic functions)
artificial antenna: non-reactive, non-radiating dummy load equal to the nominal impedance of the antenna port
NOTE: For the purpose of EMC tests, the antenna port(s) of the Equipment Under Test (EUT) are terminated
with a non-radiating 50 Ω termination (artificial antenna) unless there is a requirement to apply a Radio
Frequency (RF) input signal to the receiver antenna port.
Artificial Mains Network (AMN): network used to supply the mains voltage (AC or DC) and current to the
Equipment Under Test (EUT)
continuous phenomena (continuous disturbance): electromagnetic disturbance, the effects of which on a particular
device or equipment cannot be resolved into a succession of distinct effects
NOTE: See IEC 60050-161 [i.5].
critical stored data: data that is essential for an EUT to perform a primary function in accordance with that EUT's
specifications.
enclosure port: physical boundary of the apparatus through which electromagnetic fields may radiate or impinge
NOTE: In the case of integral antenna equipment, this port is inseparable from the antenna port.
integral antenna: antenna designed to be connected directly to the equipment with or without the use of an external
connector and considered to be part of the equipment
NOTE: An integral antenna may be fitted internally or externally to the equipment. An antenna which may not be
removed during the tests, according to the manufacturer's statement.
mobile equipment: marine receiver, transmitter or transmitter/receiver (transceiver) intended for installation and use
onboard ships
operating frequency range: range(s) of radio frequencies covered by the Equipment Under Test (EUT) without any
change of units
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10 Draft ETSI EN 301 843-1 V2.3.0 (2025-12)
port: particular interface, of the specified equipment (apparatus), with the electromagnetic environment
NOTE: For example, any connection point on an equipment intended for connection of cables to or from that
equipment is considered as a port (see Figure 1).
Enclosure port
Antenna port
AC power port
Signal/control port
DC power port
APPARATUS
Telecommunication port
Earth port
Figure 1: Examples of ports
portable equipment: marine radio and/or ancillary equipment intended for portable (e.g. handheld) operation onboard
ships, and powered by its own integral battery
radio communications equipment: radio equipment which includes one or more radio transmitters and/or receivers
and/or parts thereof for use in a mobile or portable application onboard ships
radio determination equipment: radio equipment able to determine the position, velocity and/or other characteristics
of an object, or the obtaining of information relating to these parameters, by means of the propagation properties of
radio waves.
NOTE: This includes navigation radars
radio equipment: "An electrical or electronic product, which intentionally emits and/or receives radio waves for the
purpose of radio communication and/or radio determination, or an electrical or electronic product which must be
completed with an accessory, such as antenna, so as to intentionally emit and/or receive radio waves for the purpose of
radio communication and/or radio determination", definition from Directive 2014/53/EU [i.8].
NOTE: Radio equipment can be operated with ancillary equipment but if so, is not dependent on it for basic
functionality.
removable antenna: antenna which may be removed for the test according to the manufacturer statement
spurious emission: emission on a frequency, or frequencies, which are outside the necessary bandwidth and the level of
which may be reduced without affecting the corresponding transmission of information
NOTE: Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and
frequency conversion products but exclude out of band emissions
(CEPT/ERC Recommendation 74-01 [i.6]).
transient phenomena (transient disturbance): pertaining to or designating a phenomena or a quantity which varies
between two consecutive steady states during a time interval short compared with the time-scale of interest
NOTE: See IEC 60050-161 [i.5].
worst case: configuration and arrangement of the EUT, ancillary equipment and connecting cables that produces the
worst emissions or the lowest immunity during testing
3.2 Symbols
For the purposes of the present document, the following symbols apply:
Bn Necessary bandwidth of an emission
PX Maximum PEP
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AC Alternating Current
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11 Draft ETSI EN 301 843-1 V2.3.0 (2025-12)
AM Amplitude Modulation
AMN Artificial Mains Network
B measurement Bandwidth
DC Direct Current
EM ElectroMagnetic
EMC ElectroMagnetic Compatibility
EUT Equipment Under Test
FSOATS Free Space Open Area Test Site
IEC International Electrotechnical Commission
IMO International Maritime Organization
MF/HF Medium Frequency/High Frequency
NAVTEX Navigational Telex
NBDP Narrow Band Direct Printing
RF Radio Frequency
SAC Semi-Anechoic Chamber
VHF Very High Frequency
4 General and operational requirements
4.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be in accordance with its intended use, but as a minimum, shall be that specified in the test
conditions contained in the present document. The equipment shall comply with all the technical requirements of the
present document at all times when operating within the boundary limits of the operational environmental profile
defined by its intended use.
The equipment shall be tested under normal test conditions according to the relevant product and basic standards or to
the information accompanying the equipment.
The test shall be carried out at a point within the specified normal operating environmental range of temperature and
humidity with the equipment connected to the intended power supply voltage. The normal temperature and humidity
conditions shall be a combination of temperature and humidity within the following ranges:
• temperature: +15 °C to +35 °C
• relative humidity: 25 % to 75 %
The test voltage for equipment to be connected to the AC mains, shall be the nominal (rated) mains voltage. The
frequency of the test voltage shall be 50 Hz and its offset shall not exceed 1 Hz.
The test voltage for equipment to be connected to a battery, shall be the nominal voltage of the battery as specified in
the user documentation.
The test conditions, configuration, and mode of operation shall represent the intended use and shall be recorded.
For emission and immunity tests, specific product type related information on the test modulation, test conditions and
tests arrangements, etc., are found in the part of the present document dealing with the particular type of radio
equipment.
4.2 Arrangements for test signals
4.2.0 General
Standalone receivers and transmitters shall be tested separately. Transceivers shall be tested so that operation in each
direction is confirmed.
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12 Draft ETSI EN 301 843-1 V2.3.0 (2025-12)
4.2.1 Arrangements for test signals at the input of transmitters
The signal source providing the transmitter under test with the modulation signal for the normal test modulation shall be
located outside the test environment, unless the transmitter is modulated by its own internal source.
4.2.2 Arrangements for test signals at the output of transmitters
The measuring and monitoring equipment for the wanted RF output signal from the transmitter under test shall be
located outside the test environment.
For transmitters with an integral antenna, the wanted RF output signal to establish a communication link shall be
delivered from the EUT to an antenna located within the test environment. This antenna shall be connected to the
external equipment by a coaxial cable.
For transmitters with a removable antenna, the wanted RF output signal to establish a communication link shall be
delivered from the antenna connector to the external equipment by a shielded transmission line, such as a coaxial cable.
The level of the wanted RF output signal in transmit mode of operation shall be set to the maximum rated RF power for
the EUT.
4.2.3 Arrangements for test signals at the input of receivers
The signal source providing the receiver under test with the wanted RF input signal shall be located outside the test
environment.
For receivers with an integral antenna, the wanted RF input signal to establish a communication link shall be presented
to the EUT from an antenna located within the test environment. This antenna shall be connected to the external RF
signal source by a coaxial cable.
For receivers with a removable antenna, the wanted RF input signal to establish a communication link shall be
presented to the antenna connector of the EUT by a shielded transmission line, such as e.g. a coaxial cable. The
transmission line shall be connected to the external RF signal source.
The level of the wanted RF input signal is expected to represent a signal level and is intended to avoid the broadband
noise from the power amplifiers generating the EM disturbance from influencing the measurement.
4.2.4 Arrangements for test signals at the output of receivers
The measuring and monitoring equipment for the output signal from the receiver under test shall be located outside the
test environment.
If the receiver has an output connector or port providing the wanted baseband output signal, then this port should be
used in a manner consistent with its intended use.
For receivers without an output connector, thus providing a visual or acoustic indicating of the received signal, this
output should be coupled via an electrically non-conductive means to the external equipment.
For receivers with an analogue speech output the audio output from the acoustic transducer, this output should be
coupled via an electrically non-conductive acoustic tube to an external audio distortion meter or other measuring
equipment as required.
Precautions will need to be taken to ensure that any effect on the test due to the coupling means is minimized.
4.2.5 Arrangements for testing transmitter and receiver together
(as a system)
Transmitters and receivers may be tested for immunity as a system when combined as a transceiver or the combined
equipment is of a size which allows simultaneous testing. In this case the transceiver or transmitter and receiver shall be
located inside the test environment and shall be exposed simultaneously to the immunity test signals.
The test modulation shall be transmitted by the test system and looped back in the EUT. Further, the output of the EUT
shall be monitored by the test system.
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13 Draft ETSI EN 301 843-1 V2.3.0 (2025-12)
4.3 RF exclusion band of radio communications equipment
For the purpose of EMC tests set up in the present document, the radio communications or radio determination
equipment is subject to an exclusion band.
The RF exclusion band shall apply to radio communications and determination equipment intended for operation at
designated frequencies up to 6 GHz.
Particular care is required for radio equipment intended for operation at designated frequencies less than or equal to
30 MHz. Under these circumstances the RF exclusion band shall apply to EMC emission measurements and immunity
tests for conducted disturbances at AC mains and/or DC power ports which are performed in the frequency range up to
30 MHz.
The following provisions shall apply to all types of radio equipment:
• transmitters and transceivers:
- the RF exclusion band applies to EMC emission measurements in transmit mode of operation, and to
immunity tests. For equipment in stand-by mode, the exclusion band for transmitters shall not apply to
EMC emission measurements;
• receivers:
- the RF exclusion band applies to immunity tests only;
• ancillary equipment:
- for ancillary equipment intended to be
...

EUROPEAN STANDARD
ElectroMagnetic Compatibility (EMC) standard
for marine radio equipment and services;
Part 1: Common technical requirements

2 ETSI EN 301 843-1 V2.3.1 (2026-03)

Reference
REN/ERM-EMC-413
Keywords
EMC, maritime, radio, regulation
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ETSI
3 ETSI EN 301 843-1 V2.3.1 (2026-03)
Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 6
Introduction . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 8
3 Definition of terms, symbols and abbreviations . 9
3.1 Terms . 9
3.2 Symbols . 10
3.3 Abbreviations . 10
4 General and operational requirements . 11
4.1 Environmental profile . 11
4.2 Arrangements for test signals . 11
4.2.0 General . 11
4.2.1 Arrangements for test signals at the input of transmitters . 11
4.2.2 Arrangements for test signals at the output of transmitters . 12
4.2.3 Arrangements for test signals at the input of receivers . 12
4.2.4 Arrangements for test signals at the output of receivers . 12
4.2.5 Arrangements for testing transmitter and receiver together (as a system) . 12
4.3 RF exclusion band of radio communications equipment. 12
4.4 Intermediate frequency responses of receivers or receivers which are part of transceivers . 13
4.5 Void . 14
5 Performance assessment . 14
5.1 General . 14
5.2 Equipment which can provide a continuous communication link . 14
5.3 Equipment which does not provide a continuous communication link . 14
5.4 Ancillary equipment . 15
5.5 Equipment classification . 15
6 Performance criteria . 15
6.0 General requirements . 15
6.1 Performance criteria A for continuous phenomena applied to transmitters and receivers. 16
6.2 Performance criteria B for transient phenomena applied to transmitters and receivers . 16
6.3 Performance criteria C applied to power supply failure . 16
6.4 Void . 16
6.5 Performance criteria for equipment which does not provide a continuous communication link . 16
6.6 Performance criteria for ancillary equipment tested on a stand alone basis . 17
7 Applicability . 17
8 Testing for compliance with technical requirements . 17
8.1 Test configuration. 17
8.2 Enclosure emissions . 18
8.2.0 Applicability . 18
8.2.1 Test description . 18
8.2.2 Test method . 18
8.2.3 Limits . 19
8.3 DC power input/output ports . 20
8.3.0 Applicability . 20
8.3.1 Test description . 20
8.3.2 Test method . 20
8.3.3 Limits . 21
ETSI
4 ETSI EN 301 843-1 V2.3.1 (2026-03)
8.4 AC mains power input/output ports . 21
8.4.0 Applicability . 21
8.4.1 Test description . 21
8.4.2 Test method . 21
8.4.3 Limits . 22
9 Test methods and levels for immunity tests . 23
9.0 General . 23
9.1 Test configuration. 23
9.2 Radio frequency electromagnetic field (80 MHz to 6 GHz) . 23
9.2.0 Applicability . 23
9.2.1 Test description . 23
9.2.2 Test method . 23
9.2.3 Performance criteria . 24
9.3 Electrostatic discharge . 24
9.3.0 Applicability . 24
9.3.1 Test description . 24
9.3.2 Test method . 24
9.3.3 Performance criteria . 24
9.4 Fast transients, differential and common mode . 25
9.4.0 Applicability . 25
9.4.1 Test description . 25
9.4.2 Test method . 25
9.4.3 Performance criteria . 25
9.5 Radio frequency, common mode . 25
9.5.0 Applicability . 25
9.5.1 Test description . 26
9.5.2 Test method . 26
9.5.3 Performance criteria . 26
9.6 Power supply variations . 26
9.6.0 Applicability . 26
9.6.1 Power supply short term variations . 27
9.6.1.1 Test description . 27
9.6.1.2 Test method . 27
9.6.1.3 Performance criteria . 27
9.6.2 Power supply failure . 27
9.6.2.1 Test description . 27
9.6.2.2 Test method . 27
9.6.2.3 Performance criteria . 27
9.7 Surges . 28
9.7.0 Applicability . 28
9.7.1 Test description . 28
9.7.2 Test method . 28
9.7.3 Performance criteria . 28
Annex A (informative): Guidance on setting the dwell time for radiated immunity testing . 29
A.1 Overview . 29
A.2 Example of EUT containing a GNSS receiver . 29
Annex B (informative): Bibliography . 30
Annex C (informative): Change history . 31
History . 32

ETSI
5 ETSI EN 301 843-1 V2.3.1 (2026-03)
Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
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Foreword
This European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility and
Radio spectrum Matters (ERM).
The present document is part 1 of a multi-part deliverable covering the ElectroMagnetic Compatibility (EMC) standard
for marine radio equipment and services, as identified below:
Part 1: "Common technical requirements";
Part 2: "Specific conditions for VHF radiotelephone transmitters and receivers operating in the frequency range
156 MHz to 174 MHz";
Part 3: "Specific conditions for non-SOLAS maritime radars and river radars";
Part 4: "Specific conditions for Narrow-Band Direct-Printing (NBDP) NAVTEX receivers";
Part 5: "Specific conditions for MF/HF radiotelephone transmitters and receivers";
Part 6: "Specific conditions for Earth Stations on board Vessels operating in frequency bands above 3 GHz";
Part 7: "Specific conditions for Maritime Broadband Radiolink equipment";
Part 8: "Specific conditions for radio beacons and locating devices".

ETSI
6 ETSI EN 301 843-1 V2.3.1 (2026-03)
National transposition dates
Date of adoption of this EN: 18 March 2026
Date of latest announcement of this EN (doa): 30 June 2026
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 31 December 2026
Date of withdrawal of any conflicting National Standard (dow): 31 December 2027

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The present document contains a full list of EMC requirements together with the standard test set-ups and compliance
limits, that should be used by the product specific parts within the ETSI EN 301 843 series. Deviations, where
applicable, from this are set out in the specific product related part.
Product dependent arrangements necessary to perform the EMC tests on dedicated types of radio equipment, and the
assessment of test results, are detailed in the appropriate relevant radio technology parts of ETSI EN 301 843 series
details of which can be found in the foreword of the present document.
The present document also acts as the basis for product specific parts of the ETSI EN 301 843 series. It is these product
specific parts that are intended to be cited in the OJEU under article 3.1(b) of Directive 2014/53/EU [i.8].

ETSI
7 ETSI EN 301 843-1 V2.3.1 (2026-03)
1 Scope
The present document contains the common requirements for marine radio communications and radio determination
equipment and associated ancillary equipment operating from any combination of internal batteries, DC and single
phase AC, in respect of ElectroMagnetic Compatibility (EMC).
The provisions of the present document apply to marine radio equipment not covered in the scope of the Council
Directive on marine equipment (the "Marine Equipment Directive" 2014/90/EU [i.4]).
Product dependent arrangements necessary to perform the EMC tests on dedicated types of marine radio
communications and radio determination equipment, and the assessment of test results, are detailed in the appropriate
product related parts of the present document.
The present document, together with the product related part, specifies the applicable EMC tests, the methods of
measurement, the limits and the performance criteria for marine radio equipment and associated ancillary equipment.
In case of differences (for instance concerning special conditions, definitions, abbreviation) between the present
document and the relevant product related part of the present document, the product related part takes precedence.
For the further content of the present document, the expression "radio equipment" is taken to mean marine radio
communications or radio determination equipment, in each individual case.
Technical specifications related to the antenna port of radio equipment and emissions from the enclosure port of radio
equipment and combinations of radio and associated ancillary equipment are not included in the present document.
Such technical specifications are normally found in the relevant product standards for the effective use of the radio
spectrum.
The environment classification used in the present document is maritime, as defined in EN IEC 60945 [i.3].
Marine radio communications equipment meeting the EMC requirements set out in EN IEC 61000-6-3 [i.1] and
EN 61000-6-1 [i.2] is deemed to meet also the EMC requirements for the maritime environment described in
EN IEC 60945 [i.3].
The EMC requirements have been selected to ensure an adequate level of compatibility for apparatus intended to be
used in the maritime environment. The levels, however, do not cover extreme cases which may occur in any location
but with low probability of occurrence.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found in the
ETSI docbox.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents are necessary for the application of the present document.
[1] EN IEC 55016-1-4:2019: "Specification for radio disturbance and immunity measuring apparatus
and methods – Part 1-4: Radio disturbance and immunity measuring apparatus – Antennas and test
sites for radiated disturbance measurements", (produced by CENELEC).
[2] EN IEC 55016-1-1:2019: "Specification for radio disturbance and immunity measuring apparatus
and methods - Part 1-1: Radio disturbance and immunity measuring apparatus - Measuring
apparatus", (produced by CENELEC).
ETSI
8 ETSI EN 301 843-1 V2.3.1 (2026-03)
[3] EN 61000-4-2:2009: "Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement
techniques - Electrostatic discharge immunity test", (produced by CENELEC).
[4] EN IEC 61000-4-3:2020: "Electromagnetic compatibility (EMC) - Part 4-3: Testing and
measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test",
(produced by CENELEC).
[5] EN 61000-4-4:2012: "Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst immunity test", (produced by CENELEC).
[6] EN 61000-4-5:2014 +A1:2017: "Electromagnetic compatibility (EMC) - Part 4-5: Testing and
measurement techniques - Surge immunity test", (produced by CENELEC).
[7] EN 61000-4-6:2014: "Electromagnetic compatibility (EMC) - Part 4-6: Testing and measurement
techniques - Immunity to conducted disturbances, induced by radio-frequency fields", (produced
by CENELEC).
[8] EN IEC 61000-4-11:2020: "Electromagnetic compatibility (EMC) –Part 4-11: Testing and
measurement techniques – Voltage dips, short interruptions and voltage variations immunity tests
for equipment with input current up to 16 A per phase", (produced by CENELEC).
[9] EN 55016-2-3:2017/A1:2019: "Specification for radio disturbance and immunity measuring
apparatus and methods - Part 2-3: Methods of measurement of disturbances and immunity -
Radiated disturbance measurements", (produced by CENELEC).
[10] EN 55016-2-1:2014+A1:2017: "Specification for radio disturbance and immunity measuring
apparatus and methods - Part 2-1: Methods of measurement of disturbances and immunity -
Conducted disturbance measurements", (produced by CENELEC).
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents may be useful in implementing an ETSI deliverable or add to the reader's
understanding, but are not required for conformance to the present document.
[i.1] EN IEC 61000-6-3 (2021): "Electromagnetic compatibility (EMC) - Part 6-3: Generic standards -
Emission standard for residential, commercial and light-industrial environments", (produced by
CENELEC).
[i.2] EN 61000-6-1 (2019): "Electromagnetic compatibility (EMC) - Part 6-1: Generic standards -
Immunity for residential, commercial and light-industrial environments", (produced by
CENELEC).
[i.3] EN 60945 (2002) + Corrigendum 1 (2008): "Maritime navigation and radiocommunication
equipment and systems - General requirements - Methods of testing and required test results",
(produced by CENELEC).
[i.4] Directive 2014/90/EU of the European Parliament and of the Council of 23 July 2014 on marine
equipment and repealing Council Directive 96/98/EC.
[i.5] IEC 60050-161 (1990): "International Electrotechnical Vocabulary. Chapter 161: Electromagnetic
compatibility".
[i.6] CEPT/ERC Recommendation 74-01 (2021): "Unwanted emissions in the spurious domain".
[i.7] IMO Convention: "International Convention for the Safety of Life at Sea (SOLAS)".
ETSI
9 ETSI EN 301 843-1 V2.3.1 (2026-03)
[i.8] Directive 2014/53/EU of the European Parliament and of the council of 16 April 2014 on the
harmonisation of the laws of the Member States relating to the making available on the market of
radio equipment and repealing Directive 1999/5/EC.
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the terms given in article 2 of Directive 2014/53/EU [i.8] and the following
apply:
ancillary equipment: equipment (apparatus), used in connection with a receiver, transmitter or transceiver is
considered as an ancillary equipment (apparatus) if:
• the equipment is intended for use in conjunction with a receiver or transmitter to provide additional operational
and/or control features to the radio equipment, (e.g. to extend control to another position or location); and
• the equipment cannot be used on a stand alone basis to provide user functions independently of a receiver or
transmitter; and
• the receiver or transmitter to which it is connected, is capable of providing some intended operation such as
transmitting and/or receiving without the ancillary equipment (i.e. it is not a sub-unit of the main equipment
essential to the main equipment basic functions)
artificial antenna: non-reactive, non-radiating dummy load equal to the nominal impedance of the antenna port
NOTE: For the purpose of EMC tests, the antenna port(s) of the Equipment Under Test (EUT) are terminated
with a non-radiating 50 Ω termination (artificial antenna) unless there is a requirement to apply a Radio
Frequency (RF) input signal to the receiver antenna port.
Artificial Mains Network (AMN): network used to supply the mains voltage (AC or DC) and current to the
Equipment Under Test (EUT)
continuous phenomena (continuous disturbance): electromagnetic disturbance, the effects of which on a particular
device or equipment cannot be resolved into a succession of distinct effects
NOTE: See IEC 60050-161 [i.5].
critical stored data: data that is essential for an EUT to perform a primary function in accordance with that EUT's
specifications.
enclosure port: physical boundary of the apparatus through which electromagnetic fields may radiate or impinge
NOTE: In the case of integral antenna equipment, this port is inseparable from the antenna port.
integral antenna: antenna designed to be connected directly to the equipment with or without the use of an external
connector and considered to be part of the equipment
NOTE: An integral antenna may be fitted internally or externally to the equipment. An antenna which may not be
removed during the tests, according to the manufacturer's statement.
mobile equipment: marine receiver, transmitter or transmitter/receiver (transceiver) intended for installation and use
onboard ships
operating frequency range: range(s) of radio frequencies covered by the Equipment Under Test (EUT) without any
change of units
port: particular interface, of the specified equipment (apparatus), with the electromagnetic environment
NOTE: For example, any connection point on an equipment intended for connection of cables to or from that
equipment is considered as a port (see Figure 1).
ETSI
10 ETSI EN 301 843-1 V2.3.1 (2026-03)
Enclosure port
Antenna port
AC power port
Signal/control port
DC power port
APPARATUS
Earth port Telecommunication port

Figure 1: Examples of ports
portable equipment: marine radio and/or ancillary equipment intended for portable (e.g. handheld) operation onboard
ships, and powered by its own integral battery
radio communications equipment: radio equipment which includes one or more radio transmitters and/or receivers
and/or parts thereof for use in a mobile or portable application onboard ships
radio determination equipment: radio equipment able to determine the position, velocity and/or other characteristics
of an object, or the obtaining of information relating to these parameters, by means of the propagation properties of
radio waves.
NOTE: This includes navigation radars
radio equipment: "An electrical or electronic product, which intentionally emits and/or receives radio waves for the
purpose of radio communication and/or radio determination, or an electrical or electronic product which must be
completed with an accessory, such as antenna, so as to intentionally emit and/or receive radio waves for the purpose of
radio communication and/or radio determination", definition from Directive 2014/53/EU [i.8].
NOTE: Radio equipment can be operated with ancillary equipment but if so, is not dependent on it for basic
functionality.
removable antenna: antenna which may be removed for the test according to the manufacturer statement
spurious emission: emission on a frequency, or frequencies, which are outside the Bn and the level of which may be
reduced without affecting the corresponding transmission of information
NOTE: Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and
frequency conversion products but exclude out of band emissions
(CEPT/ERC Recommendation 74-01 [i.6]).
transient phenomena (transient disturbance): pertaining to or designating a phenomena or a quantity which varies
between two consecutive steady states during a time interval short compared with the time-scale of interest
NOTE: See IEC 60050-161 [i.5].
worst case: configuration and arrangement of the EUT, ancillary equipment and connecting cables that produces the
worst emissions or the lowest immunity during testing
3.2 Symbols
For the purposes of the present document, the following symbols apply:
Bn Necessary bandwidth of an emission
PX Maximum PEP
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AC Alternating Current
AM Amplitude Modulation
AMN Artificial Mains Network
DC Direct Current
EM ElectroMagnetic
ETSI
11 ETSI EN 301 843-1 V2.3.1 (2026-03)
EMC ElectroMagnetic Compatibility
EUT Equipment Under Test
FSOATS Free Space Open Area Test Site
IEC International Electrotechnical Commission
IMO International Maritime Organization
MF/HF Medium Frequency/High Frequency
NAVTEX Navigational Telex
NBDP Narrow Band Direct Printing
PEP Peak Envelope Power
RF Radio Frequency
SAC Semi-Anechoic Chamber
VHF Very High Frequency
4 General and operational requirements
4.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be in accordance with its intended use, but as a minimum, shall be that specified in the test
conditions contained in the present document. The equipment shall comply with all the technical requirements of the
present document at all times when operating within the boundary limits of the operational environmental profile
defined by its intended use.
The equipment shall be tested under normal test conditions according to the relevant product and basic standards or to
the information accompanying the equipment.
The test shall be carried out at a point within the specified normal operating environmental range of temperature and
humidity with the equipment connected to the intended power supply voltage. The normal temperature and humidity
conditions shall be a combination of temperature and humidity within the following ranges:
• temperature: +15 °C to +35 °C
• relative humidity: 25 % to 75 %
The test voltage for equipment to be connected to the AC mains, shall be the nominal (rated) mains voltage. The
frequency of the test voltage shall be 50 Hz and its offset shall not exceed 1 Hz.
The test voltage for equipment to be connected to a battery, shall be the nominal voltage of the battery as specified in
the user documentation.
The test conditions, configuration, and mode of operation shall represent the intended use and shall be recorded.
For emission and immunity tests, specific product type related information on the test modulation, test conditions and
tests arrangements, etc., are found in the part of the present document dealing with the particular type of radio
equipment.
4.2 Arrangements for test signals
4.2.0 General
Standalone receivers and transmitters shall be tested separately. Transceivers shall be tested so that operation in each
direction is confirmed.
4.2.1 Arrangements for test signals at the input of transmitters
The signal source providing the transmitter under test with the modulation signal for the normal test modulation shall be
located outside the test environment, unless the transmitter is modulated by its own internal source.
ETSI
12 ETSI EN 301 843-1 V2.3.1 (2026-03)
4.2.2 Arrangements for test signals at the output of transmitters
The measuring and monitoring equipment for the wanted RF output signal from the transmitter under test shall be
located outside the test environment.
For transmitters with an integral antenna, the wanted RF output signal to establish a communication link shall be
delivered from the EUT to an antenna located within the test environment. This antenna shall be connected to the
external equipment by a coaxial cable.
For transmitters with a removable antenna, the wanted RF output signal to establish a communication link shall be
delivered from the antenna connector to the external equipment by a shielded transmission line, such as a coaxial cable.
The level of the wanted RF output signal in transmit mode of operation shall be set to the maximum rated RF power for
the EUT.
4.2.3 Arrangements for test signals at the input of receivers
The signal source providing the receiver under test with the wanted RF input signal shall be located outside the test
environment.
For receivers with an integral antenna, the wanted RF input signal to establish a communication link shall be presented
to the EUT from an antenna located within the test environment. This antenna shall be connected to the external RF
signal source by a coaxial cable.
For receivers with a removable antenna, the wanted RF input signal to establish a communication link shall be
presented to the antenna connector of the EUT by a shielded transmission line, such as e.g. a coaxial cable. The
transmission line shall be connected to the external RF signal source.
The level of the wanted RF input signal is expected to represent a signal level and is intended to avoid the broadband
noise from the power amplifiers generating the EM disturbance from influencing the measurement.
4.2.4 Arrangements for test signals at the output of receivers
The measuring and monitoring equipment for the output signal from the receiver under test shall be located outside the
test environment.
If the receiver has an output connector or port providing the wanted baseband output signal, then this port should be
used in a manner consistent with its intended use.
For receivers without an output connector, thus providing a visual or acoustic indicating of the received signal, this
output should be coupled via an electrically non-conductive means to the external equipment.
For receivers with an analogue speech output the audio output from the acoustic transducer, this output should be
coupled via an electrically non-conductive acoustic tube to an external audio distortion meter or other measuring
equipment as required.
Precautions will need to be taken to ensure that any effect on the test due to the coupling means is minimized.
4.2.5 Arrangements for testing transmitter and receiver together
(as a system)
Transmitters and receivers may be tested for immunity as a system when combined as a transceiver or the combined
equipment is of a size which allows simultaneous testing. In this case the transceiver or transmitter and receiver shall be
located inside the test environment and shall be exposed simultaneously to the immunity test signals.
The test modulation shall be transmitted by the test system and looped back in the EUT. Further, the output of the EUT
shall be monitored by the test system.
4.3 RF exclusion band of radio communications equipment
For the purpose of EMC tests set up in the present document, the radio communications or radio determination
equipment is subject to an exclusion band.
ETSI
13 ETSI EN 301 843-1 V2.3.1 (2026-03)
The RF exclusion band shall apply to radio communications and determination equipment intended for operation at
designated frequencies up to 6 GHz.
Particular care is required for radio equipment intended for operation at designated frequencies less than or equal to
30 MHz. Under these circumstances the RF exclusion band shall apply to EMC emission measurements and immunity
tests for conducted disturbances at AC mains and/or DC power ports which are performed in the frequency range up to
30 MHz.
The following provisions shall apply to all types of radio equipment:
• transmitters and transceivers:
- the RF exclusion band applies to EMC emission measurements in transmit mode of operation, and to
immunity tests. For equipment in stand-by mode, the exclusion band for transmitters shall not apply to
EMC emission measurements;
• receivers:
- the RF exclusion band applies to immunity tests only;
• ancillary equipment:
- for ancillary equipment intended to be tested on a stand alone basis, an RF exclusion band does not
apply;
- for ancillary equipment intended to be tested in combination with radio equipment the provisions above
for transmitters and/or receivers apply.
4.4 Intermediate frequency responses of receivers or receivers
which are part of transceivers
Responses on
...

SLOVENSKI STANDARD
oSIST prEN 301 843-1 V2.3.0:2026
01-februar-2026
Standard elektromagnetne združljivosti (EMC) za pomorsko radijsko opremo in
storitve - 1. del: Splošne tehnične zahteve
ElectroMagnetic Compatibility (EMC) standard for marine radio equipment and services -
Part 1: Common technical requirements
Ta slovenski standard je istoveten z: ETSI EN 301 843-1 V2.3.0 (2025-12)
ICS:
33.060.20 Sprejemna in oddajna Receiving and transmitting
oprema equipment
33.100.01 Elektromagnetna združljivost Electromagnetic compatibility
na splošno in general
47.020.70 Navigacijska in krmilna Navigation and control
oprema equipment
oSIST prEN 301 843-1 V2.3.0:2026 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 301 843-1 V2.3.0:2026

oSIST prEN 301 843-1 V2.3.0:2026
Draft ETSI EN 301 843-1 V2.3.0 (2025-12)

EUROPEAN STANDARD
ElectroMagnetic Compatibility (EMC) standard
for marine radio equipment and services;
Part 1: Common technical requirements

oSIST prEN 301 843-1 V2.3.0:2026
2 Draft ETSI EN 301 843-1 V2.3.0 (2025-12)

Reference
REN/ERM-EMC-413
Keywords
EMC, maritime, radio, regulation
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ETSI
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Contents
Intellectual Property Rights . 5
Foreword . 5
Modal verbs terminology . 6
Introduction . 6
1 Scope . 7
2 References . 7
2.1 Normative references . 7
2.2 Informative references . 8
3 Definition of terms, symbols and abbreviations . 9
3.1 Terms . 9
3.2 Symbols . 10
3.3 Abbreviations . 10
4 General and operational requirements . 11
4.1 Environmental profile . 11
4.2 Arrangements for test signals . 11
4.2.0 General . 11
4.2.1 Arrangements for test signals at the input of transmitters . 12
4.2.2 Arrangements for test signals at the output of transmitters . 12
4.2.3 Arrangements for test signals at the input of receivers . 12
4.2.4 Arrangements for test signals at the output of receivers . 12
4.2.5 Arrangements for testing transmitter and receiver together (as a system) . 12
4.3 RF exclusion band of radio communications equipment. 13
4.4 Intermediate frequency responses of receivers or receivers which are part of transceivers . 13
4.5 Void . 14
5 Performance assessment . 14
5.1 General . 14
5.2 Equipment which can provide a continuous communication link . 14
5.3 Equipment which does not provide a continuous communication link . 14
5.4 Ancillary equipment . 15
5.5 Equipment classification . 15
6 Performance criteria . 15
6.0 General requirements . 15
6.1 Performance criteria A for continuous phenomena applied to transmitters and receivers. 16
6.2 Performance criteria B for transient phenomena applied to transmitters and receivers . 16
6.3 Performance criteria C applied to power supply failure . 16
6.4 Void . 16
6.5 Performance criteria for equipment which does not provide a continuous communication link . 16
6.6 Performance criteria for ancillary equipment tested on a stand alone basis . 17
7 Applicability . 17
8 Testing for compliance with technical requirements . 17
8.1 Test configuration. 17
8.2 Enclosure emissions . 18
8.2.0 Applicability . 18
8.2.1 Test description . 18
8.2.2 Test method . 18
8.2.3 Limits . 19
8.3 DC power input/output ports . 20
8.3.0 Applicability . 20
8.3.1 Test description . 20
8.3.2 Test method . 20
8.3.3 Limits . 21
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8.4 AC mains power input/output ports . 21
8.4.0 Applicability . 21
8.4.1 Test description . 21
8.4.2 Test method . 21
8.4.3 Limits . 22
9 Test methods and levels for immunity tests . 23
9.0 General . 23
9.1 Test configuration. 23
9.2 Radio frequency electromagnetic field (80 MHz to 6 GHz) . 23
9.2.0 Applicability . 23
9.2.1 Test description . 23
9.2.2 Test method . 23
9.2.3 Performance criteria . 24
9.3 Electrostatic discharge . 24
9.3.0 Applicability . 24
9.3.1 Test description . 24
9.3.2 Test method . 24
9.3.3 Performance criteria . 24
9.4 Fast transients, differential and common mode . 25
9.4.0 Applicability . 25
9.4.1 Test description . 25
9.4.2 Test method . 25
9.4.3 Performance criteria . 25
9.5 Radio frequency, common mode . 25
9.5.0 Applicability . 25
9.5.1 Test description . 26
9.5.2 Test method . 26
9.5.3 Performance criteria . 26
9.6 Power supply variations . 26
9.6.0 Applicability . 26
9.6.1 Power supply short term variations . 27
9.6.1.1 Test description . 27
9.6.1.2 Test method . 27
9.6.1.3 Performance criteria . 27
9.6.2 Power supply failure . 27
9.6.2.1 Test description . 27
9.6.2.2 Test method . 27
9.6.2.3 Performance criteria . 27
9.7 Surges . 28
9.7.0 Applicability . 28
9.7.1 Test description . 28
9.7.2 Test method . 28
9.7.3 Performance criteria . 28
Annex A (informative): Guidance on setting the dwell time for radiated immunity testing . 29
A.1 Overview . 29
A.2 Example of EUT containing a GNSS receiver . 29
Annex B (informative): Bibliography . 30
Annex C (informative): Change history . 31
History . 32

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Intellectual Property Rights
Essential patents
IPRs essential or potentially essential to normative deliverables may have been declared to ETSI. The declarations
pertaining to these essential IPRs, if any, are publicly available for ETSI members and non-members, and can be
found in ETSI SR 000 314: "Intellectual Property Rights (IPRs); Essential, or potentially Essential, IPRs notified to
ETSI in respect of ETSI standards", which is available from the ETSI Secretariat. Latest updates are available on the
ETSI IPR online database.
Pursuant to the ETSI Directives including the ETSI IPR Policy, no investigation regarding the essentiality of IPRs,
including IPR searches, has been carried out by ETSI. No guarantee can be given as to the existence of other IPRs not
referenced in ETSI SR 000 314 (or the updates on the ETSI Web server) which are, or may be, or may become,
essential to the present document.
Trademarks
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not constitute an endorsement by ETSI of products, services or organizations associated with those trademarks.
DECT™, PLUGTESTS™, UMTS™ and the ETSI logo are trademarks of ETSI registered for the benefit of its
Members. 3GPP™, LTE™ and 5G™ logo are trademarks of ETSI registered for the benefit of its Members and of the
3GPP Organizational Partners. oneM2M™ logo is a trademark of ETSI registered for the benefit of its Members and of ®
the oneM2M Partners. GSM and the GSM logo are trademarks registered and owned by the GSM Association.
Foreword
This draft European Standard (EN) has been produced by ETSI Technical Committee Electromagnetic compatibility
and Radio spectrum Matters (ERM), and is now submitted for the combined Public Enquiry and Vote phase of the ETSI
EN Approval Procedure (ENAP).
The present document is part 1 of a multi-part deliverable covering the ElectroMagnetic Compatibility (EMC) standard
for marine radio equipment and services, as identified below:
Part 1: "Common technical requirements";
Part 2: "Specific conditions for VHF radiotelephone transmitters and receivers operating in the frequency range
156 MHz to 174 MHz";
Part 3: "Specific conditions for non-SOLAS maritime radars and river radars";
Part 4: "Specific conditions for Narrow-Band Direct-Printing (NBDP) NAVTEX receivers";
Part 5: "Specific conditions for MF/HF radiotelephone transmitters and receivers";
Part 6: "Specific conditions for Earth Stations on board Vessels operating in frequency bands above 3 GHz";
Part 7: "Specific conditions for Maritime Broadband Radiolink equipment";
Part 8: "Specific conditions for radio beacons and locating devices".
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Proposed national transposition dates
Date of latest announcement of this EN (doa): 3 months after ETSI publication
Date of latest publication of new National Standard
or endorsement of this EN (dop/e): 6 months after doa
Date of withdrawal of any conflicting National Standard (dow): 18 months after doa

Modal verbs terminology
In the present document "shall", "shall not", "should", "should not", "may", "need not", "will", "will not", "can" and
"cannot" are to be interpreted as described in clause 3.2 of the ETSI Drafting Rules (Verbal forms for the expression of
provisions).
"must" and "must not" are NOT allowed in ETSI deliverables except when used in direct citation.
Introduction
The present document contains a full list of EMC requirements together with the standard test set-ups and compliance
limits, that should be used by the product specific parts within the ETSI EN 301 843 series [i.9]. Deviations, where
applicable, from this are set out in the specific product related part.
Product dependent arrangements necessary to perform the EMC tests on dedicated types of radio equipment, and the
assessment of test results, are detailed in the appropriate relevant radio technology parts of ETSI EN 301 843 series [i.9]
details of which can be found in the foreword of the present document.
The present document also acts as the basis for product specific parts of the ETSI EN 301 843 series [i.9]. It is these
product specific parts that are intended to be cited in the OJEU under article 3.1(b) of Directive 2014/53/EU [i.8].

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1 Scope
The present document contains the common requirements for marine radio communications and radio determination
equipment and associated ancillary equipment operating from any combination of internal batteries, DC and single
phase AC, in respect of ElectroMagnetic Compatibility (EMC).
The provisions of the present document apply to marine radio equipment not covered in the scope of the Council
Directive on marine equipment (the "Marine Equipment Directive" 2014/90/EU [i.4]).
Product dependent arrangements necessary to perform the EMC tests on dedicated types of marine radio
communications and radio determination equipment, and the assessment of test results, are detailed in the appropriate
product related parts of the present document.
The present document, together with the product related part, specifies the applicable EMC tests, the methods of
measurement, the limits and the performance criteria for marine radio equipment and associated ancillary equipment.
In case of differences (for instance concerning special conditions, definitions, abbreviation) between the present
document and the relevant product related part of the present document, the product related part takes precedence.
For the further content of the present document, the expression "radio equipment" is taken to mean marine radio
communications or radio determination equipment, in each individual case.
Technical specifications related to the antenna port of radio equipment and emissions from the enclosure port of radio
equipment and combinations of radio and associated ancillary equipment are not included in the present document.
Such technical specifications are normally found in the relevant product standards for the effective use of the radio
spectrum.
The environment classification used in the present document is maritime, as defined in EN IEC 60945 [i.3].
Marine radio communications equipment meeting the EMC requirements set out in EN IEC 61000-6-3 [i.1] and
EN 61000-6-1 [i.2] is deemed to meet also the EMC requirements for the maritime environment described in
EN IEC 60945 [i.3].
The EMC requirements have been selected to ensure an adequate level of compatibility for apparatus intended to be
used in the maritime environment. The levels, however, do not cover extreme cases which may occur in any location
but with low probability of occurrence.
2 References
2.1 Normative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
Referenced documents which are not found to be publicly available in the expected location might be found in the
ETSI docbox.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents are necessary for the application of the present document.
[1] EN IEC 55016-1-4:2019: "Specification for radio disturbance and immunity measuring apparatus
and methods – Part 1-4: Radio disturbance and immunity measuring apparatus – Antennas and test
sites for radiated disturbance measurements", (produced by CENELEC).
[2] EN IEC 55016-1-1:2019: "Specification for radio disturbance and immunity measuring apparatus
and methods - Part 1-1: Radio disturbance and immunity measuring apparatus - Measuring
apparatus", (produced by CENELEC).
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[3] EN 61000-4-2:2009: "Electromagnetic compatibility (EMC) - Part 4-2: Testing and measurement
techniques - Electrostatic discharge immunity test", (produced by CENELEC).
[4] EN IEC 61000-4-3:2020: "Electromagnetic compatibility (EMC) - Part 4-3: Testing and
measurement techniques - Radiated, radio-frequency, electromagnetic field immunity test",
(produced by CENELEC).
[5] EN 61000-4-4:2012: "Electromagnetic compatibility (EMC) - Part 4-4: Testing and measurement
techniques - Electrical fast transient/burst immunity test", (produced by CENELEC).
[6] EN 61000-4-5:2014 +A1:2017: "Electromagnetic compatibility (EMC) - Part 4-5: Testing and
measurement techniques - Surge immunity test", (produced by CENELEC).
[7] EN 61000-4-6:2014: "Electromagnetic compatibility (EMC) - Part 4-6: Testing and measurement
techniques - Immunity to conducted disturbances, induced by radio-frequency fields", (produced
by CENELEC).
[8] EN IEC 61000-4-11:2020: "Electromagnetic compatibility (EMC) –Part 4-11: Testing and
measurement techniques – Voltage dips, short interruptions and voltage variations immunity tests
for equipment with input current up to 16 A per phase", (produced by CENELEC).
[9] EN 55016-2-3:2017/A1:2019: "Specification for radio disturbance and immunity measuring
apparatus and methods - Part 2-3: Methods of measurement of disturbances and immunity -
Radiated disturbance measurements", (produced by CENELEC).
[10] EN 55016-2-1:2014+A1:2017: "Specification for radio disturbance and immunity measuring
apparatus and methods - Part 2-1: Methods of measurement of disturbances and immunity -
Conducted disturbance measurements", (produced by CENELEC).
2.2 Informative references
References are either specific (identified by date of publication and/or edition number or version number) or
non-specific. For specific references, only the cited version applies. For non-specific references, the latest version of the
referenced document (including any amendments) applies.
NOTE: While any hyperlinks included in this clause were valid at the time of publication, ETSI cannot guarantee
their long-term validity.
The following referenced documents may be useful in implementing an ETSI deliverable or add to the reader's
understanding, but are not required for conformance to the present document.
[i.1] EN IEC 61000-6-3 (2021): "Electromagnetic compatibility (EMC) - Part 6-3: Generic standards -
Emission standard for residential, commercial and light-industrial environments", (produced by
CENELEC).
[i.2] EN 61000-6-1 (2019): "Electromagnetic compatibility (EMC) - Part 6-1: Generic standards -
Immunity for residential, commercial and light-industrial environments", (produced by
CENELEC).
[i.3] EN 60945 (2002) + Corrigendum 1 (2008): "Maritime navigation and radiocommunication
equipment and systems - General requirements - Methods of testing and required test results",
(produced by CENELEC).
[i.4] Directive 2014/90/EU of the European Parliament and of the Council of 23 July 2014 on marine
equipment and repealing Council Directive 96/98/EC.
[i.5] IEC 60050-161 (1990): "International Electrotechnical Vocabulary. Chapter 161: Electromagnetic
compatibility".
[i.6] CEPT/ERC Recommendation 74-01 (2021): "Unwanted emissions in the spurious domain".
[i.7] IMO Convention: "International Convention for the Safety of Life at Sea (SOLAS)".
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[i.8] Directive 2014/53/EU of the European Parliament and of the council of 16 April 2014 on the
harmonisation of the laws of the Member States relating to the making available on the market of
radio equipment and repealing Directive 1999/5/EC.
[i.9] ETSI EN 301 489 series: "ElectroMagnetic Compatibility (EMC) standard for marine radio
equipment and services".
3 Definition of terms, symbols and abbreviations
3.1 Terms
For the purposes of the present document, the terms given in article 2 of Directive 2014/53/EU [i.8] and the following
apply:
ancillary equipment: equipment (apparatus), used in connection with a receiver, transmitter or transceiver is
considered as an ancillary equipment (apparatus) if:
• the equipment is intended for use in conjunction with a receiver or transmitter to provide additional operational
and/or control features to the radio equipment, (e.g. to extend control to another position or location); and
• the equipment cannot be used on a stand alone basis to provide user functions independently of a receiver or
transmitter; and
• the receiver or transmitter to which it is connected, is capable of providing some intended operation such as
transmitting and/or receiving without the ancillary equipment (i.e. it is not a sub-unit of the main equipment
essential to the main equipment basic functions)
artificial antenna: non-reactive, non-radiating dummy load equal to the nominal impedance of the antenna port
NOTE: For the purpose of EMC tests, the antenna port(s) of the Equipment Under Test (EUT) are terminated
with a non-radiating 50 Ω termination (artificial antenna) unless there is a requirement to apply a Radio
Frequency (RF) input signal to the receiver antenna port.
Artificial Mains Network (AMN): network used to supply the mains voltage (AC or DC) and current to the
Equipment Under Test (EUT)
continuous phenomena (continuous disturbance): electromagnetic disturbance, the effects of which on a particular
device or equipment cannot be resolved into a succession of distinct effects
NOTE: See IEC 60050-161 [i.5].
critical stored data: data that is essential for an EUT to perform a primary function in accordance with that EUT's
specifications.
enclosure port: physical boundary of the apparatus through which electromagnetic fields may radiate or impinge
NOTE: In the case of integral antenna equipment, this port is inseparable from the antenna port.
integral antenna: antenna designed to be connected directly to the equipment with or without the use of an external
connector and considered to be part of the equipment
NOTE: An integral antenna may be fitted internally or externally to the equipment. An antenna which may not be
removed during the tests, according to the manufacturer's statement.
mobile equipment: marine receiver, transmitter or transmitter/receiver (transceiver) intended for installation and use
onboard ships
operating frequency range: range(s) of radio frequencies covered by the Equipment Under Test (EUT) without any
change of units
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port: particular interface, of the specified equipment (apparatus), with the electromagnetic environment
NOTE: For example, any connection point on an equipment intended for connection of cables to or from that
equipment is considered as a port (see Figure 1).
Enclosure port
Antenna port
AC power port
Signal/control port
DC power port
APPARATUS
Telecommunication port
Earth port
Figure 1: Examples of ports
portable equipment: marine radio and/or ancillary equipment intended for portable (e.g. handheld) operation onboard
ships, and powered by its own integral battery
radio communications equipment: radio equipment which includes one or more radio transmitters and/or receivers
and/or parts thereof for use in a mobile or portable application onboard ships
radio determination equipment: radio equipment able to determine the position, velocity and/or other characteristics
of an object, or the obtaining of information relating to these parameters, by means of the propagation properties of
radio waves.
NOTE: This includes navigation radars
radio equipment: "An electrical or electronic product, which intentionally emits and/or receives radio waves for the
purpose of radio communication and/or radio determination, or an electrical or electronic product which must be
completed with an accessory, such as antenna, so as to intentionally emit and/or receive radio waves for the purpose of
radio communication and/or radio determination", definition from Directive 2014/53/EU [i.8].
NOTE: Radio equipment can be operated with ancillary equipment but if so, is not dependent on it for basic
functionality.
removable antenna: antenna which may be removed for the test according to the manufacturer statement
spurious emission: emission on a frequency, or frequencies, which are outside the necessary bandwidth and the level of
which may be reduced without affecting the corresponding transmission of information
NOTE: Spurious emissions include harmonic emissions, parasitic emissions, intermodulation products and
frequency conversion products but exclude out of band emissions
(CEPT/ERC Recommendation 74-01 [i.6]).
transient phenomena (transient disturbance): pertaining to or designating a phenomena or a quantity which varies
between two consecutive steady states during a time interval short compared with the time-scale of interest
NOTE: See IEC 60050-161 [i.5].
worst case: configuration and arrangement of the EUT, ancillary equipment and connecting cables that produces the
worst emissions or the lowest immunity during testing
3.2 Symbols
For the purposes of the present document, the following symbols apply:
Bn Necessary bandwidth of an emission
PX Maximum PEP
3.3 Abbreviations
For the purposes of the present document, the following abbreviations apply:
AC Alternating Current
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AM Amplitude Modulation
AMN Artificial Mains Network
B measurement Bandwidth
DC Direct Current
EM ElectroMagnetic
EMC ElectroMagnetic Compatibility
EUT Equipment Under Test
FSOATS Free Space Open Area Test Site
IEC International Electrotechnical Commission
IMO International Maritime Organization
MF/HF Medium Frequency/High Frequency
NAVTEX Navigational Telex
NBDP Narrow Band Direct Printing
RF Radio Frequency
SAC Semi-Anechoic Chamber
VHF Very High Frequency
4 General and operational requirements
4.1 Environmental profile
The technical requirements of the present document apply under the environmental profile for operation of the
equipment, which shall be in accordance with its intended use, but as a minimum, shall be that specified in the test
conditions contained in the present document. The equipment shall comply with all the technical requirements of the
present document at all times when operating within the boundary limits of the operational environmental profile
defined by its intended use.
The equipment shall be tested under normal test conditions according to the relevant product and basic standards or to
the information accompanying the equipment.
The test shall be carried out at a point within the specified normal operating environmental range of temperature and
humidity with the equipment connected to the intended power supply voltage. The normal temperature and humidity
conditions shall be a combination of temperature and humidity within the following ranges:
• temperature: +15 °C to +35 °C
• relative humidity: 25 % to 75 %
The test voltage for equipment to be connected to the AC mains, shall be the nominal (rated) mains voltage. The
frequency of the test voltage shall be 50 Hz and its offset shall not exceed 1 Hz.
The test voltage for equipment to be connected to a battery, shall be the nominal voltage of the battery as specified in
the user documentation.
The test conditions, configuration, and mode of operation shall represent the intended use and shall be recorded.
For emission and immunity tests, specific product type related information on the test modulation, test conditions and
tests arrangements, etc., are found in the part of the present document dealing with the particular type of radio
equipment.
4.2 Arrangements for test signals
4.2.0 General
Standalone receivers and transmitters shall be tested separately. Transceivers shall be tested so that operation in each
direction is confirmed.
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4.2.1 Arrangements for test signals at the input of transmitters
The signal source providing the transmitter under test with the modulation signal for the normal test modulation shall be
located outside the test environment, unless the transmitter is modulated by its own internal source.
4.2.2 Arrangements for test signals at the output of transmitters
The measuring and monitoring equipment for the wanted RF output signal from the transmitter under test shall be
located outside the test environment.
For transmitters with an integral antenna, the wanted RF output signal to establish a communication link shall be
delivered from the EUT to an antenna located within the test environment. This antenna shall be connected to the
external equipment by a coaxial cable.
For transmitters with a removable antenna, the wanted RF output signal to establish a communication link shall be
delivered from the antenna connector to the external equipment by a shielded transmission line, such as a coaxial cable.
The level of the wanted RF output signal in transmit mode of operation shall be set to the maximum rated RF power for
the EUT.
4.2.3 Arrangements for test signals at the input of receivers
The signal source providing the receiver under test with the wanted RF input signal shall be located outside the test
environment.
For receivers with an integral antenna, the wanted RF input signal to establish a communication link shall be presented
to the EUT from an antenna located within the test environment. This antenna shall be connected to the external RF
signal source by a coaxial cable.
For receivers with a removable antenna, the wanted RF input signal to establish a communication link shall be
presented to the antenna connector of the EUT by a shielded transmission line, such as e.g. a coaxial cable. The
transmission line shall be connected to the external RF signal source.
The level of the wanted RF input signal is expected to represent a signal level and is intended to avoid the broadband
noise from the power amplifiers generating the EM disturbance from influencing the measurement.
4.2.4 Arrangements for test signals at the output of receivers
The measuring and monitoring equipment for the output signal from the receiver under test shall be located outside the
test environment.
If the receiver has an output connector or port providing the wanted baseband output signal, then this port should be
used in a manner consistent with its intended use.
For receivers without an output connector, thus providing a visual or acoustic indicating of the received signal, this
output should be coupled via an electrically non-conductive means to the external equipment.
For receivers with an analogue speech output the audio output from the acoustic transducer, this output should be
coupled via an electrically non-conductive acoustic tube to an external audio distortion meter or other measuring
equipment as required.
Precautions will need to be taken to ensure that any effect on the test due to the coupling means is minimized.
4.2.5 Arrangements for testing transmitter and receiver together
(as a system)
Transmitters and receivers may be tested for immunity as a system when combined as a transceiver or the combined
equipment is of a size which allows simultaneous testing. In this case the transceiver or transmitter and receiver shall be
located inside the test environment and shall be exposed simultaneously to the immunity test signals.
The test modulation shall be transmitted by the test system and looped back in the EUT. Further, the output of t
...