ISO 16273:2020
(Main)Ships and marine technology — Night vision equipment for high-speed craft — Operational and performance requirements, methods of testing and required test results
Ships and marine technology — Night vision equipment for high-speed craft — Operational and performance requirements, methods of testing and required test results
This document specifies operational and performance requirements and methods of testing for night vision equipment fitted to high-speed craft. NOTE In this document, the text identical to IMO Resolution MSC.94 (72) is printed in italics; references to the paragraphs concerned in the IMO Resolution are given in brackets.
Navires et technologie maritime — Équipement de vision nocturne pour navires à grande vitesse — Exigences opérationnelles et de performance, méthodes d'essai et résultats d'essai exigés
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INTERNATIONAL ISO
STANDARD 16273
Second edition
2020-09
Ships and marine technology — Night
vision equipment for high-speed
craft — Operational and performance
requirements, methods of testing and
required test results
Navires et technologie maritime — Équipement de vision nocturne
pour navires à grande vitesse — Exigences opérationnelles et de
performance, méthodes d'essai et résultats d'essai exigés
Reference number
©
ISO 2020
© ISO 2020
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ii © ISO 2020 – All rights reserved
Contents Page
Foreword .v
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Performance requirements . 3
4.1 Functions and their availability . 3
4.2 Continuous operation . 3
4.3 Standard test target . 3
4.4 Detection range . 3
4.5 Field of view . 3
4.6 Pan and tilt ranges of the field of view . 3
4.7 Speeds of panning of the field of view . 4
4.8 Stabilisation of the field of view against the motions of the vessel . 4
4.9 Heading marker indication . 4
4.10 Clear view . 4
4.11 Roll and pitch . 4
4.12 Optical interference . 4
4.13 Line of sight . 5
4.14 Controls and ergonomics . 5
4.15 Presentation of information . 5
4.16 Software . 6
4.17 Durability and resistance to environmental conditions . 6
4.18 Electrical and electromagnetic interference . 6
4.19 Power supply . 6
4.20 Back up and fall back arrangements . 6
4.21 Malfunctions, alerts and indications . 7
4.22 Interfacing . 7
4.23 Safety precautions . 7
4.24 Acoustic noise and signals . 7
4.25 Compass safe distance . 7
4.26 Active illumination for active image intensifier system . 8
5 Methods of testing and required test results . 8
5.1 General test conditions . 8
5.1.1 General. 8
5.1.2 Performance test . 8
5.1.3 Performance check . . 8
5.1.4 Performance check (EMC) . 8
5.2 Environmental tests . 8
5.2.1 General. 8
5.2.2 Sensor shock test . 9
5.2.3 Roll and pitch test . 9
5.2.4 Optical interference test .10
5.2.5 Line of sight test .10
5.3 Interface test .10
5.4 Further laboratory tests .10
5.4.1 General.10
5.4.2 Test for all types of night vision equipment .10
5.4.3 Test of thermal imaging systems .12
5.4.4 Test of active image-intensifier systems . .13
5.5 Sea trials .14
5.5.1 Introduction .14
5.5.2 Standard test target .15
5.5.3 Test conditions.15
5.5.4 Test procedures.15
6 Marking and identification .17
7 Installation .17
8 Maintenance .18
9 Documentation .18
Annex A (informative) Range prediction calculation .19
Annex B (informative) Infrared illuminator, typical plots .21
Annex C (informative) Sea trial record .22
Annex D (normative) Measurement of MTDP (minimum temperature difference perceived)
of thermal imagers .24
Annex E (normative) Stabilisation test for thermal imaging systems .28
Annex F (normative) Stabilisation test active image-intensifier systems .29
Bibliography .30
iv © ISO 2020 – All rights reserved
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see www .iso .org/
iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 8, Ships and marine technology,
Subcommittee SC 6, Navigation and ship operations.
This second edition cancels and replaces the first edition (ISO 16273:2003), which has been technically
revised.
The main changes compared to the previous edition are as follows:
— definitions 3.5 "performance check", 3.6 "performance check (EMC)", 3.7 "performance test" 3.8
"single operator action”, 3.9 “field of view" and 3.10 “instantaneous field of view" have been added;
— 4.8 "Stabilisation of the field of view against the motions of the vessel" has been added;
— 4.10 "Clear view", former 4.11, has been clarified;
— 4.13 "Line of sight" has been added;
— 4.15 "Presentation of information", former 4.16, has been modified;
— 4.22 "Interfacing" has been modified;
— 5.1.2 "Performance test" has been added;
— 5.1.3 "Performance check", former 6.3, has been modified;
— 5.1.4 "Performance check (EMC)" has been added;
— 5.2.3 "Roll and pitch test", former 6.2.2, has been modified;
— 5.4.2.8 "Wind endurance test" has been added;
— 5.4.3 "Test of thermal imaging systems", former 7.2, has been modified;
— 5.4.3.2, Table 2 "Atmospheric extinction coefficients for different wavelength ranges" values have
been adjusted;
— 5.4.4 "Test of active image-intensifier systems", former 7.3, has been modified and testing of non-
visible illumination has been added;
— 5.5 "Sea trials", former Clause 8, has been modified, the surface of test specimen has been specified;
— Annex D (normative) "Measurement of MTDP (minimum temperature difference perceived) of
thermal imagers" has been added;
— Annex E (normative) "Stabilisation test for thermal imaging systems" has been added.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
vi © ISO 2020 – All rights reserved
Introduction
This document has been developed to support the implementation of the International Code of Safety
for High-Speed Craft (HSC code), Chapter 13, of the International Maritime Organisation (IMO), and
the IMO performance standards for night vision equipment for high-speed craft in the IMO Resolution
MSC.94 (72)
INTERNATIONAL STANDARD ISO 16273:2020(E)
Ships and marine technology — Night vision equipment
for high-speed craft — Operational and performance
requirements, methods of testing and required test results
1 Scope
This document specifies operational and performance requirements and methods of testing for night
vision equipment fitted to high-speed craft.
NOTE In this document, the text identical to IMO Resolution MSC.94 (72) is printed in italics; references to
the paragraphs concerned in the IMO Resolution are given in brackets.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 9335, Optics and photonics — Optical transfer function — Principles and procedures of measurement
ISO 15529, Optics and photonics — Optical transfer function — Principles of measurement of modulation
transfer function (MTF) of sampled imaging systems
IEC 60945, Maritime navigation and radiocommunication equipment and systems — General
requirements — Methods of testing and required test results
IEC 61162, Maritime navigation and radiocommunication equipment and systems — Digital Interfaces
IEC 62288:2014, Maritime navigation and radiocommunication equipment and systems — Presentation
of navigation-related information on shipborne navigational displays — General requirements, methods of
testing and required test results
IEC 62388:2013, Maritime navigation and radiocommunication equipment and systems — Shipborne
radar — Performance requirements, methods of testing and required test results
IEC 62923, Maritime navigation and radiocommunication equipment and systems — Bridge alert
management (all parts)
IMO Resolution A.694(17), General requirements for shipborne radio equipment forming part of the global
maritime distress and safety system (GMDSS) and for electronic navigational aids
IMO Resolution MSC.94(72), Performance standards for night vision equipment for high speed craft
IMO Resolution MSC.191(79), Performance standards for the presentation of navigation-related
information on shipborne navigational displays
IMO Resolution MSC.302(87), Adoption of performance standards for Bridge Alert Management
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at http:// www .electropedia .org/
3.1
night vision equipment
technical fixed means enabling the position and aspect of objects above the water surface relative to one's
own craft to be detected at night
[SOURCE: IMO MSC.94(72) 4]
3.2
high-speed craft
HSC
0,1667
craft capable of a maximum speed in metres per second (m/s) equal to or exceeding 3,7V , where V
is the displacement corresponding to the design waterline
[SOURCE: IMO HSC Code 2000]
3.3
test target for sea trials
target that simulates the real hazard of a surface object that can be found at sea such as, small unlit boats,
floating logs, oil drums, containers, buoys, ice, hazardous waves and whales
[SOURCE: IMO MSC.94(72) 4]
3.4
lit vessel
vessel that, in addition to the standard navigation lights, has a row of five unshielded lamps with a
luminous flux of 460 lm at 1 m horizontal spacing and 4 m above sea level
Note 1 to entry: This is equivalent to e.g. 21 W, 12 V.
3.5
performance check
short functional test carried out during or after a technical test to confirm that the equipment operates
[SOURCE: IEC 60945:2002, 3.1.4]
3.6
performance check (EMC)
short functional test carried out during or after an EMC test to confirm that the equipment complies
with the required immunity performance criteria
[SOURCE: IEC 60945:2002, 3.1.5]
3.7
performance test
measurement or a group of measurements carried out during or after a technical test to confirm that
the equipment complies with selected parameters as defined in the equipment standard
[SOURCE: IEC 60945:2002, 3.1.6]
3.8
single operator action
procedure achieved by no more than one hard-key or soft-key action, excluding any necessary cursor
movements, or voice actuation using programmed codes
[SOURCE: MSC.252(83), Appendix 1]
3.9
field of view
FoV
solid angle through which a detector with mounted optic is sensitive to electromagnetic radiation
2 © ISO 2020 – All rights reserved
3.10
instantaneous field of view
iFoV
angle subtended by a single detector element on the axis of the optical system
Note 1 to entry: iFoV is used as measure of the spatial resolution of a remote sensing imaging system.
4 Performance requirements
4.1 Functions and their availability
[IMO MSC.94(72), 5.1] At night, night vision equipment shall be capable of detecting objects at least each
second above the water’s surface within a certain distance from one's own craft, and of displaying the
information pictorially in real time, at least each second, to assist in collision avoidance and safe navigation.
This requirement is fulfilled if the sea trials in 5.5 and the requirement in 4.4 are met.
4.2 Continuous operation
[IMO MSC.94(72), 5.2.1] Night vision equipment on board HSC, while navigating at sea, shall be capable of
continuous operation from after sunset until before sunrise. After the equipment has been switched on it
shall be operational in less than 15 minutes.
See 5.4.2.4.
4.3 Standard test target
[IMO MSC.94(72), 5.2.2] The standard test target shall be a black metal target of such a size that when at
least 50 % is immersed, 1,5 m long and 0,5 m high remains above the water at right angles to the desired
direction of detection. Administration may use other smaller targets to reflect local conditions.
See 5.5.2 for more detailed specification of the standard test target.
4.4 Detection range
[IMO MSC.94(72), 5.2.3] With the required field of view, the equipment shall detect the standard test
target at a distance of not less than 600 m with a minimum probability of 90 %, when the target has been
immersed in the sea for at least 24 hours under mean starlight conditions without clouds and without moon.
See 5.4.3.2, 5.4.4.5 and 5.5.4.2.
4.5 Field of view
[IMO MSC.94(72), 5.2.4] The required horizontal field of view shall be at least 20°, 10° on either side of the
bow. The vertical field of view shall be at least 12° and shall be sufficient to enable the equipment to fulfill
the performance requirements of MSC.94(72) as well as being able to see the horizon.
Optionally other fields of view may be provided. Their selection shall be made with a non‑locking switch,
which returns to the required field of view when released.
See 5.4.2.5.
4.6 Pan and tilt ranges of the field of view
[IMO MSC.94(72), 5.2.5] The axis of the field of view of the equipment shall be capable of being moved at
least 20° horizontally to either side.
The elevation axis of the field of view shall be capable of being adjusted of at least 10° to compensate for the
trim of the craft.
See 5.4.2.6.
4.7 Speeds of panning of the field of view
[IMO MSC.94(72), 5.2.6] By activation of a single control element, the axis of the field of view shall be
capable of being returned automatically to the ahead position at a minimum angular speed of 30°/s. The
system shall be capable of panning at a minimum angular speed of 30°/s.
The minimum angular speed shall be at least 30°/s. The operational angular speed may be lower.
See 5.4.2.6.
4.8 Stabilisation of the field of view against the motions of the vessel
The imaging system shall not show a shift of more than the instantaneous field of view (iFoV) (e.g. 0,83
mrad) when looking onto a fixed onshore target under ship's movement at sea. Ship movement at sea as
defined in 4.11.
See 5.2.3.
4.9 Heading marker indication
[IMO MSC.94(72), 5.2.7] When inside the field of view, the graphical ahead mark of the craft shall be
indicated on the display with an error not greater than ±1°.
When the sensor/camera is orientated right ahead, the graphical heading marker shall be displayed in
the centre with an error not greater than +/-1°.
When outside the field of view, a visual indication of relative bearing with an error not greater than ±1°
shall be provided.
See 5.4.2.6.
4.10 Clear view
[IMO MSC.94(72), 5.2.9] Arrangement shall be provided to ensure efficient cleaning of the sensor head/
lens from the operating position. Administration may require some additional facilities such as de-icing.
Essential cleaning of the sensor head and/or lens shall be performed before the use of the night vision
equipment. During operation, mainly dried salt mist and spray can occur that shall be removed by
a cleaning device to get back a clear view. The technical way how to achieve that result is left to the
discretion of the manufacturer of the device.
See 5.4.2.7.
4.11 Roll and pitch
[IMO MSC.94(72), 5.2.8] The performance of the night vision equipment shall be such that when the craft is
rolling and/or pitching up to ±10°, the performance requirements in this document shall be complied with.
See 5.2.3.
4.12 Optical interference
[IMO MSC.94(72), 5.2.10] Measures shall be taken, to ensure that objects commonly encountered at sea
and in ports shall not be displayed less clearly on the monitor of the night vision equipment because of
dazzle effects, reflection, blooming, or any other effects due to the surroundings.
4 © ISO 2020 – All rights reserved
See 5.2.4.
4.13 Line of sight
Vibrations shall not disturb the created image for the operator.
See 5.2.5.
4.14 Controls and ergonomics
[IMO MSC.94(72), 6] The night vision equipment shall be designed in accordance with sound ergonomic
principles.
The number of operational controls shall be limited to the minimum required for operation.
Whilst in operational mode, double functions of controls shall be avoided on such controls as for pan,
vertical trim, field of view and other essential functions.
The functions of the individual operational controls shall be clearly labelled.
The operational functions of night vision equipment shall be activated directly through the operational
controls; menu-driven controls shall be avoided.
The operational controls shall be clearly identifiable in the dark. If illumination is used, the brightness shall
be adjustable.
The operational controls of night vision equipment shall meet the requirements of IMO Resolution A.694(17)
as well as applicable requirements of IEC 60945 and IEC 60447.
4.15 Presentation of information
[IMO MSC.94(72), 6.3] the status of operation of the equipment shall be continuously displayed.
The display shall be non‑dazzling and non‑flickering. The display shall be capable of displaying a visible
image of at least 180 mm in diagonal.
The selected field of view, if more than one is provided, (see 4.5) shall be continuously indicated at the
operating position.
The image shall be presented on the display, with the same aspect ratio as the sensors, as default
(natural picture).
Any processing of the image on user demand is allowed as a temporary aid to enhance the detection of
objects. The fact that any processing is in operation shall be permanently indicated by means next to
the image. The navigation personnel shall be able to return to the unaltered image, only processed by
an automatic gain control algorithm, in a one-handed single operator action. The latency period of the
processing shall not exceed 250 ms. Unaltered means that only point operations which not consider the
pixels neighbourhood, are applied to the image raw data, such as contrast and brightness enhancement
or tone mapping.
Additional information may be displayed, but shall not mask, obscure or degrade essential information
required for the display by its primary task as specified in this document.
The refresh rate for an optical system shall be at least 60 Hz.
The presentation of navigation-related information on navigational displays shall be in accordance
with MSC.191(79) and IEC 62288.
See 5.4.2.2.
4.16 Software
[IMO MSC.94(72), 5.4] the operational characteristics of the software shall meet the following requirements
in particular:
[IMO MSC.94(72.), 5.4.1.1] self‑description of the functions implemented by means of software;
[IMO MSC.94(72), 5.4.1.2] display of user interface status; and
[IMO MSC.94(72), 5.4.1.3] software protection against unauthorized changes.
If certain functions of night vision equipment are implemented using software, such software shall meet the
applicable requirements of IEC 60945.
If any software is used, the manufacturer shall provide a description of the functions implemented by
means of software and state how the requirements have been complied with.
“Self-description of the functions implemented by means of software” means that the functions available
through menus (or similar) rather than separate controls shall be clear from the menu description.
“User interface status” may be an indicator of which functions are operational.
“Software protection” may be a password or lockable cover.
4.17 Durability and resistance to environmental conditions
[IMO MSC.94(72), 7.1] Night vision equipment shall withstand the environmental conditions specified in
IMO Resolution A.694(17) and in IEC 60945. Provisions shall be made, if necessary, to protect the night
vision equipment against high light conditions.
[IMO MSC.94(72), 7.4.5] Night vision equipment should be installed in such a way that its operation and
detection functions are not impaired by head wind and/or true wind up to 100 knots
In addition to the requirements in IEC 60945 Durability and resistance to environmental conditions,
the sensor of the night vision equipment and its mounting requires an additional shock/vibration test
as well as wind endurance test (IEC 62388). The shock test provides a simulation in which the resonant
responses, comparable with those likely to be experienced in practice in the operational environment,
can be reproduced in the test laboratory.
See 5.4.2.1. and 5.4.2.8
4.18 Electrical and electromagnetic interference
[IMO MSC.94(72), 7.2] With respect to electrical and electromagnetic interference, night vision equipment
shall meet the requirements of IMO Resolution A.694(17) and IEC 60945.
See 5.4.2.1.
4.19 Power supply
[IMO MSC.94(72), 7.3] The power supply of night vision equipment shall meet the requirements of IMO
Resolution A.694(17) and IEC 60945.
See 5.4.2.1.
4.20 Back up and fall back arrangements
[IMO MSC.94(72), 9] In the event of failure of the pan-tilt device, the sensor shall be capable of being fixed
in the ahead position while underway.
6 © ISO 2020 – All rights reserved
4.21 Malfunctions, alerts and indications
[IMO MSC.94(72), 5.3] The night vision equipment shall include a visual indication of any failure.
A warning of category B according to IMO Resolution MSC.302(87) shall be provided on the following
conditions:
— malfunction of the night vision equipment or failure of power supply, see 4.19;
— malfunction of pan-tilt device, see 4.6;
— malfunction of zoom and focus.
An alert output shall be provided for any alert conditions.
The alert shall conform to the presentation and handling requirements of IMO Res. MSC.302(87) and
IEC 62923.
4.22 Interfacing
[IMO MSC.94(72), 8] Interfaces with other radio and navigation equipment shall meet IEC 61162. A
recognized international standard video output for image recording shall be provided.
The talker identifier to be used is "NV".
The following sentences shall be provided for the alert communication interface.
Sentences transmitted by the night vision equipment:
— ALC, ALF, ARC, HBT: see IEC 61162-1.
Sentences received by the night vision equipment:
— ACN, HBT: see IEC 61162-1.
NOTE ALR and ACK can be implemented if needed for legacy VDR equipment.
See 5.3.
4.23 Safety precautions
[IMO MSC.94(72), 10] The safety features of night vision equipment shall meet the requirements of IMO
Resolution A.694(17) and IEC 60945.
See 5.4.2.1.
4.24 Acoustic noise and signals
Acoustic noise and signals shall meet the requirements of IEC 60945.
See 5.4.2.1.
4.25 Compass safe distance
Compass safe distance shall be determined according to IEC 60945 and the device shall be marked
accordingly.
See 5.4.2.1.
4.26 Active illumination for active image intensifier system
Any system using active image-intensifier systems shall ensure good conditions of operation for all
common traffic and weather conditions. An active IR illumination or any alternative technology is
acceptable.
5 Methods of testing and required test results
5.1 General test conditions
5.1.1 General
Environmental and safety tests shall be carried out first, followed by laboratory tests and sea trials to
verify whether the same equipment under test (EUT) meets all technical requirements. Where electrical
tests are required, they shall be carried out using the normal test voltage as specified in IEC 60945.
Requirements detailed in Clause 4 for which a specific test is not detailed shall be confirmed by a visual
check of the equipment and/or documentation.
5.1.2 Performance test
The performance test shall confirm that the EUT complies with the following selected parameters:
a) detection range: 600 m, test according to ISO 15529 and ISO 9335 (see requirement in 4.4);
b) stabilisation test to meet 4.8, test according to 5.4.2.5;
c) motion test conditions shall be at least 20° horizontal to either side and at least 10° vertical interval,
the EUT shall be capable of being returned automatically to the ahead position at a minimum
angular speed of 30°/s. The system shall be capable of panning at a minimum angular speed of
30°/s (see requirements in 4.6 and 4.7).
5.1.3 Performance check
The performance check shall verify that the EUT is still operational during or after being subjected to
the environmental tests and any other test where it is specified.
The performance check shall ensure that the EUT shows:
a) pan and tilt motion;
b) display operation.
5.1.4 Performance check (EMC)
The EUT shall show no deterioration of the image when exposed to radiation.
5.2 Environmental tests
5.2.1 General
Environmental tests are intended to assess the suitability of the construction of the EUT for its intended
physical conditions of use. After each environmental test and, if specified, also during the test, the EUT
shall comply with the requirements of a performance check and/or performance test. No preconditioning
of the equipment shall be necessary. The performance test in 5.1.2 a), b), and c) shall apply.
Night vision equipment shall, as far as applicable, meet the requirements and pass the tests according
to IEC 60945, Durability and resistance to environmental conditions.
8 © ISO 2020 – All rights reserved
Outside mounted camera equipment is categorized as "exposed" equipment according to IEC 60945.
The remaining equipment installed on the navigation bridge is categorized as "protected".
The exposed part of the equipment is required to function only during the night. Therefore, the solar
gain of 23 °C does not need to be applied for the functional dry heat test; i.e. the chamber temperature
can be decreased during the performance test. The performance test shall be started after the EUT has
reached a steady temperature.
The test “Corrosion (salt mist)” according to IEC 60945 is mandatory, and shall not be waived.
5.2.2 Sensor shock test
5.2.2.1 General
The sensor and its mounting shall be designed to withstand the test without external indications of
damage or subsequent degradation in performance. A performance check (see 5.1.3) shall be carried
out before and after the test.
5.2.2.2 Procedure
The sensor and mount provided with the EUT shall be mounted so that a shock can be applied to the
sensor mounting base to simulate an upward vertical impulsive force. The sensor shall be mechanically
connected to the shock machine by its normal means of attachment. The procedure shall be carried
out in normal laboratory environmental conditions. The severity of the test is specified by the peak
acceleration, pulse shape and duration given in Table 1. The shock pulse shall be measured by an
accelerometer placed at the sensor fixing point nearest to the centre of the table surface.
Table 1 — Sensor shock test
Pulse shape Peak acceleration Duration
Half sine 100 m/s 25 ms
NOTE The test is harmonized with those specified in IEC 62388:2013.
5.2.2.3 Methods of testing and required results
Confirm by observation that after three successive upward shocks of the required test severity and
pulse shape have been applied and the power supply is switched off, there is no external indication of
physical damage.
5.2.3 Roll and pitch test
This test is intended to prove the ruggedness of the system under the ship motions of 4.11.
The sensor and mount shall be mounted on top of a motion simulation platform being excited with
a defined mechanical excitation, resembling a HSC in motion (e.g. a Scorsby table). It shall be aligned
to within ± 1° of the table roll axis. The following nominal simple harmonic motions shall be applied
simultaneously to the roll and pitch axes of the table for 25 min:
+°2
— roll axis: peak amplitude 10° , period 15 s ± 1 s;
−°0
+°2
— pitch axis: peak amplitude 10° , period 6 s ± 1 s.
−°0
During the roll and pitch test, the EUT shall be subjected to the performance test specified in 5.1.2 b) to
demonstrate the stabilisation of the iFoV.
At the end of 25 min, the table motion shall be stopped, the table returned to its original position and
the EUT shall continue to operate without interference.
NOTE The lengths of period are harmonized with those specified in ISO 16328.
5.2.4 Optical interference test
The EUT shall meet the requirements of 4.12 when tested in accordance with 5.4 and 5.5.4.3.
5.2.5 Line of sight test
The camera shall be exposed to the following vibration:
— 2 Hz up to 15 Hz with an excursion of ± 2,5 mm ± 10 %;
— above 15 Hz up to 50 Hz with a constant maximum acceleration of 23 m/s .
If the test is performed as a sweep test, the sweep rate should be selected according to IEC 60945.
During the line of sight test, the EUT shall be subject to the performance test specified in 5.1.2 b).
5.3 Interface test
Interfaces shall be tested according to IEC 61162.
5.4 Further laboratory tests
5.4.1 General
Laboratory tests shall be performed with the EUT which has passed the environmental tests
specified in 5.2.
Tests shall be performed to verify the requirements given in Clause 4, except 4.3 and 4.4. The requirement
given in 4.2 may alternatively be verified at the sea trials. The test results shall be documented.
The purpose of the following technical tests is to provide a means of performing laboratory controlled
tests on all types of night vision equipment. The results of these tests shall be used to compare the
measured performance to pre-established standards that have been validated via at-sea tests to meet
the navigational needs for night navigation of HSCs.
The laboratory tests have been developed to measure the various capabilities of the EUT, including
man-machine interfaces, displays, mechanical operation, and sensor.
The methods and procedures of the laboratory tests have been derived so that, when the results are
compared to previous test results, they reliably predict the at-sea performance of the system.
5.4.2 Test for all types of night vision equipment
5.4.2.1 General
Night vision equipment shall, as far as applicable, meet the requirements and pass the tests according
to IEC 60945, Ergonomics and HMI, Software, Power supply, Electromagnetic emission, Immunity
to electromagnetic environment, Acoustic noise and signals, Compass safe distance and Safety
precautions.
5.4.2.2 Presentation of information
The requirements regarding presentation of information shall be tested according to IEC 62288
presentation of operational information.
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5.4.2.3 Back up and fall back arrangements
The requirements regarding back up and fall back arrangements shall be tested by visual inspection.
5.4.2.4 Continuous operation test
The EUT shall be switched on and it shall be observed whether it is operational within 15 min.
See 4.2.
5.4.2.5 Field of view test
Generate the real field of view (FoV) using the test pattern defined in Annex E for thermal imaging
systems.
For active image-intensifier systems, Annex F defines a setup.
Confirm whether the FoV of the EUT meets the requirements as specified in 4.5.
Note The field of view test is used to demonstrate stabilisation of the reproduction of the image for the
vessel condition roll and pitch (5.2.3) as well for the vibration (5.2.5).
5.4.2.6 Pan and tilt ranges as well as speeds of panning of the field of view test, and heading
marker indication test
a) Confirm that a heading marker is indicated on the display, see 4.9.
b) Move the camera/sensor in the right ahead position. Verify that the graphical heading marker is
displayed in the centre of the displayed picture with an error not greater than +/-1°, see 4
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