ISO/PAS 19697:2014
(Main)Ships and marine technology — Navigation and ship operations — Electronic inclinometers
Ships and marine technology — Navigation and ship operations — Electronic inclinometers
ISO/PAS 19697:2014 specifies the performance requirements, methods of testing, and test results of electronic inclinometers required by the performance standard, IMO resolution MSC.363 (92) in addition to the general requirements contained in resolution A.694 (17) and is associated with IEC 60945. The electronic inclinometers provide information about actual heel angle, roll amplitude, roll period to support decision-making process on board in order to avoid dangerous situations as well as to assist in maritime casualty investigation. The electronic inclinometers are mainly composed of a set of sensors, a signal processor, a display, an input device, and an interface to other systems. It does not apply to the electronic inclinometers installed for purposes which are outside the scope of ISO/PAS 19697:2014, e.g. monitoring of cargo status.
Navires et technologie maritime — Navigation et opérations maritimes — Inclinomètres électroniques
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Standards Content (Sample)
PUBLICLY ISO/PAS
AVAILABLE 19697
SPECIFICATION
First edition
2014-12-15
Ships and marine technology —
Navigation and ship operations —
Electronic inclinometers
Navires et technologie maritime — Navigation et opérations
maritimes — Inclinomètres électroniques
Reference number
ISO/PAS 19697:2014(E)
©
ISO 2014
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ISO/PAS 19697:2014(E)
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ISO/PAS 19697:2014(E)
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Requirements . 2
4.1 General . 2
4.2 Functionality . 3
4.3 Information . 3
4.3.1 Actual heel angle and roll amplitude . 3
4.3.2 Roll period . 3
4.3.3 Roll peak hold value . 3
4.4 Display . 3
4.5 Status indication . 4
4.6 Alert . 4
4.6.1 Operational alert . 4
4.6.2 Functional alert . 5
4.7 Interface . 5
4.8 Continuous operation . 5
4.9 Power supply . 6
5 Accuracy . 6
5.1 Actual heel angle, roll amplitude, and roll period . 6
5.2 Acceleration condition . 6
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ISO/PAS 19697:2014(E)
6 Test methods and required results . 6
6.1 General . 6
6.2 Static actual heel angle test . 6
6.2.1 Method of testing . 6
6.2.2 Required test result . 6
6.3 Dynamic actual heel angle test . 7
6.3.1 Method of testing . 7
6.3.2 Required test result . 7
6.4 Long term actual heel angle test . 7
6.4.1 Method of testing . 7
6.4.2 Required test result . 7
6.5 Roll period test . 7
6.5.1 Method of testing . 7
6.5.2 Required test result . 8
6.6 Connections to other equipment test . 8
6.6.1 Method of testing . 8
6.6.2 Required test result . 8
6.7 Display test . 8
6.7.1 Method of testing . 8
6.7.2 Required test results . 8
6.8 Status indication test .10
6.8.1 Method of testing .10
6.8.2 Required test results .10
6.9 Operational alert test .10
6.9.1 Method of testing .10
6.9.2 Required test results .11
6.10 Functional alert test .11
6.10.1 Method of testing .11
6.10.2 Required test results .12
6.11 The roll peak hold value test .12
6.11.1 Method of testing .12
6.11.2 Required test results .12
6.12 The reset function of roll peak hold value test .12
6.12.1 Method of testing .12
6.12.2 Required test results .13
6.13 Power supply test .13
7 Installation position.13
8 Information .13
Annex A (informative) Relation between transverse metacentric stability and measured
natural roll period of ships in wave .14
Annex B (informative) Test facility type test methodology .17
Bibliography .19
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ISO/PAS 19697:2014(E)
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 on the meaning of ISO specific terms and expressions related to conformity
assessment, as well as information about ISO’s adherence to the WTO principles in the Technical Barriers
to Trade (TBT) see the following URL: Foreword - Supplementary information
The committee responsible for this document is ISO/TC 8, Ships and marine technology, Subcommittee
SC 6, Navigation and ship operations.
Annex A is for information only and Annex B forms detailed test methods.
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ISO/PAS 19697:2014(E)
Introduction
An electronic inclinometer is an electronic device that provides information about roll period, roll
amplitude, and heel angle of the ship. Electronic inclinometers are intended to support decision-
making processes on board in order to avoid dangerous situations as well as assist in maritime casualty
investigation. The requirements in this Publicly Available Specification take into account human factors,
ergonomic principles, and advances in technology.
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PUBLICLY AVAILABLE SPECIFICATION ISO/PAS 19697:2014(E)
Ships and marine technology — Navigation and ship
operations — Electronic inclinometers
1 Scope
This Publicly Available Specification specifies the performance requirements, methods of testing, and test
results of electronic inclinometers required by the performance standard, IMO resolution MSC.363 (92) in
addition to the general requirements contained in resolution A.694 (17) and is associated with IEC 60945.
The electronic inclinometers provide information about actual heel angle, roll amplitude, roll period to
support decision-making process on board in order to avoid dangerous situations as well as to assist in
maritime casualty investigation. The electronic inclinometers are mainly composed of a set of sensors,
a signal processor, a display, an input device, and an interface to other systems.
It does not apply to the electronic inclinometers installed for purposes, which are outside the scope of
this Publicly Available Specification, e.g. monitoring of cargo status.
Where a requirement in this Publicly Available Specification is different from IEC 60945, the requirement
in this Publicly Available Specification takes precedence.
NOTE All requirements that are extracted from the recommendations of IMO Resolution MSC.363 (92),
performance standards for electronic inclinometers, are printed in italics and the resolution and paragraph
numbers are indicated in brackets.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
IEC 60945, Maritime navigation and radiocommunication equipment and systems — General requirements —
Methods of testing and required test results
IEC 61162-1, Maritime navigation and radiocommunication equipment and systems — Digital interfaces —
Part 1: Single talker and multiple listeners
IEC 61162-2, Maritime navigation and radiocommunication equipment and systems — Digital interfaces —
Part 2: Single talker and multiple listeners, high-speed transmission
IEC 61162-3, Maritime navigation and radiocommunication equipment and systems — Digital interfaces —
Part 3: Serial data instrument network
IEC 61162-450, Maritime navigation and radiocommunication equipment and systems — Digital interfaces
— Part 450: Multiple talkers and multiple listeners — Ethernet interconnection
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
actual heel angle
momentary angle of roll referenced to a levelled ship to port or starboard side
[SOURCE: IMO MSC.363 (92) Paragraph 3.1]
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ISO/PAS 19697:2014(E)
3.2
analogue type display
display that shows actual heel angle, roll amplitudes, and roll peak hold values in a continuous way, such
as by means of an arrow pointer and graduated scale
3.3
digital type display
display that shows actual heel angle, roll amplitudes, and roll peak hold values in the form of numbers
3.4
display
means by which the roll behaviour of the ship and the state of the electronic inclinometer system is
presented to an observer
3.5
inspection equipment
equipment for testing the performance of the electronic inclinometer
3.6
reset function for roll peak hold value
function for resetting roll peak hold values to zero and for recording reset date [month, day, and
year] and time
3.7
roll amplitude
maximum values of heel angle to port or starboard side
[SOURCE: IMO MSC.363 (92) Paragraph 3.1]
3.8
roll period
time between two successive maximum values of heel angle on the same side of the ship
[SOURCE: IMO MSC.363 (92) Paragraph 3.1]
3.9
roll peak hold value
maximum values of roll amplitude to port or starboard side from the last reset
3.10
rolling
motion around the longitudinal axis of the ship
Note 1 to entry: Positive roll is starboard down.
[SOURCE: IMO MSC.363 (92) Paragraph 3.1]
3.11
zero crossing method
zero crossing method is the way for measuring wave period by using a zero crossing which is a point
where the sign of a measured value (roll angle) changes (e.g. from positive to negative)
4 Requirements
4.1 General
Users of this Publicly Available Specification shall note that while attempting to implement the
requirements, they shall ensure compliance with such statutory requirements, rules, and regulations so
as to be applicable to the individual ship concerned.
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ISO/PAS 19697:2014(E)
4.2 Functionality
[IMO MSC.363 (92) Paragraph 1.2] The electronic inclinometers shall in a reliable form
a) determine the actual heel angle with the required accuracy,
b) determine the roll amplitude with the required accuracy,
c) determine the roll period with the required accuracy,
d) present the information on a bridge display, and
e) provide a standardized interface to instantaneous heel angle to the voyage data recorder (VDR).
4.3 Information
4.3.1 Actual heel angle and roll amplitude
[IMO MSC.363 (92) Paragraph 4] Electronic inclinometers shall be capable of measuring the actual heel
angle and determining the amplitude of the rolling oscillation of the ship over a range of ±90 degrees.
4.3.2 Roll period
[IMO MSC.363 (92) Paragraph 5] Electronic inclinometers shall be capable of measuring the time between the
maximum values of the rolling oscillation and determining the roll period over a minimum range of 4 to 40 s.
If enough precision is not attained, the period may be measured by the “zero crossing method”.
4.3.3 Roll peak hold value
Electronic inclinometers may optionally record the roll peak hold values on both sides and present them
on any kind of display.
If optional recording of the roll peak hold values is provided, electronic inclinometers shall have a mean
of manually resetting the roll peak hold values by a single operator action.
If necessary, the following sentences may be provided for the reset of roll peak hold value:
$–TXT,01,01,01,EI_RPHVReset_yyyy_mm_dd_oo_nn_ss*hh < CR > < LF > (see IEC 61162-1)
where:
— “yyyy” is reset year.
— “mm” is reset month.
— “dd” is reset day.
— “oo” is reset hour.
— “nn” is reset minute.
— “ss” is reset second, and
— “hh” is check sum.
— TXT (See IEC 61162-1).
4.4 Display
[IMO MSC.363 (92) Paragraph 7.2] The actual heel angle to port or starboard shall be indicated in an
analogue form between the limits of ±45 degrees.
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ISO/PAS 19697:2014(E)
[IMO MSC.363 (92) Paragraph 7.1.2] Electronic inclinometers shall display the roll amplitude to both port
and starboard side with a minimum resolution of one degree.
Electronic inclinometers may optionally display the roll peak hold value for both sides, port and
starboard, with a minimum resolution of one degree and its reset date/time.
[IMO MSC.363 (92) Paragraph 7.1.1] Electronic inclinometers shall display the latest roll period with a
minimum resolution of 1 s.
[IMO MSC.363 (92) Paragraph 7.3] The display may be implemented as a dedicated display or integrated
into other bridge systems.
4.5 Status indication
The electronic inclinometer system shall include status indications that include, but are not limited to
the following:
a) that power is available to the system,
b) that the system is switched on and is ready to use,
c) that the system is switched on but there is a fault on one (or more) sensor(s), and
d) that the system has recorded a measurement of heel angle exceeding a pre-set threshold value.
4.6 Alert
4.6.1 Operational alert
[IMO MSC.363 (92) Paragraph 8.2] Electronic inclinometers may optionally provide a warning for indicating
that a set heel angle had been exceeded.
Electronic inclinometers that include a heel angle warning function shall have a method of resetting the
warning.
Electronic inclinometers that include a heel angle warning function shall have a method of manually
setting the threshold value of heel angle.
The operational alert function shall provide display of the warning and may optionally provide the
warning by audible and/or visible means.
The inclinometer system should be capable of supporting an interface with a centralized alarm
management system.
ALF sentence is used to initiate a warning on other bridge systems when the actual heel angle exceeds
the pre-set threshold.
The following sentences shall be provided for the alert communications interface:
Sentences transmitted by the electronic inclinometers
— ALF and ACN (See IEC 61924-2)
Sentences received by the electronic inclinometers
— ACN (See IEC 61924-2)
The following sentence may be provided for the input of a threshold value of heel angle:
$–TXT,01,01,01,EI_RollThresholdAngle_xx_deg *hh < CR > < LF >
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ISO/PAS 19697:2014(E)
where:
— “xx” is the threshold value of heel angle, and
— “hh” is check sum.
— TXT (See IEC 61162-1).
4.6.2 Functional alert
[IMO MSC.363 (92) Paragraph 9.1] Electronic inclinometers shall internally check and indicate to the user
if all components are operative and if the information provided is valid or not.
[IMO MSC.363 (92) Paragraph 10.2] Electronic inclinometers shall have a bidirectional interface to
facilitate communication, to transfer alerts from inclinometers to external systems, and to acknowledge
and silence alerts from external systems.
An alert shall be provided and be output on the following conditions:
— malfunction of the electronic inclinometer sensor(s),
— failure of the power supply,
— failure of the interface with other important systems (VDR, INS, Alarm management system, etc.), and
— heel angle information displayed is invalid.
The alert shall conform to the presentation and handling requirements of Bridge Alert Management
[IMO Res. MSC.302 (87)]. When an Integrated Navigation System (INS) is fitted, a suitable interface shall
be provided for alert communications with an Integrated Navigation System [IMO Res. MSC.252 (83)
and IEC 61924-2].
The following sentences shall be provided for the alert communications interface:
Sentences transmitted by the electronic inclinometers
— HBT (See IEC 61162-1)
— ALC, ALF, and ACN (See IEC 61924-2)
Sentences received by the electronic inclinometers
— HBT (See IEC 61162-1)
— ACN (See IEC 61924-2)
4.7 Interface
[IMO MSC.363 (92) Paragraph 10.1] Electronic inclinometers shall comprise a digital interface providing
actual heel angle information to other systems like, e.g. the voyage data recorder (VDR), with an update
rate of at least 5 Hz. Electronic inclinometers shall also comprise a digital interface providing the displayed
information of roll period and roll amplitude (see 4.3).
[IMO MSC.363 (92) Paragraph 10.3] The digital interface shall comply with the relevant International
Standards IEC 61162-1 and, IEC 61162-2 or IEC 61162-450 or IEC 61162-3 as amended.
4.8 Continuous operation
The equipment shall be capable of continuous operation under conditions of vibration, humidity, change
of temperature, and variations of the power supply, as described in IEC 60945.
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ISO/PAS 19697:2014(E)
4.9 Power supply
[IMO MSC.363 (92) Paragraph 12] Electronic inclinometers shall be powered from the ship’s main source
of electrical energy. In addition, it shall be possible to operate the electronic inclinometers from the ship’s
emergency source of electrical energy.
5 Accuracy
5.1 Actual heel angle, roll amplitude, and roll period
[IMO MSC.363 (92) Paragraph 6.1] Electronic inclinometers shall provide the data with sufficient accuracy
for a proper assessment of the ships dynamic situation. Minimum accuracy of the measurements shall be
5 % of reading or ±1 degree whichever is the greater for angle measurements and 5 % of reading or ±1 s,
whichever is the greater for time measurements.
5.2 Acceleration condition
[IMO MSC.363 (92) Paragraph 6.2] Actual heel angle and time measurement accuracy shall not be unduly
affected by other linear or rotational movements of the ship (as e.g. surging, swaying, heaving, pitching,
yawing) or by transverse acceleration ranging from −0,8 g to +0,8 g.
The required acceleration condition, 0,8 g, includes the component of the gravitational acceleration.
6 Test methods and required results
6.1 General
Unless otherwise stated in this Publicly Available Specification, the requirements of IEC 60945 shall
apply to the electronic inclinometer. To ease the term, EUT (equipment under test) will be used to
describe an electronic inclinometer system being tested.
The test arrangement shall consist of the following:
— movable arm which enables rotation of the EUT sensor from the zero degree roll angle position
(upright) to the maximum roll angle position (90 degrees) to both starboard and port sides,
— display representing other bridge equipment with which the EUT may communicate, and
— method of generating and transmitting to the EUT recognized NMEA
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