1、BRITISH STANDARDBS ISO 20672:2007Ships and marine technology Rate of turn indicators ICS 47.020.70g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g53g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58In
2、corporating corrigendumSeptember 2008National forewordThis British Standard is the UK implementation of ISO 20672:2007, incorporating corrigendum September 2008. The UK participation in its preparation was entrusted to Technical Committee EPL/80, Maritime navigation and radiocommunication equipment
3、and systems. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer
4、 immunity from legal obligations. BS ISO 20672:2007This British Standard was published under the authority of the Standards Policy and Strategy Committee on 29 June 2007 BSI 2009Amendments/corrigenda issued since publicationDate Comments 31 October 2009 Implementation of ISO corrigendum September 20
5、08. Amendement to title and text of subclause 6.5ISBN 978 0 580 61301 2Reference numberISO 20672:2007(E)INTERNATIONAL STANDARDISO20672First edition2007-05-15Ships and marine technology Rate of turn indicators Navires et technologie maritime Frquence des indicateurs de direction BS ISO 20672:2007iiii
6、iContents PageForeword iv1 Scope . 12 Normative references . 13 Terms and definitions. 14 Construction 24.1 Indication . 24.2 Range scales . 24.3 Illumination and lighting 34.4 Type of indicator . 35 Performance requirements 35.1 Accuracy 35.2 Operation . 45.3 Insulation resistance and high voltage
7、46 Methods of testing and required test results. 46.1 Construction 46.2 Environmental tests 46.3 Accuracy test 46.4 Operation test 56.5 Insulation resistance and high voltage test. 57 Interface . 58 Marking and identification . 59 Information 5Bibliography . 6BS ISO 20672:2007ivForeword ISO (the Int
8、ernational 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 ha
9、s 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
10、standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodie
11、s for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. 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 o
12、r all such patent rights. ISO 20672 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee SC 6, Navigation.BS ISO 20672:20071Ships and marine technology Rate of turn indicators 1 Scope This International Standard specifies the construction, performance requirements,
13、 methods of testing and required test results for the rate of turn indicators required by clause 2.9.1, Regulation 19, chapter V, SOLAS 1974 (as amended, 2000). It is based upon the requirements of IMO Resolution A.526(13), and is also associated with IMO Resolution A.694 (17) and IEC 60945. Where a
14、 requirement in this International Standard is different from that in IEC 60945, the requirement in this International Standard takes precedence. NOTE 1 All requirements that are extracted from the recommendations of IMO Resolution A.526(13) on performance standards for rate of turn indicators are p
15、rinted in italics and the resolution and paragraph numbers are indicated in brackets. NOTE 2 The rate of turn indicators specified in IMO Resolution A.526(13) may be self-contained; alternatively it may form part of, or derive information from, any other appropriate equipment. In order to define the
16、 minimum requirements about the rate of turn indicators specified in IMO Resolution A.526(13), this International Standard specifies it may form part of, or derive information from, any other appropriate equipment. 2 Normative references The following referenced documents are indispensable for the a
17、pplication 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. IEC 60945, Marine navigation and radiocommunication equipment and systems General requirements Methods of testi
18、ng and required test resultsIEC 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
19、listeners, high-speed transmission IMO Resolution A.526(13), Performance standards for rate-of-turn indicators3 Terms and definitions For the purposes of this document, the following terms and definitions apply. BS ISO 20672:200723.1rate of turn indicator indicator capable of indicating rates of tur
20、n in degrees per minute to starboard and to port of the ship to which it is fittedNOTE 1 A rate of turn indicator may be self-contained; alternatively it may form part of, or derive information from, any other appropriate equipment.NOTE 2 Based on IMO Resolution A.526(13)/2.1 and 2.2. 3.2analog type
21、 indicator indicator that shows the rate of turn in a continuous way, such as by means of an arrow pointer and graduated scale 3.3digital type indicator indicator that shows the rate of turn in a discrete, alphanumeric way 3.4full scale from 0 per minute to the greatest angular rate scale of port (o
22、r starboard) direction 4 Construction The rate of turn indicators shall conform to the following requirements. 4.1 Indication 4.1.1 The indication required shall be provided by a centre-zero analogue type indicator (preferably circular). Where a circular scale indicator is used, the zero shall be up
23、permost. A.526(13)/2.3.1 4.1.2 A turn of ship to port shall be indicated on the left of the zero point and a starboard turn to the right of the zero point. If the actual rate of turn exceeds full scale deflection, this shall be clearly indicated on the display. A.526(13)/2.3.2 4.1.3 In addition, an
24、alphanumeric display may be provided. Positive indication of port and starboard shall be provided on such displays. A.526(13)/2.3.3 4.1.4 The length of scale in either direction from zero shall not be less than 120 mm. The sensitivity of the system shall ensure that a change in the rate of turn of 1
25、 per minute is represented by a distance of not less than 4 mm on its scale. A.526(13)/2.3.4 4.2 Range scales 4.2.1 A linear range scale of not less than r 30 per minute shall be provided. The scale for 30 per minute indicator shall be marked in intervals of 1 per minute on both sides of zero. The s
26、cale shall be marked with figures every 10 per minute. Every 10 mark shall be significantly longer than the 5 mark which in turn shall BS ISO 20672:20073be significantly longer than the 1 mark. The marks and figures shall preferably be red or a light colour on a dark background. A.526(13)/2.4.1 4.2.
27、2 Additional linear range scales of r 120 and r 300 per minute may be provided and the scale andfigures of each range shall be marked in intervals proportionate to the 30 per minutes indicator as defined in 4.2.1 (see Table 1). A.526(13)/2.4.2 Table 1 Scaling reference Scale Numerical mark Short mar
28、k Half mark Longer mark 30 0, 10, 20, 30 every 1 deg every 5 deg every 10 deg 120 0, 40, 80, 120 every 4 deg every 20 deg every 40 deg 300 0, 100, 200, 300 every 10 deg every 50 deg every 100 deg Any other range scale may be acceptable under approval by the appropriate authority. 4.3 Illumination an
29、d lighting The illumination and lighting of the indicator shall be arranged in order not to hinder an operators vision at night and in order to make the scale, pointer and letters as equally visible as possible even in dim light or darkness. 4.4 Type of indicator The rate of turn indicator shall be
30、an analog type. A digital type indicator may additionally be used, if fitted. 5 Performance requirements 5.1 Accuracy 5.1.1 The indicated rate of turn shall not deviate from the actual rate of turn of the ship by more than 0,5 per minute plus 5 per cent of the indicated rate of turn of the ship. The
31、se values include the influence of earth rate.A.526(13)/2.5.1 5.1.2 Periodic rolling motion of the ship with an amplitude of r 5 and period of up to 25 seconds and periodic pitching motion with an amplitude of r 1 and period of up to 20 seconds shall not change the mean value of the indicated rate o
32、f turn by more than r 0,5 per minute. A.526(13)/2.5.2 5.1.3 A rate of turn indicator shall meet these accuracy requirements at all ship speeds up to 30 knots. A.526(13)/2.5.3 5.1.4 The damping of the rate of turn indicators shall be provided with a time constant which may be varied during operation
33、in the range zero to at least 10 seconds. A.526(13)/2.4.3 BS ISO 20672:200745.2 Operation 5.2.1 A rate of turn indicator shall be ready for operation and comply with this International Standard within 4 minutes of being switched on.A.526(13)/3.1 5.2.2 The design shall be such that whether operating
34、or not the rate of turn indicator will not degrade the performance of any other equipment to which it is connected. A.526(13)/3.2 5.2.3 The rate of turn indicator shall include a means of enabling the operator to verify that it is operating. A.526(13)/3.3 5.3 Insulation resistance and high voltage W
35、hen insulation resistance and high voltage tests are to be carried out, IEC 60092-504 may be applied. 6 Methods of testing and required test results 6.1 Construction The construction of the rate of turn indicator shall comply with the requirements specified in Clause 4. 6.2 Environmental tests Unles
36、s otherwise stated in this International Standard, all the tests shall be carried out according to the requirements of IEC 60945. The manufacturer shall determine which components of the rate of turn indicators will be protected or exposed, as defined in IEC 60945. 6.3 Accuracy test 6.3.1 The follow
37、ing tests shall satisfy the accuracy requirements of 5.1.1. The indicated rate of turn is tested with a dummy signal or internal sensor signal in accordance with 6.3.2, 6.3.3 and 6.3.4. 6.3.2 Rate of turn indicators shall be set on a test table and tested with a dummy signal or internal sensor signa
38、l under one of following conditions: a) r 30/min indicator: pitch axis 1, period 20 s; roll axis 5, period 25 s; b) r 120/min indicator: pitch axis 1, period 6 s; roll axis 5, period 15 s; c) r 300/min indicator: pitch axis 1, period 6 s; roll axis 5, period 15 s. Indicator data shall be taken at 10
39、 s intervals for a period of 10 min. The resultant mean value of the indicated rate of turn shall meet the requirement of 5.1.2. 6.3.3 The rate of turn indicator shall be tested for consistency at simulated ship speeds up to 30 knots using a dummy signal or internal sensor signal which contains the
40、ships speed factors. 6.3.4 Damping of the rate of turn indicator shall be tested in response to a step-shaped dummy signal or internal sensor signal. The signal may be adjusted to have time constant range of zero to 10 s. BS ISO 20672:200756.4 Operation test The operation test shall be carried out i
41、n accordance with 5.2 and shall satisfy the requirements specified therein. 6.5 Insulation resistance and high voltage test The insulation resistance and high voltage test shall be carried out in accordance with 5.3 and shall satisfy therequirements specified therein. 7 Interface If the rate of turn
42、 indicator provides an interface facility, it shall meet the requirements laid down in IEC 61162-1 and IEC 61162-2. 8 Marking and identification Each unit of a rate of turn indicator shall be marked with the following: identification of the manufacturer; equipment type number or model identification
43、 number under which it was type tested; serial number of the unit. Each unit shall be marked with the minimum safe distance from a magnetic compass (for bridge installation). The safe distance shall be measured in accordance with IEC 60945. 9 Information The manufacturer shall provide adequate equip
44、ment documentation to enable competent members of a ships crew to operate and maintain the equipment efficiently. BS ISO 20672:20076Bibliography 1 ISO 8468, Ships and marine technology Ships bridge layout and associated equipment Requirements and guidelines2 IEC 60092-504, Electrical installations i
45、n ships Part 504: Special features Control and instrumentation3 International Convention for the Safety of Life at Sea (SOLAS), 1974 (amended) 4 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 aidsBS ISO 20672:2007blankD “ ?“ ()*+,-.,/0014,.23()*+,-.,/0014,8“(“ “ 9 “ “ 7 (; “;762 “ (; “ ! & & 3 “ ! &A 5 ? 80/ 3 “ & “ “ “ “
