《BS-EN-ISO-8728-1999.pdf》由会员分享，可在线阅读，更多相关《BS-EN-ISO-8728-1999.pdf（16页珍藏版）》请在三一文库上搜索。
1、BRITISH STANDARD BS EN ISO 8728:1999 Ships and marine technology Marine gyro-compasses The European Standard EN ISO 8728:1998 has the status of a British Standard ICS 47.020.70 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 8728:1
2、999 This British Standard, having been prepared under the direction of the Electrotechnical Sector Committee, was published under the authority of the Standards Committee and comes into effect on 15 March 1999 BSI 06-1999 ISBN 0 580 32226 2 National foreword This British Standard is the English lang
3、uage version of EN ISO 8728:1998. It is identical with ISO 8728:1997. It supersedes BS EN ISO 8728:1995 which will be withdrawn on 30th June 1999. The UK participation in its preparation was entrusted to Technical Committee EPL/80, Maritime navigation and radiocommunication equipment and systems, wh
4、ich has the responsibility to: aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate th
5、em in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC standards normally include an annex which lists normative references to international publications with their correspo
6、nding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards Electronic Catal
7、ogue. A British Standard does not purport to include all the necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comp
8、rises a front cover, an inside front cover, pages i and ii, the EN ISO title page, page 2, the ISO title page, page ii, pages 1 to 6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the ame
9、ndment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 8728:1999 BSI 06-1999i Contents Page National forewordInside front cover Foreword2 For
10、ewordii Text of EN ISO 87281 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NOR
11、M EN ISO 8728 December 1998 ICS 47.020.70Supersedes EN ISO 8728:1994 Descriptors: See ISO document English version Ships and marine technology Marine gyro-compasses (ISO 8728:1997) Navires et technologie maritime Compas gyroscopiques usage marin (ISO 8728:1997) Schiffe und Meerestechnik Kreiselkompa
12、sse fr die Seeschiffahrt (ISO 8728:1997) This European Standard was approved by CEN on 6 December 1998. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
13、 Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
14、under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy,
15、Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1998 CEN All rights of exploitation in any form
16、and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 8728:1998 E Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8728:1998 BSI 06-1999 2 Foreword The text of the International Standard ISO 8728:1998 has been p
17、repared by Technical Committee ISO/TC 8 “Ships and marine technology” in collaboration with Technical Committee CEN/TC 300 “Sea-going vessels and marine technology”, the secretariat of which is held by DIN. This European Standard supersedes EN ISO 8728:1994. This European Standard shall be given the
18、 status of a national standard, either by publication of an identical text or by endorsement, at the latest by June 1999, and conflicting national standards shall be withdrawn at the latest by June 1999. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the f
19、ollowing countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the Inte
20、rnational Standard ISO 8728:1998 was approved by CEN as a European Standard without any modification. Contents Page Foreword2 1Scope1 2Normative References1 3Definitions1 4Construction2 5Performance requirements2 6Type tests3 7Marking6 8Information6 Annex A (normative) Advice to ship surveyors for i
21、nstallation of gyro-compasses and repeater compasses on board shipsInside back cover Annex B (informative) BibliographyInside back cover Table 15 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun
22、 Nov 19 13:02:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8728:1998 ii BSI 06-1999 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
23、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
24、collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approv
25、al by at least 75 % of the member bodies casting a vote. International Standard ISO 8728 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee SC 6, Navigation. This second edition cancels and replaces the first edition (ISO 8728:1987), which has been technically re
26、vised. Annex A forms an integral part of this International Standard. Annex B is for information only. Descriptors: Shipbuilding, sea navigation, instruments, gyro-compasses, specifications, performance, manufacturing requirements, tests, type testing (tests), performance tests, marking. Licensed Co
27、py: sheffieldun sheffieldun, na, Sun Nov 19 13:02:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8728:1998 BSI 06-19991 1 Scope This International Standard specifies the construction, performance and type testing for gyro-compasses required by Chapter V of SOLAS, 1974. 2 Normative references T
28、he following standards contain provisions which, through reference in this text, constitute provisions of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard
29、are encouraged to investigate the possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO/R 694:1968, Positioning of magnetic compasses in ships. IEC 945:1994, Marine navigational equ
30、ipment General requirements Methods of testing and required test results. International Convention on Safety of Life at Sea (SOLAS) 1974 (amended). 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 gyro-compass complete equipment including all essent
31、ial elements of the complete design 3.2 true heading horizontal angle between the vertical plane passing through the true meridian and the vertical plane passing through the ships fore-and-aft datum line; it is measured from true north (000) clockwise through 360 NOTEWhen the gyro-compass equipment
32、is not installed on board ship, this “true heading” is regarded as the true heading of the lubber line. Where a gyro-compass has the facility of introducing a correction by moving the lubber line, the correction is set for the local latitude. 3.3 settled stable situation when any three readings take
33、n at intervals of 30 min are within a band of 0,7, with the compass level and stationary NOTEThe settling time is the elapsed time between the time of switch-on at the initial heading error and the third recording of the settle. 3.4 settle point heading mean value of ten readings taken at 20 min int
34、ervals after the compass has settled as defined in 3.3 3.5 settle point error difference between the settle point heading as defined in 3.4 and the true heading 3.6 error difference between the observed value and the settle point heading as defined in 3.4 3.7 bearing repeater compass device that rep
35、roduces the master compass card at a remote location 3.8 compass card graduated dial of the compass which indicates the measured direction of the meridian 3.9 latitude error error to which some gyro-compasses are subject, the magnitude and sign of which depend upon the local latitude NOTEMeans are p
36、rovided for correcting this error. 3.10 speed error error to which gyro-compasses are subject, the magnitude and sign of which depend upon the speed, course and latitude of the ship NOTEMeans are provided for correcting this error. 3.11 lubber line index line situated on the body of a compass agains
37、t which the compass heading is read 3.12 master compass main compass unit which supplies the heading information to the repeaters and other navigational aids 3.13 scorsby table test machine which independently oscillates a platform about three axes; it is used to simulate the motion of a ship Licens
38、ed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:43 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8728:1998 2 BSI 06-1999 4 Construction Gyro-compass units shall conform to the following requirements. 4.1 The equipment shall be capable of continuous operation under conditions of vibration,
39、 humidity, change of temperature and variations of the power supply as specified in 6.10.1 to 6.10.5. 4.2 For those ships which are required to carry bearing repeater compasses, the construction of these shall be as follows. a) The bearing repeater compass shall be designed to be fitted with an azim
40、uth reading device. b) A gimbal mechanism shall be provided to enable the bearing repeater compass card to be held horizontally against the ships motion. c) Any bearing repeater compass intended for use on an open deck shall be waterproof. 4.3 The compass card shall be graduated at equal intervals o
41、f 1 or fraction thereof. The graduation error shall be less than 0,2. A numerical indication shall be provided at least at every 10, starting from 000 clockwise through 360. 4.4 Fully adequate illumination shall be provided to enable the reading of all compass cards at all times. Facilities for dimm
42、ing shall be provided. 4.5 Both master compass and repeater compasses shall be provided with a lubber line to indicate the ships heading. 4.5.1 The base or some other fixed extremity of the compass shall be marked or identified in such a way as to facilitate the installation of the compass in a ship
43、 so that the lubber line lies in a vertical fore-and-aft plane of the ship. Where a gyro-compass has the facility of introducing a correction by moving the lubber line, the correction during installation shall be set to zero. If such marks or identifications are not in the same vertical plane as the
44、 uncorrected lubber line, then the horizontal angular relationship between them shall be clearly indicated. 4.6 Means shall be provided for correcting the errors induced by speed and latitude. Graphical or tabular means of correction may be used. 4.7 Steps shall be taken to eliminate as far as is pr
45、actical the causes of, and to suppress, electromagnetic interference between the gyro-compass and other equipment on board. 4.8 Mechanical noise from all units shall be so limited as to ensure the hearing of sounds on which the safety of the ship may depend. 4.9 The equipment shall be so constructed
46、 that it is readily accessible for maintenance purposes. 4.10 An automatic alarm shall be provided to indicate a power failure in the gyro-compass. 4.11 Means shall be incorporated for the protection of the equipment from excessive currents and voltages, transients and accidental reversal of power s
47、upply polarity. 4.12 The gyro-compass shall be designed to enable heading information to be provided to other navigational aids. 5 Performance requirements 5.1 Accuracy in latitudes up to 60 5.1.1 Settling time When switched on in accordance with the manufacturers instructions, the compass shall set
48、tle within 6 h. 5.1.2 Settle point error 5.1.2.1 The settle point error as defined in 3.5 at any heading shall not exceed 0,75 secant latitude, and the RMS value of the differences between individual heading indications and the mean value shall be less than 0,25 secant latitude. 5.1.2.2 The repeatab
49、ility of settle point error from one run-up to another shall be within 0,25 secant latitude. 5.1.3 Settling time under operational conditions When switched on in accordance with the manufacturers instructions, the compass shall settle within 6 h when rolling and pitching with simple harmonic motion of any period between 6 s and 15 s, a maximum angle of 5, and a maximum horizontal acceleration of 0,22 m/s2. 5.1.4 Settle point error under general conditions The repeatability of the settle point error of the master compass shall