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1、BRITISH STANDARD BS EN ISO 8729:1999 Ships and marine technology Marine radar reflectors The European Standard EN ISO 8729:1998 has the status of a British Standard ICS 47.020.70 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 8729
2、:1999 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 05-1999 ISBN 0 580 32227 0 National foreword This British Standard is the English la
3、nguage version of EN ISO 8729:1998. It is identical with ISO 8729:1997. It supersedes BS EN ISO 8729:1995 which will be withdrawn on 30th June 1999.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,
4、which 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
5、them 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 corres
6、ponding 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 Cat
7、alogue. 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 co
8、mprises 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 4, 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 a
9、mendment table on the inside front cover. Amendments issued since publication Amd. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 8729:1999 BSI 05-1999i Contents Page National forewordInside front cover Foreword2 F
10、orewordii Text of ISO 87291 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI ii blank Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM
11、 EN ISO 8729 December 1998 ICS 47.020.70 Supersedes EN ISO 8729:1994 Descriptors: See ISO document English version Ships and marine technology Marine radar reflectors (ISO 8729:1997) Navires et technologie maritime Rflecteurs radars de marine (ISO 8729:1997) Schiffe und Meerestechnik Radarreflektore
12、n fr die Schiffahrt (ISO 8729:1997) 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. Up-t
13、o-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 under
14、 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, Luxem
15、bourg, 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 and b
16、y any means reserved worldwide for CEN national Members. Ref. No. EN ISO 8729:1998 E Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8729:1998 BSI 05-1999 2 Foreword The text of the International Standard ISO 8729:1998 has been prepar
17、ed 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 8729:1994. This European Standard shall be given the stat
18、us 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 follow
19、ing 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 Internat
20、ional Standard ISO 8729:1998 was approved by CEN as a European Standard without any modification. Contents Page Foreword2 1Scope1 2Normative references1 3Definitions1 4Construction1 5Performance requirements1 6Type tests and inspection3 7Marking4 8Installation4 Annex A (normative) Mounting height of
21、 the reflectorsInside back cover Annex B (informative) BibliographyInside back cover Figure 1 Example diagram produced by a Luneberg reflector2 Figure 2 Example diagram produced by a corner reflector3 Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:44 GMT+00:00 2006, Uncontrolled Copy,
22、(c) BSI Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8729:1998 ii BSI 05-1999 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of
23、 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
24、, 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. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. P
25、ublication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 8729 was prepared by Technical Committee ISO/TC 8, Ships and marine technology, Subcommittee SC 6, Navigation. This second edition cancels and replaces the first
26、 edition (ISO 8729:1987), which has been technically revised. Annex A forms an integral part of this International Standard. Annex B is for information only. Descriptors: Shipbuilding, sea navigation, instruments, radar equipment, installation, specifications, performance, manufacturing requirements
27、, tests, type testing (tests), performance tests, marking. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8729:1998 BSI 05-19991 1 Scope This International Standard specifies the minimum requirements for a radar reflector intended to
28、 enhance returns from small vessels as required by IMO Resolution A.384(X). It lays down the specification for the construction, performance, installation, testing and inspection of such radar reflectors. 2 Normative references The following standards contain provisions which, through reference in t
29、his 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 are encouraged to investigate the possibility of applying the most rece
30、nt editions of the standards indicated below. Members of IEC and ISO maintain registers of currently valid International Standards. IEC 945:1994, Marine navigational equipment General requirements Methods of testing and required test results. IMO Resolution A.384(X) (adopted on 14 November 1977), Pe
31、rformance standards for radar reflectors. 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 radar reflector any passive device which is designed to enhance returns from small radar targets 3.2 echoing area area which is 4; times the ratio of the powe
32、r per unit solid angle scattered in a specified direction to the power per unit area in a plane wave incident on the scatterer from a specified direction NOTEIt is dependent on the radar operating frequency, and the three-dimensional orientation of the reflector. Polarization of the transmitter and
33、the received wave affects the effective echoing area of the reflector. In case of free space propagation, the echoing area , in square metres, can be measured by the following equation: where 3.3 azimuthal polar diagram polar diagram relating the echoing area of the reflector to the azimuthal angle
34、about its vertical axis 3.4 Luneberg reflector reflector, making use of a number of concentric spheres of varying refractive index, capable of focusing incident energy onto a reflecting surface (see Figure 1) 3.5 corner reflector reflector, consisting of three flat conducting surfaces intersecting m
35、utually at right angles, which reflects the greater part of the incident waves parallel to their direction of incidence (see Figure 2) 4 Construction 4.1 Structure and materials The materials used for the radar reflector shall be of sufficient strength and quality as to make the reflector capable of
36、 maintaining reflection performance under conditions of stress due to sea states, vibration, humidity and change of temperature likely to be experienced in the marine environment as specified in 6.2 and 6.3. Use of ferrous metals should be avoided. 4.2 Colour The radar reflector intended for install
37、ation on board vessels shall not be coloured black. It should be of a highly visible colour. 5 Performance requirements The radar reflector shall comply with the following minimum requirements for all frequencies between 9 320 MHz and 9 500 MHz. 5.1 Reflecting pattern in horizontal plane 5.1.1 The m
38、aximum echoing area of the radar reflector shall be at least 10 m2. 5.1.2 Its azimuthal polar diagrams shall be such that its response over a total angle of 240 is not less than 2,5 m2. The response shall not remain below this level over any single angle of more than 10. Sis the receiver power, in w
39、atts; Ris the distance between radar and target, in metres; Pis the transmitting peak power, in watts; Gis the antenna gain; is the wave length, in metres. Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8729:1998 2 BSI 05-1999 NOTETy
40、pical azimuthal polar diagrams of two types of marine radar reflector are shown in Figure 1 and Figure 2. 5.1.3 These requirements shall be assessed by reference to related azimuthal polar diagrams about the reflectors vertical axis and tilted from the vertical at angles not exceeding 3. 5.2 Reflect
41、ing pattern in vertical plane The performance of the reflector, up to at least 15 from the horizontal shall be such that its response at any inclination remains above 0,625 m2 over a total angle of at least 240. 5.3 Other requirements The radar reflector shall be in accordance with the requirements
42、for class X equipment in IEC 945:1994, clause 3. Figure 1 Example diagram produced by a Luneberg reflector Licensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8729:1998 BSI 05-19993 6 Type tests and inspection 6.1 Visual inspection A visu
43、al inspection shall be carried out to confirm that the construction and finish of the reflector are satisfactory. 6.2 Performance test The performance test shall be carried out in a chamber or on a test site where the background noise level has been reduced to the equivalent echoing area of 0,01 m2
44、or less at frequencies between 9 320 MHz and 9 500 MHz. The test shall consist of measurement of polar patterns of the reflector within the volume defined in 5.1 and 5.2. These shall be spaced in elevation with a separation not exceeding 2,5. Figure 2 Example diagram produced by a corner reflector L
45、icensed Copy: sheffieldun sheffieldun, na, Sun Nov 19 13:02:44 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 8729:1998 4 BSI 05-1999 6.3 Mechanical strength test The reflector shall be mounted in the recommended way and moved under water at a relative velocity of 1,3 m/s in both directions in ea
46、ch of three mutually perpendicular planes consecutively. The reflector, mounted in the recommended way, shall also be subjected to a jet of water delivered at a rate of 1 kPa for a period of not less than 10 s on five separate locations on each face. 6.4 Other tests The following tests shall be perf
47、ormed on the reflector: Dry heat cycle test, in accordance with IEC 945:1994, 4.4.2; Damp heat cycle test, in accordance with IEC 945:1994, 4.4.3; Low temperature cycle test, in accordance with IEC 945:1994, 4.4.4; Thermal shock test, in accordance with IEC 945:1994, 4.4.5; Drop test, in accordance
48、with IEC 945:1994, 4.4.6; Vibration test, in accordance with IEC 945:1994, 4.4.7; Corrosion test, in accordance with IEC 945:1994, 4.4.11. 7 Marking A label shall be affixed to each reflector, on a surface that does not contribute significantly to radar reflector performance, indicating: a) the manu
49、facturer; b) the mark or type number; c) the year of manufacture; d) the recommended mounting height of installation (see 8.3 and Annex A); e) the mass of the reflector; f) the maximum echoing area of the reflector; g) the compass safe distance, if applicable; h) the recommended orientation of mounting. 8 Installation 8.1 Method The radar reflector shall be installed in accordance with a method recommended by the manufacturer. Fixing arrangements shall be provided so that the reflector can be fitted in its correct o