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DRAFT INTERNATK5NAL STANDARD I8<WD» 25862

Ships and marinę technology — Marinę magnetic compasses, azimuth reading deyices and binnacies for steering

1 Scope

Thrs International Standard gives requlrements regarding construction and performance of marinę magnetic

compasses for navigation and steering purpose, binnacies and azimuth reading deyices.

According to the design of the ship, two types of binnacle are specified.

This International Standard applies to liquid-filled magnetic compasses:

—    intended for ship’s navigation and steering purpose in sea navigation according to regulations in force;

—    having a direct reading system;

—    which may be of the reflecting, projecting or transmitting types. In the context of this International Standard, a magnetic compass is an instrument consisting of a directional system supported by a single prvot inside a bowl which is completeiy filled with liquid, and which is supported in gimbais inside or outside the bowl. Compasses without gimbais are also covered by this International Standard. The requirements relating to gimbais do not apply to such compasses.

Al ships to which SOLAS applies (the ships of 150 gross tonnage and upwards engaged on International voyages and the ships of 500 gross tonnage and upwards not engaged on intemational voyages) shali be frtted with the Cłass A magnetic compass. Ali ships to which SOLAS does not apply shali be 1itted with the Ciass A or Class B magnetic compass. Lifeboats/rescue boats shali be fitted with a Class B magnetic compass and Annex H as tested with the following exemptions/requirements.

This International Standard, otherwise stated, applies to all magnetic compasses, and does not apply to:

a)    dry card compasses;

b)    types of compass designed on principles different from those stated above or not compfying with the descriptions given.

c)    hand bearing compasses

The requirements for their testing and certification, the positioning in ships, and the deviation adjustment are

given in Annex A, B, C, D, E, F, G and H.

In the Annex A, generał items on the testing and certification is specified.

In the Annex B, the testing and certification of marinę magnetic compasses are specified.

In the Annex C, the testing and certification of azimuth reading devices are specified.

In the Annex D, the type-testing of binnacies is specified.

In the Annex E, positioning of magnetic compasses in ships is specified.

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