Ships and marine technology. Marine magnetic compasses, binnacles and azimuth reading devices
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1 Scope This International Standard gives requirements regarding construction and performance of marine magnetic compasses for navigation and steering purposes, binnacles and azimuth reading devices. 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 pivot inside a bowl which is completely filled with liquid, and which is supported in gimbals inside or outside the bowl. Compasses without gimbals are also covered by this International Standard; the requirements relating to gimbals do not apply to such compasses. This International Standard applies to
— all ships to which SOLAS applies (ships of gross tonnage ≥ 150 t, engaged on international voyages and ships of gross tonnage ≥ 500 t not engaged on international voyages) fitted with class A magnetic compasses,
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