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This International Standard specifies the general requirements for the construction as well as the performance of type tests of magnetic compasses on board small craft of hull length up to 24 m. It refers to liquid magnetic compasses, which can be inspected (e.g. not sealed), either equipped with a direct reading system, or of the reflecting/projecting type. This International Standard also covers magnetic compasses (3.1) not supported on gimbals. The requirements relating to gimbals do not refer to such magnetic compasses. This International Standard does not cover - dry card compasses, or - types of compasses designed on principles different from those stated above or not complying with the description given in this clause (e.g. transmitting compasses).