scope:

Specifies general requirements, type tests and individual tests for marine electromagnetic compassed intended for steering purposes and/or taking bearings on board ships the overall length of which is normally not less than 24 m. In this context an electromagnetic compass is an item of electronic equipment which uses the geomagnetic field to obtain information about the ship's heading. This information is conveyed to the main compass (which is used for steering and taking bearings), to additional repeater indicators, and, if required, to other navigational equipment.