Ships and marine technology — Transmitting heading devices (THDs) — Part 2: Geomagnetic principles
This part of ISO 22090 specifies the construction, performance, and testing of a device employing only magnetic means as transmitting heading devices required by chapter V, SOLAS 1974 (as amended).
A Transmitting Heading Device (THD) is an electronic device that provides information about the ship’s true heading.
In addition to the general requirements contained in IMO Resolution A.694(17) to…