Electromagnetic Compass directly senses the Earth’s magnetic field and transmits magnetic heading to a Heading Repeater over a digital NMEA 0183 connection
The Human Input Device in a MARINE DATA Transmitting Heading Device (THD) System. Allows the magnetic correction coefficients and variation to be entered manually. Displays Heading
The MD53A from MARINE DATA is an Earth’s Field Electro-Magnetic Compass which directly senses the Earth’s magnetic field. The MD53A has no moving parts and does not require a host magnetic compass.