The MD71EMC Electro-Magnetic Compass System
The Marine Data Systems MD71EMC is an Electro-Magnetic Compass (EMC) System which detects the Earth’s magnetic field directly. It then transmits the ship’s Heading over a NMEA 0183 digital connection to one or more Heading Repeaters installed at any convenient location on a vessel. The EMC has no moving parts – unlike a TMC (Transmitting Magnetic Compass) which detects the moving compass card of a ship’s compass in its binnacle.
The MD71EMC uses the latest technology to accurately process and convert the ship’s magnetic compass heading to NMEA 0183 heading data with unparalleled accuracy at speeds of up to 70 knots and rates of turn up to 20° per second. The system has been developed with improved magnetic correction facilities to reduce deviation effects caused by the magnetic influence of the craft. The compactness of the complete system makes it particularly appropriate where the size of the craft makes it physically impossible or financially imprudent to install a gyro.
The MD71EMC Transmitting Magnetic Compass System fromMarine Data: Flexible in application, easy to install and simple to maintain.
The use of a Magnetic to Digital system
Increasingly, Maritime Authorities are accepting the use of Transmitting Heading Device (THD) Systems on board vessels. Marine Data offers two types of THD system:
A system which senses the angular position of a ship’s magnetic compass card; this is known as a Transmitting Magnetic Compass System (TMC). This type of system provides a digital heading from an existing host magnetic compass installation in its binnacle; it detects the position of the moving compass card