Transmit Magnetic Heading from a ship’s Magnetic Compass to a remote Heading Repeater Display over a digital NMEA 0183 connection.

Magnetic to Digital Overview
Increasingly, Maritime Authorities are accepting the use of Transmitting Heading Device (THD) Systems on board vessels. Marine Data offers two types of THD system:

1. 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
2. A system which directly senses the Earth’s magnetic field; this is known as an Electro-Magnetic Compass System (EMC). This type of system provides a digital heading directly from the Earth’s magnetic field; it does not require a host magnetic compass; it has no moving parts

The MD71TMC Transmitting Magnetic Compass System
Instead of using inflexible and bulky optical apparatus (reflectors, periscopes etc.) to view the magnetic compass, electronic remote displays may be used in the form of a Compass Repeater. The Marine Data MD71TMC is a Transmitting Magnetic Compass (TMC) System which detects and transmits the ship’s Compass Heading over a NMEA 0183 digital connection to one or more Compass Heading Repeaters at any convenient location on a vessel.

The Marine Data MD71TMC is a Transmitting Magnetic Compass (TMC) System which uses the latest technology to accurately process and convert the ship’s magnetic compass heading to NMEA 0183 heading data with unparalleled accuracy. TMC systems from Marine Data are simple and intuitive to use with quick and easy installation and on-board calibration.

Special Features

• Automatic calibration of the Magnetic Sensor Coil with host ship’s magnetic compass by turning the ship through 390°
• Intuitive menu-driven installer assistance when mounting the Sensor Coil to the ship’s host magnetic compass
• Dual power supply inputs
• Bright OLED display provides good clarity with high contrast and wide viewing angles
• Output: 2x NMEA 0183 data channels

Applications

• Provides a digital NMEA heading output to drive a Heading Repeater (or other devices) at a convenient location
• An elegant alternative to using an optical reflector in a ship’s magnetic compass installation