Marine Data Systems

Marine Data Systems

Vittlefields Technology Centre, Forest Road, Newport, Isle of Wight, United Kingdom, PO304LY


Digital Compass Repeater Display (MD71HR)

Digital Compass Repeater Display (MD71HR)

Digital Compass Repeater Display (MD71HR) 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.

To view the magnetic compass, electronic remote displays are used in the form of a Compass Repeater. Digital Compass Repeater Display 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


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


  • Weights & Dimensions: MD71THD: H 96; W 96; D 35 (mm); 5 kg MD97CSP: L 146; W 64; D 41 (mm); 0.35 kg MD52A/B: H 18; Ø 69 (mm); 0.12 kg Excludes cables & connectors

  • Mountings: MD71THD: Panel mount supplied as standard; Trunnion mount (MD71TM) optional MD52A/B: MD54 or MD58 mountings direct to compass (depending on compass type)

  • Connections: MD71THD: 15-way D-type plug; 9-way D-type socket; MD52A/B: Buccaneer™ type male MD97CSP: Buccaneer™ type female; 1 gland

  • Finish: RAL9005 Jet Black, fine texture powder coat

  • IP Rating: MD71THD: IP54 MD97CSP: IP65 MD52A/B: IP65

  • Operating Temp: -15° C to +55° C

  • Storage Temp: -25° C to +70° C

  • RoHS: Compliant

  • Compass: Safe Distance: (MD71THD & MD97CSP): 50 cm

  • Complies with: IEC 60945; IEC 61162-1



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