The MD71HR from MARINE DATA is a modular NMEA-based OLED Digital Heading Repeater, housed in a robust, compact aluminium enclosure with a multi-function keypad.


The MD71HR from MARINE DATA is a modular NMEA-based OLED Digital Compass Repeater, housed in a robust, compact aluminium enclosure with a multi-function keypad. The compact 1-DIN size makes it an ideal addition to any work boat, enabling digital heading data (ship’s heading) to be displayed and monitored at any location on a wide range of vessel types.

Compact and rugged, the MD71HR offers a heading repeater solution for locations where space is limited and may be either bulkhead or panel mounted. Finished in jet black to complement other marine navigation equipment.

The MD71HR from MARINE DATA: flexible in application, easy to install and simple to maintain.


  • Displays True or Magnetic Source
  • Yellow OLED Display, 2.7” (128 x 64 pixel) with superb black-level reproduction
  • Six button membrane-type keypad
  • Designed to be flush-mounted unobtrusively in a console panel
  • Automatically Detects NMEA Heading Types


  • Repeats the display of a ship’s magnetic or gyro compass at any convenient location on a vessel
  • Provides the heading display in an Electromagnetic Compass System


  • Weight: 0.4 kg
  • Mounting: Panel mount (standard); Bulkhead mount (option)
  • Dimensions: H 96 mm; W 96 mm; D 77 mm (H 150 mm on bracket); Fascia 96 x 96 x 6 mm deep
  • Connections: 1x 15-way D-type connector; M4 Earth stud
  • Construction: Aluminium alloy enclosure
  • Finish: RAL9005 Jet Black, fine texture paint


  • Power Supply: 12-24 V DC; 2.5 W max (0.1 A; 24 V dc) Low Power alarm trigger: 9.0 V Low Power alarm cancel: 11.5 V
  • Data Input: Digital RS422
  • Data Protocol: NMEA 0183 (IEC 61162-1) Compliant; 4800 / 9600 / 19200 / 38000 Baud; Auto-selecting
  • Data Sentences: THS, HDT, HDG and HDM; detected on start-up in descending order of priority
  • Data Output: Visual OLED Display and Status Indicator Data; RS422 (IEC 61162-1) NMEA 0183; Audible Alarm
  • Remote Dim: Optional; 0-24 V dc (with respect to supply negative)
  • Cable: Supplied with 2.5 m multicore data cable


  • Performance: Dependant on received data
  • Display: 2.7” 128 x 64 Pixel OLED – Yellow
  • Error Indication: Flashing Warning Message + Audible Alarm Fixed Warning Message (acknowledged alarm)
  • MTBF:  >30,000 hours


  • IP rating: IP54
  • Operating temp: -15°C to +55°C
  • Magnetic: Magnetic Permeability: Category ‘A’
  • Compass: Safe Distance 50 cm


  • Complies with: IEC60945
  • RoHS: Compliant


  • Supplied: Panel mounting kit
  • Supplied: 2.5 m data cable
  • Option: Bulkhead Bracket
  • Option: NMEA2000 / CAN Bus Input
  • Option: Remote Dimming
  • Option: Front panel sealed to IP67 rating
  • Option: Alarm solid state relay: 1 A / 60 V rated

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