EVENTS:Sea Asia, 9-11th April 2019Sea Asia, 9-11th April 2019

MD74HR Digital Compass Repeater Display

Digital NMEA-based heading repeater with an LCD display, featuring a high visibility LED Turn Indicator which can display either Rate Of Turn or Course To Steer.


The MD74HR from MARINE DATA is a NMEA-based Digital Compass repeater with an LCD display. Digital heading data (ship’s heading) may be conveniently displayed at any location on a vessel. The MD74HR features a high visibility LED Turn Indicator which can display either Rate Of Turn or Course To Steer.

Compact and rugged, the MD74HR offers a heading repeater solution for locations where the available space is limited and may be either bulkhead or panel mounted. Finished in jet black to complement other marine navigation equipment.

The MD74HR Bearing Repeater from MARINE DATA: compact and rugged, flexible in application, easy to install and simple to maintain.


  • Back-lit LCD Heading Display and Heading Type with red tint
  • High visibility LED Turn Indicator in red
  • No internal moving parts
  • Automatic warning of loss of valid heading data
  • Automatic detection of a previously lost heading data type without requiring a reset
  • NMEA 0183 interface
  • Local and remote Dimming Control


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


  • Weight: 1.0 kg
  • Dimensions: H 137 mm; W 250 mm; D 78 mm (on bracket)
  • Fascia: 192 x 97 x 6 mm
  • Mounting: Panel mounted or Bulkhead mounted
  • Connections: 1 x 5-way screened cable to D-sub connector
  • Construction: Aluminium alloy enclosure
  • Finish: RAL9005 Jet Black, fine texture


  • Power Supply: 24 V dc nominal; 4 watts max; 18-32 V dc
  • Data input: RS422 NMEA 0183; 4800 Baud; others available
  • Data sentences: THS, HDT, HDG and HDM; detected on start‐up in descending order of priority
  • Cable: 2.5 m multicore data cable with D-sub connector to bare tail


  • Performance: ± 0.1° resolution
  • Follow-Up Rate: >20° per second
  • LCD Display: Numeric Heading Data with Heading Type
  • LED Display: Visual Turn Indicator (24 segments)
  • Resolution: LCD Display ±0.1°, LED Turn Indicator: 1°
  • Illumination: LCD Backlight: Red tint; LED Display: Red; variable dimming
  • Error Indication: LCD display flashes at 1 Hz whilst showing the last known good heading (alert condition)


  • IP rating: IP54 (IP65 option available)
  • Operating temp: -15°C to +55°C
  • RoHS: Compliant
  • Compass: Safe Distance 50 cm


  • Conforms with: IEC60945; IEC 62288
  • Type Approval: Germanischer Lloyd (GL)


  • Supplied: Panel Mounting Kit
  • Panel cut-out: 175 x 85 mm
  • Panel holes: 4 x M4; 182 x 87mm centres
  • Option: Bulkhead Mounting Kit
  • Option: Waterproofing to IP65 (with 2.5 m captive cable) – Model MD75HR/W
  • Option: Custom Paint Finish
  • Option: Remote Dimming

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