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

MD73HR Tape Compass Heading Repeater

The MD73HR is a NMEA-based heading repeater with a true moving tape display.

The MD73HR is a NMEA-based tape compass repeater with a true moving tape display. Digital heading data (ship’s heading) may be conveniently displayed at any location on a vessel.

The MD73HR can be set to show the Course to Steer over a ± 30° range on an illuminated LED bar-type display.
Compact and rugged, the MD73HR 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 MD73HR from Marine Data: flexible in application, easy to install and simple to maintain.

Special Features

  • Automatic selection and prioritisation of NMEA heading data type
  • True or Magnetic Source Indication
  • 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 dimming control


  • Repeats the heading 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

Related Products

  • MD73HR/W – Weatherproof Tape Compass Repeater
  • MD73SR – Compact Submarine Tape Compass Repeater


  • Weight: 2.5 kg
  • Dimensions: H 123 mm; W 290 mm; D 202 mm Fascia 235 mm x 85 mm x 4 mm deep
  • Mounting: Panel Mount or Bulkhead Mount
  • Connections: 1x data cable to 15-pin D-sub plug, M4 Earth Stud
  • Construction: Aluminium alloy enclosure
  • Finish: RAL9005 Jet Black; fine texture


  • Power Supply: 24 V dc 6 W nominal (22 V -31 V dc)
  • Data input: Digital RS422 NMEA 0183; 4800 & 9600 Baud
  • Data Sentences: HDT, HDG and HDM; detected on start‐up in descending order of priority
  • Cable: 2.5 m multicore data cable


  • Performance: ± 0.1° resolution
  • Follow-Up Rate: 10° per second
  • Display: Continuous moving tape, Height 44 mm
  • Resolution: Scale marked at 1°, 5° and 10° (1° = 4 mm)
  • Illumination: LED array; dimming control; red tint
  • LED Display: Course to Steer; 61 Yellow LEDs; Heading range ± 30°; Out of Range LED indicators: Red (port) and Green (starboard)
  • LED Resolution: 1 element = 1°
  • Loss of valid data: LED bar display shows a repeated cycle of diverging lights moving from centre


  • IP rating: IP54
  • Operating temp: -15°C to +55°C
  • Storage temp: -25°C to +70°C
  • RoHS: Compliant
  • Magnetic: Magnetic Permeability Category ‘A’
  • Vibration:
    • 1.00 – 12.5 Hz – ± 1.60 mm
    • 12.5 – 25.0 Hz – ± 0.38 mm
    • 25.0 – 50.0 Hz – ± 0.10 mm


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


  • Supplied: Panel Mounting Kit
  • Option: Bulkhead Mounting Kit
  • Option: Custom Paint Finish

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