MD69BRX Compass Bearing Repeater Bowl for Retrofit

The MD69BRX compass bearing repeater is provided as a bowl-only option for retrofit or replacement into third party gimbal rings.


The MD69BRX compass bearing repeater is equipped with dual scale 36:1 precision compass card display, and provided as a bowl-only option for retrofit or replacement into third party gimbal rings.

Ship’s Digital NMEA heading data may be conveniently displayed at any suitable location on a vessel to take celestial and terrestrial bearings.

Available retrofitting kits come with either gimbal bearings or pins, to fit most third party gimbal rings. Contact us for more information.


  • Fits a range of third party gimbal rings
  • Dual scale 36:1 precision concentric dial display
  • Balanced for taking bearings using our optional sights
  • Automatic selection and prioritisation of NMEA heading data type
  • Automatic warning of loss of valid heading data
  • Automatic detection of a previously lost heading data type without requiring a reset
  • True / Magnetic Source Indication
  • Local and Remote dimming control


  • Repeats the heading display of a ship’s magnetic or gyro compass at a convenient location on a vessel
  • Allows celestial and terrestrial bearings to be taken when used in conjunction with the MD69AZI Azimuth Sight or the MD69BC Bearing Circle. The MD60A2K Telescopic Alidade is recommended for making detailed azimuth measurements


  • MD69AZI – Azimuth Sight
  • MD69BC – Bearing Circle Sight
  • MD60A2K – Telescopic Alidade Sight
  • MD69CPC – Canvas Protective Cover


  • MD69BRX/B1 – Gimbal Bearings Retrofitting Kit, See datasheet for more information
  • MD69BRX/P1 – Gimbal Pins Retrofitting Kit for 254mm pitch Pins
  • MD69BRX/P2 – Gimbal Pins Retrofitting Kit for 273mm pitch Pins


  • Weight: 7.0kg (optimally balanced for Azimuth Sight)
  • Dimensions: H 127 mm W 271 mm; Body Ø 246 mm; Outer dial Ø 185 mm; Inner dial Ø 95 mm; Verge ring 20 mm (visible)
  • Mounting: MD69BR/GR1 Gimbal Ring, Third party Gimbal Ring
  • Connections: Multicore cable through watertight gland
  • Construction: Aluminium alloy enclosure
  • Finish: RAL7040 Window Grey, semi-gloss


  • Power Supply: 24 V dc 8 W nominal (22-31 V dc)
  • Data input: RS422 NMEA 0183; 4800 Baud; others available
  • Data sentences: HDT, HDG and HDM; selected in descending order of priority
  • Cable: 5 m multicore data cable tail


  • Performance: ± 0.01° resolution
  • Follow-Up Rate: 20° per second
  • Gimbal Action: ±45° pitch and roll
  • Display: Dual scale 36:1 rotating dial display
  • Heading LEDs: Blue = True Heading; Yellow = Magnetic Heading
  • Resolution: Outer scale marked at 1°, 5°, 10° & 45°; Inner scale marked at 0.1° & 1°
  • Illumination: LED array with local & remote dimming control; red tint
  • Error Indication: Loss of valid data: Dial oscillates ±35° about the last known good heading; dial illumination flashes


  • IP rating: IPX6
  • Operating temp: -25°C to +55°C
  • Shock: STANAG 4549 – NS (0.03; 3.0; 300)
  • Vibration: MIL-Std-167-1A / IEC 60945
  • EMC: MIL-Std-461E / IEC 60945
  • Thermal: MIL-Std-810F / IEC 60945
  • Noise: MIL-Std-1474D <= 53 dB
  • Compass: Safe Distance 100 cm


  • Type Approval: Germanischer Lloyd (GL)


  • Supplied: Bowl only, with 2.5 m captive cable. Mountings and junction boxes are optional extras

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