The MD68HRB from MARINE DATA is a dual-scale NMEA-based Steering Repeater with a clear and easy to read analogue dual-scale dial display.


The MD68HRB Steering Repeater from MARINE DATA is a dual-scale NMEA-based Steering Repeater with a clear and easy to read analogue dual-scale dial display. The display has an outer dial of 164 mm diameter graduated in 1 degree increments and an inner dial of 103 mm with a resolution of one tenth of a degree.

The MD68HRB Steering Repeater is housed in a robust, compact aluminium enclosure fitted with a rotary encoder for controlling the level of background illumination. Finished in jet black to complement other marine navigation equipment, it is ideal for any vessel.

When multiple heading sources are available in the heading data (e.g. True and Magnetic) the MD68HRB Steering Repeater automatically prioritises and indicates which heading source is in current use. The encoder has a pushbutton facility for an internal self-test.

Compact and rugged, the MD68HRB Steering Repeater offers a solution for digital heading data (ship’s heading) to be conveniently displayed and monitored at any convenient location on a vessel. Suitable where the available space is limited and may be either bulkhead or panel mounted.

The MD68HRB from MARINE DATA: Flexible in application, easy to install and simple to maintain.


  • Dual Scale 36:1 precision concentric dial display suitable for Vessel Steering
  • Automatic selection and prioritisation of NMEA heading data type
  • Prioritisation of heading type: HDT (true), HDG (magnetic + variation), HDM (magnetic)
  • Automatic warning of loss of valid heading data and automatic detection of a previously lost heading data type without requiring a reset
  • Local and remote dimming control


  • The MD68HRB displays True or Magnetic Heading Data transmitted from marine equipment compatible with NMEA 0183 (IEC 61162-1)(Gyro compass, TMC, EMC, GPS Compass etc.)
  • High Resolution 36:1 Dual Scale Display for Vessel Steering

What is a Steering Repeater?

The Steering Repeater ensures a clear indication of the heading information by using a 360° and a 10° compass card. In addition, True / Magnetic indicators provide clear indication of heading source.  The 360° and 10° compass cards, provide a graduation of a tenth of a degree.


  • Weight: 2.0 kg (with bulkhead mounting bracket)
  • Dimensions: H 220 mm; W 246.5 mm; D 92 mm Fascia 192 mm x 192 mm x 6 mm Deep Outer dial Ø 164 mm; Inner dial Ø 103 mm
  • Mounting: Bulkhead or Panel mounted
  • Connections: 1 x data cable to 15-pin D-sub plug
  • Construction: Aluminium alloy enclosure
  • Finish: RAL9005 Jet Black; fine texture


  • Power Supply: 24 V dc (18-31 V dc) 6 W nominal
  • Data Input: Digital RS422; NMEA 0183 protocol 4800 / 9600 / 19200 / 38000 Baud (auto-sensing)
  • Data Sentences: THS, HDT, HDG and HDM; detected on start‐up in descending order of priority
  • Cable: Supplied with 2.5 m multi-core data cable


  • Performance: ± 0.05° accuracy
  • Follow-Up Rate: >20° per second
  • Display: Concentric dual scale 36:1 rotating dials
  • Dial Resolution: Outer scale marked at 1°, 5°, 10°, 45°; Inner scale marked at 0.1°, 1°
  • Dial Illumination: LED array with local and remote dimming control, Red tint
  • Error Indication: Dial oscillates ± 35° about the last known good heading. Dial illumination flashes
  • Heading Type: LED indicator for heading source type: Gyro Compass / Magnetic Compass
  • MTBF: 30,000 hours


  • IP rating: IP54
  • Operating temp: -15°C to +55°C
  • RoHS: Compliant
  • Compass: Safe Distance 100 cm


  • Conforms with: IEC 60945; IEC 62288; IEC 61162-1; ISO 8728; IMO Resolution A1021 (26)
  • Type Approval: Pending


  • Option: Custom Paint Finish

Have an enquiry? We're here to help!

Request a Callback

From one of our experts

Contact Sales

Get a quotation

Add products to your quote