The MD53A from MARINE DATA is an Earth’s Field Electro-Magnetic Compass which directly senses the Earth’s magnetic field. The MD53A has no moving parts and does not require a host magnetic compass.

SKU: F053006 Categories: ,


The MD53A/B from Marine Data is an Earth’s Field Electromagnetic Compass which directly senses the Earth’s magnetic field. The MD53A/B has no moving parts and does not require a host magnetic compass. In this way, the MD53A/B forms the sensing element of a solid-state Electromagnetic Compass (EMC) system – an alternative or a backup to a Gyro system.

The MD53A/B provides digital NMEA 0183 heading data (HDT, HDG, HDM) when used with the Marine Data MD97CSP Compass Sensor Interface. Vessel heading may be transmitted to any location on the vessel and displayed with a Marine Data compass heading repeater. Magnetic corrections and heading fluctuation damping are applied with the Marine Data MD71THD Variation and Deviation Corrector or the MD86HCU Heading Comparator Unit.

Constructed from robust aluminium alloy and finished in RAL7040 Window Grey semi-gloss paint, the MD53A/B is designed to complement existing marine navigation equipment.

The MD53A/B Electromagnetic Compass from Marine Data: Flexible in application, easy to install and simple to maintain.





  • Weight: 1.0 kg
  • Dimensions: H 166 mm; W 142 mm; D 123 mm
  • Mounting: Bulkhead, surface, or deck head
  • Connections: 5 m 5-core screened captive cable
  • Construction: Aluminium alloy housing and bracket
  • Finish: RAL7040 Window Grey, semi-gloss


  • Power Supply: Power is supplied by the MARINE DATA™ MD97CSP Compass Sensor Processor; 10 V; 400 – 500 Hz
  • Sensor Type: Magnetic Fluxgate coil, 3 phase
  • Data Input: Earth’s Magnetic Field
  • Data Output: 3 phase positional signal


  • Performance: ± 1° (static) accuracy
  • Follow-Up Rate: Instantaneous (limited by the processor unit)
  • Display: None, requires an external display (e.g. a MARINE DATA Compass Repeater)
  • Magnetic Flux Density: Operates from 0.12 to 0.38 Gauss (CGS) (12×10-6 to 38×10-6 Tesla)
  • MTBF: >30,000 Hours


  • IP rating: IP65
  • Operating temp: -15°C to +55°C
  • RoHS: Exempt


  • IEC 60945


  • Requires the MD97CSP Compass Sensor Processor to drive the coil, dampen heading fluctuations and provide a digital NMEA heading output
  • Requires the MD71THD to integrate the THD system components, calibrate the system for variation and deviation and display the Heading
  • Heading may be forwarded to a range of MARINE DATA Heading Repeaters for display at a convenient location on a vessel
  • Installation: As close to the vessel’s metacentre as practicable
  • Supplied: Mounting Bracket

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