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

MD74RDI/W Weatherproof Digital Rudder Angle Indicator

The MD74RDI/W is a weatherproof, four digit LCD Rudder Angle Indicator with LED Bar Indicator

The MD74RDI/W is a weatherproof (IPX6) four digit LCD Rudder Angle Indicator with LED Bar Indicator. It accepts a NMEA 0183 digital input from a Marine Data MD61 Rudder Angle Sensor Transmitter via the MD94DDU Data Distribution Unit. The Rudder Angle Indicator digital display gives a resolution to 0.1° and is accurate to 0.1°. In addition to the digital display, it has a bar LED indicator to show Port or Starboard manoeuvres.

The Rudder Angle Indicator can be panel mounted (kit included) or bulkhead mounted with an optional adjustable Trunnion Bracket MD74TB. Internal components are housed within a robust aluminium enclosure. The MD74RDI/W is rated to IPX6, an IP54 version MD74RDI is also available.

Finished in RAL7040 Window Grey or RAL9005 Jet Black powder coat paint, the MD74RDI/W is designed to complement existing marine navigation equipment.

Compact and rugged, the MD74RDI/W offers a Rudder Angle Indicator solution for locations where available space is limited and allows digital Rudder Angle data to be conveniently displayed at any location on a vessel.

The MD74RDI/W from Marine Data: flexible in application, easy to install and simple to maintain.

Special Features

  • Compact digital display of Rudder Angle
  • Port and Starboard turn indication
  • Weatherproof to IPX6
  • Wheelmark Approved when installed as part of the Marine Data Rudder Angle Transmission and Indication System


  • Displays Rudder Sensor Angle Data transmitted from NMEA 0183 (IEC 61162-1) compatible equipment

Related Products & Systems

MD61 – Rudder Angle Sensor Transmitter
Rudder Angle Transmission System


  • Weight: 1.0 kg
  • Dimensions: H 137 mm; W 250 mm; D 57 mm; Fascia: 192 x 97 x 6 mm
  • Mounting: Panel Mount or optional Bulkhead Bracket
  • Connections: 2.5 m captive data cable; M4 earth stud
  • Construction: Aluminium alloy enclosure
  • Finish: RAL7040 Window Grey


  • Power Supply: 24 V dc (18-32 V) 10 W max
  • Data input: Digital RS422 / RS485; NMEA 0183; 4800 Baud
  • Data sentence: RSA ($–RSA,x.x,A,x.x,A*hh)
  • Dimming: 0-24 V dc (with respect to supply negative)


  • Performance: ± 0.1° accuracy
  • Display: Digital Display to 0.1°, Port and Starboard indication
  • Error Indication: Loss of valid data: Display flashes


  • IP Rating: IPX6
  • Operating temp: -15°C to +55°C
  • Compass: Safe Distance 50 cm


  • Compliancy with: IEC60945;IEC61162-1;ISO20673
  • RoHS: Compliant
  • Type Approval: Germanischer Lloyd (GL); Wheelmark Approved as part of the MARINE DATA RDI System


  • Supplied: Panel Mounting Kit
  • Option: RAL9005 Jet Black paint finish; fine texture
  • Notice: The MD74RDI-W is only to be used with a Type Approved Rudder Angle Indicator System in accordance with ISO 20673
  • Accessory: Bulkhead Mounting Kit

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