Furuno DS-80

The Furuno DS-80 is an SDME (Speed and Distance Measuring Equipment) utilizing the Doppler Effect principle. It complies with the latest IMO, IEC and ISO standards as well as the rules of the classification societies.

Unlike an electromagnetic speed log or other type, this equipment does not require a sensor protruding through the ship hull; this greatly reduces the routine maintenance. Another special feature is the capability to measure own ship speeds at dead slow movement with high accuracy. The pair-beams at 1 MHz sonic frequency ensure accuracy in rough water.

Furuno DS-80 Doppler Speedlog


  • 1mHz Paired-Beam Doppler Effect Measuring System
  • Vessel Speed and Distance Run Display
  • 4.5″ Illuminated Monochrome LCD with Selectable 12mm or 23mm Character Size
  • Simple Operation – just turn it on
  • Speed Output Data Feed for ARPA, Radar, ECDIS, AIS, VDR, GMDSS Equipment, etc.
  • Fore – Aft Speed Range = -10.0 to +40 Knots Through-The-Water
  • Distance Run Range = 0 to 999,999.99 Nautical Miles
  • Distance Run Reading resettable to any value within range
  • Speed accuracy of 1.0% or 0.1 Knots, whichever is greater
  • Distance accuracy of 1.0% or 0.1 Nautical Miles, whichever is greater
  • Paired Beams increase accuracy and eliminate the effect of vessel pitching
  • Easy speed correction settings during trial runs
  • Demonstration Mode
  • Diagnostic Mode
  • Automatic Mode switches DS80 to GPS Speed if SDME fails
  • Compliance with latest IMO Standard A.824, IEC 61023 and ISO standards
  • Automatic velocity correction for any water temperature change
  • Optional Analog and Digital Remote Displays are available
  • Simple operation. In most cases all that is required to display ship’s speed is to turn on the equipment.
  • Pair-beam system effectively reduces error caused by pitching. The transducer assembly symmetrically emits two sonic beams, one fore and the other aft. By averaging the Doppler shift in both directions accurate speed data is available under rough sea conditions.
  • Speed and distance information on the adjustable-contrast LCD display.
  • Analog display, digital Indicator and digital distance indicator display optionally available.
Furuno DS-80 Controls

Simple operation system

The primary functions of the Furuno DS-80 operate without any interaction. Simply keep the power-switch on. The user-friendly menu ensures easy adjustment of all functions. Auxiliary functions such as resetting the Distance Run and speed offset are easy using the menu.

Optional analog and digital remote displays are available to enhance the convenience of navigation. A new transducer was designed with the same dimensions as the DS70 transducer. It may be fitted to the hull directly or with a gate valve.

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