- Dual Axis Doppler Speed Log
- Independent Single Axis Doppler Speed Log
- Water speed in single and dual axis (STW)
- Ground speed in dual axis (SOG)
- Docking functionality (Three axis in STW and SOG)
- 9" Touch Display
- Sea Temperature readout
- LAN and NMEA 0183 output
- User friendly programmable displays and integrated menus
- Fully automatic settings


The SKIPPER DL21 is a Dual Axis Doppler Speed Log and a Single Axis Doppler Speed Log in one sensor unit. It is working on the doppler principle, providing longitudinal and transversal ship’s speed (STW and SOG) and distance relative to sea water. The SKIPPER DL21 gives accurate navigation parameters, measured as they happen, and presented in a logical, user friendly way.

The new DL21 Speed Log is designed for ships over 50.000 GT with simultaneous and independent measurement of speed through water and speed over ground. This is according to new IMO resolution MSC334(90).

  DL21  Units
Number of Axis 2 and 3  
Speed range longitudinal +/-50  knots
Water track (from) 3  meter
Accuracy (Better than) 0.2  knots
Temperature accuracy Better than 1  °C
Display 9" Touch and dot LED display  
Mounting dimensions    mm
Front plate    mm
Cabinet mounting depth with cable    mm
Weight cabinet    kg
Standard cable length for display Any  m
Standard cable length for sensor 40  m
Sea Valve:
Single bottom Yes
Double bottom Yes
Speed alarms High and low speed limits
Power failure
Sensor failure

 - LAN

- 2 x NMEA 0183

- 2 x contact closure (pulse)

- Alarm (relay)



- 1 NMEA 0183 (OPTO isolated)

- External Dimming (pulse)

Accepted NMEA formats
Speed VBW, VHW
Distance VLW
Others MTW (temp)
Power supply AC: 115 - 230 V 50/60 Hz
DC: 24 V
Power consumption Max. 30 W for complete speed log
Language English
Classification Made to IMO performance standard
Service Available in most major harbours, world-wide through extensive dealer network

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