(the price includes VAT)

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).

SKU: dl21 Category:


  • IMO Wheelmarked with MED-B
  • Water speed log dual axis (STW)
  • Independent Single Axis Doppler Speed Log (STW)
  • Ground speed in dual axis (SOG)
  • Docking functionality as standard (Three axis in STW and SOG)
  • Touch Display
  • RMRS and CCS available on request
  • Sea Temperature readout from sensor
  • LAN and NMEA0183 output
  • User friendly programmable displays and integrated menus
  • Fully automatic settings
  • Resultant Sea Current in speed and direction
  • According to new IMO resolution MSC334(90)


Speed Log:


Number of Axis:

2 and 3, with 1 axis in addition

Speed range longitudinal:

+/- 50 knots

Speed range transversal:

+/- 50 knots

Water track (from):

2 meter

Temperature accuracy error:


Power Supply:

AC:115-230 V 50/60 Hz

DC: 24 V

Power Consumption:

Max 30 W for complete speed log


9″ Touch and dot LED display

Mounting dimensions display:

124×124 mm. Bracket or panel mounting

190x119x114 mm for touch display


0.2 knots or 2% whichever is greater

Cable length for display:



1 kgs for CD402CU-XX

1,5 kgs for JB70D21-XX

1.4 kgs for CU-M001-XX

10 kgs for sensor with 40 m cable

Mounting options:

  • Steel Tank
  • Aluminium tank
  • 100 mm Sea Valve for single bottom
  • 100 mm Sea Valve for double bottom
  • Retrofit in ETNSLB used for DL850 540 kHz
  • Retrofit in Sea Valve for Sperry SRD 421/500

Speed alarms:

  • High and low speed limits
  • Power failure
  • Sensor failure


  • 3xLAN (IEC61162-450)
  • 8xNMEA0183 (IEC61162-1)
  • 5xAuxiliary (pulse, limit etc.)
  • 2xRelay (alarm etc.)


  • 3xLAN (IEC61162-450)
  • 3xNMEA0183 (IEC61162-1)
  • 3xAuxiliary (alarm and sync)

NMEA Outputs:

  • Speed: VBW and VHW
  • Distance: VLW
  • Others: MTW (Temperature)


  • IMO Wheelmarked
  • CCS on request
  • RMRS on request.
  • MED-B
  • MSC334(90), IEC61023, IEC60945, IEC61162-1/2/450, IEC62288 and ready for IEC61924


Available in most major harbours, world-wide through extensive dealer network