SKIPPER DL21 Navigation Speed Logs

SKIPPER DL21 Navigation Speed Logs
SKIPPER DL21 Navigation Speed Logs

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).

SKIPPER DL21 Display

  • 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)

SKIPPER DL21 Specification

Speed Log : SKIPPER DL21
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 : <1°C
Power Supply : AC : 115-230 V 50/60 Hz
DC : 24 V
Power Consumption : Max 30 W for complete speed log
Display : 9″ Touch and dot LED display
Mounting dimensions display : 124×124 mm. Bracket or panel mounting

190x119x114 mm for touch display
Accuracy : 0.2 knots or 2% whichever is greater
Cable length for display : None
Weight : 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
Outputs : 3xLAN (IEC61162-450)
8xNMEA0183 (IEC61162-1)
5xAuxiliary (pulse, limit etc.)
2xRelay (alarm etc.)
Inputs : 3xLAN (IEC61162-450)
3xNMEA0183 (IEC61162-1)
3xAuxiliary (alarm and sync)
NMEA Outputs: Speed: VBW and VHW
Distance: VLW
Others: MTW   (Temperature)
Classification: IMO Wheelmarked
CCS on request
RMRS on request.

One full system consist of :

Displays needed : SKIPPER DL21 Electronic Unit
CU-M001-21-SB for Dual Axis SOG and STW
CU-M001-21-SB for Dual Axis SOG and STW
Sensor options :

Sensor Option
Sensor Option
DL21SG-SA for 100 mm Sea Valve
DL21SE-SA for ETNSLB retrofit
DL21SW-SA for Sperry SRD-421/500 retrofit
Electronic Unit :  
Bottom housings :

Bottom housings
Bottom housings
SB-100-SB Sea Valve for single bottom
DB-100-SB Sea Valve for double bottom


Read more : SKIPPER ESN100 IMO Wheelmarked Echo Sounder

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