The SKIPPER SD21 is a Single Axis Doppler Speed Log and a Dual Axis SATLOG Combined. It is designed to meet the IMO resolution MSC334(90) that require two separate speed logs for vessels above 50 000 dwt.
The SKIPPER SD21 gives accurate navigation parameters, measured as they happen, and presented in a logical, user friendly way.

SKIPPER DL21 Display
SD21 Specification
Speed Log : | SD21 |
Number of Axis : | 3+1 |
Speed range longitudinal: | +/- 99.9 knots from Satlog +/- 50 knots from doppler speed log |
Speed range transversal : | +/- 99.9 from Satlog N/A from doppler |
Water track (from) : | 2 meter |
Temperature accuracy error : | <1°C |
Power Supply : | AC : 115-230 V 50/60 Hz |
DC : 20-32 V | |
Power Consumption : | – Display 5W – Elecronic unit 10W |
Display : | – 28×30 pixle alphanumeric LEDs (red) with dimming – Multi – Panel PC 9″ touch display, resolution 800×480 |
Mounting dimensions display : |
– Dot matrix display: 124×124 mm. Bracket or panel mounting
– Touch display: 224.5 mm wide x 140 mm high – Antenna: 100 mm height, 180 mm width and 790 mm long
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IP rating : | Display : 2x Antenna : 66 |
Accuracy : | 0.2 knots or 2% whichever is greater |
Weight : | 1.2 kgs for Graphic display 1.8 kgs for dot matrix display for STW 3 kgs for antenna
4 kgs for electronic unit
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Mounting options : | |
Speed alarms : | High and low speed limits |
Power failure | |
Sensor failure | |
Outputs : | 4xNMEA 0183 |
2xLAN (IEC61192-450) | |
Inputs : | 2xNMEA 0183 (IEC61192-1) |
2xLAN (IEC61192-1) | |
NMEA Outputs: |
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Classification: | IMO Wheelmarked |
MED-B |
One full system consist of :
Displays needed : | |
SD21-SB Touch display | |
CD402CU-SC Dot Matrix display for STW | |
Needed: SL-SN300-SA Satlog GPS and Glonass antenna
One of the below sensors are needed:
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DL1SG-SA for 60 mm Sea Valve
DL1ST-SA for Steel Tank
DL1STA-SA for Aluminium Tank
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DL1SDB-SA for 100 mm Sea Valve
DL1SN-SA for Simrad NL-Log retrofit
DL1SS-SA for Sagem/Safran retrofit
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DL1SV-SA for Naviknot SRD331 retrofit
DL1SX-SA for PCSV60 retrofit
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Electronic Unit : | |
JB70SD21-SA | |
Bottom housings : |
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SB-60-SA Sea Valve for double bottom
DB-60-SA Sea Valve for single bottom
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ETNSTCL Steel Tank
ETNALC Aluminium Tank
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Read more : SKIPPER DL21 Navigation Speed Logs