SKIPPER Products

New SKIPPER Products are now available

  • Remote NMEA Dimming Switch
  • Software

SL1200 (SOG Speedlog)

For pure SOG low budget systems the SL1200 is ideal. Based on a dual GPS/GLONASS antenna the system calculates the vessels SOG, longitudinal and transversal at the sensor, fore and aft, with no extra inputs needed. Additional parameters of heading, GPS position are also available and can be used as additional data for your vessel (not as primary source). The SL1200 meets the wheelmark requirements for SOG, but has limited IO. (See spec sheet here)

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SD21 Multi Combined Satlog and Doppler

Full coverage of the wheelmark SDME (IEC61023 ) standard can be achieved with the SD21 combined SATLOG(SOG) and Doppler Speed Log (DL1). This system includes all the IO you will require, total 13 NMEA0183 outputs (4 for STW, 7 for SOG), Auxiliary outputs and inputs and LAN. The systems are designed to be simple to integrate to INS or supported PCs.  This system is ideal for vessels that have limited/difficult access to the hull, or complicated hydrodynamics, such as dual ended ferries, landing craft. Etc.

Auxiliary and NMEA inputs can be used to rotate the system in dual end ferries. 

S2 Multi Satlog (Advanced SOG only).

The full array of IO and integration abilities can also be used as a pure Satlog SOG system, This system is as the SD21 but without the DL1 element. In this case the customer can combine with any of the other acoustic/EM products (DL2, DL21, DL1-Multi or EML224) to give a robust speed system, with varying technologies and possibility of redundancy for the optimal system setup.

Satlog vs Doppler/EML technology


The market has long been sceptical to using gps based speed measurements. We all know and see that satellite navigation is a stable accurate technology, but it is known to fail occasionally, in fjords, at the poles, under bridges etc. The SKIPPER system meets stringent test requirements, it uses dual satellite technology (GPS and Glonass), combining both solutions. It calculates its own heading. And like other SKIPPER Speed Logs includes an accelerometer, allowing short periods of fallout. The system is developed together with world leading DP experts Kongsberg Seatex, and has been shown to be reliable and accurate.

SKIPPER Doppler systems

These have been on the market for many years and are accepted as a norm. Recent advancements with multiple frequency use and combined sensors have made the DL series even more reliable, robust and accurate. Doppler gives local measurement of STW, giving a baseline for the vessels efficiency, maintenance program and navigation systems as well as being important for correct propulsion, efficient use of rudders and stabilisers. Doppler SOG is a direct measurement down to approx. 200m, and combined with Doppler STW is the best way to get good water current values and direction.


Electromagnetic systems provide a low cost STW value, measuring at the skin of the vessel with no depth requirements. The measurement principal is different to doppler and can be combined to give a robust system. The sensor is small (60mm) and therefore easy to mount on hulls with few good mounting points. EML requires maintenance (cleaning) and occasional recalibration, so we always recommend Sea Valve installation of all Speed Logs.

New Echosounders

SKIPPER has a new generation of echosounders namelly the ESN100 and ESN200.

ESN100 SB webESN200 screen cropped

ESN100 Single channel exhosounder

This is designed to give a low cost IMO wheelmark Echosounder (ESN100) with possibility fore and aft transducers, at the standard 50kHz and 200kHz. A new 2 frequency transducer (ETS50200) is available  and can be placed fore and aft. The systems can be made to automatically switch between 50 and 200 based on depth and signal strength.  Adjusting gains and power is a thing of the past, and all parameters are now automatic, however it is possible to manually adjust if required. (more info)

ESN200 Advanced dual channel echosounder

ESN200 is a more advanced system with 2 channels and 8 pre-programmed frequencies. For the first time the 38kHz is approved for navigational use as well as the 50 kHz and 200 kHz transducers. The ESN200 is part of the Multi family and has lots of IO capabilities (7 NMEA outputs, 3 inputs, LAN, Auxilliary), ALF alarming, INS ready features, multiple screen possibility, synchronisation and much more. (More info)

Remote Dimming

Dimming a whole bridge currently requires visiting many stations and often dimming many individual units. SKIPPER equipment has over time had a number of ways of remotely dimming, starting with pulses to repeaters, NMEA, LAN and of course direct dimming control. New generation products include a more advanced NMEA dimming method.  Each display unit can be set up to have 4 themes in colour and brightness level. These themes are triggered by the user sliding the on screen dimmer, or by using a remote DDC command. This command can give the 4 themes (Day/Twilight/Night/OFF) and % brightness. The SKIPPER displays can be made to ignore the % and just look at the themes. This allows the user to have different brightness levels in different parts of the bridge using a single common DDC command. 

IR30DIM-SB Pulse Dimmer switch

This is a simple switch to replace the older -SA unit for pulse dimming. 


IR31DIM NMEA Dimmer switch

This is a new NMEA and pulse dimmer unit that can be used to give a central dimming command. DDC.  Either as a 4 level theme command, or as a 10 level command with theme and brightness.  In addition the switch has an internal or external light sensor, and can be made to dim automatically.

If you have special dimming commands these can be programmed into the system using the skipper service software, and this can be sent out of 1 of the 2 outputs.

Dimming levels can also be pre-programmed or adjusted using the dimmer buttons.  

The system has 2 inputs and 2 outputs and the dimming commands can be multiplexed on to the incoming NMEA commands. (More info)

Front cropped

Whats next?


SKIPPER Development is focused on the quality and reliability of the sensor data and is working on a number of features to give the best possible data at all times, and using the available second source data to indicate and correct any issues with minimal user intervention. Advanced logging function and Auto functions are central to this and these features are being rolled out in the new Multi products. Service issues are now tackled faster by the crew inserting a USB stick, and sending a data and setup file to the service organisation. Diagnostics is performed before a service and the likelihood of first time fix is greatly increased.


Skipper service software (v1.84) (link here) has also been updated with IR31 Dimming switch and a number of new logging/diagnostic features.

New development

Graphic versions of the EML and DL1 are currently under development and are aimed to be available by the end of 2019, these will be presented at Norshipping 2019


SKIPPER is part of an industry wide collaboration project ( ) to make a standardised INS interface for navigation sensors, results will follow…


New software available now:

DL1-Multi Version 1.59 including a number of web page fixes, and an extra filter to filter out noisy acoustic periods

DL2 Patch improving logging features and better use of the multiple frequency capabilities of the system

ESN200 V 1.0.1 introducing remote dimming, logging and auxiliary features

All are available for download from the skipper download pages (

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