We produce Navigation and data logging software for the collection of bathymetry, sonar, towed magnetometer and video data for Hydrographic Survey. Accurate location of underwater objects and surveying dive sites. Oil Pipeline site inspection and clearance. AIS Recording and Monitoring including SART for Coastguard and VTS use, AIS incident analysis in connection with Marine Accident Investigation. Voyage recording for small ships. Vessel Fleet management and tracking. Also software Simulation of NMEA, HS-NMEA, AIS data and Magnetometer outputs for testing and training on Survey, ECDIS, AIS and RADAR systems.
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Portable Navigator Server ![]() |
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Portable Navigator now includes AIS Survey 5 with incident analysis. |
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HS-NMEA and AIS Simulation version AIS-sim 5.2 |
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Software Support and Downloads Low cost PN Express |
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Shop On-Line for our Products Latest Versions of PN and AIS SIM |
*Upgrade package available for existing Portable Navigator 7.0.x users
All ESL software is now fully compatible with the latest Windows operating systems!
Free world coastline charts with the
NOAA GEODAS Desktop Coastline Extractor