Garmin’s 400S and 500S series of small combo plotter fish finders (S denotes built-in Fish Finder) all have two NMEA0183 ports and are very easy to interface our Sonar Server to.
The wire colours of the Power/Data cable are consistent across every model in the 400 and 500 series and a wiring diagram can be found by clicking here.
is it compatible with garmin fishfinder 400c which is without gps
Hi Burc,
The FF400C has a NMEA output so it is compatible. However, the iPad/tablet you utilise must have a built in GPS. If you use the Navionics app at the moment for real time GPS navigation (positioning and tracks) then you will be all OK for using Sonar Server to collect your depth data.
Best regards
PAUL