Garmin GPSMAP 86sci Handheld w/inReach BlueChart g3 Coastal Charts Marine Navigation & Instruments | GPS - Track Plotter you might be able to

you might be able to distinguish between species of fish

so you can hard wire your GPS directly to a DC power source or other electronic device

FM4850 Black Box VHF Radio with GPS

Can be used for intermittent windshield wiper or horn control

B258 1kW Bronze Thru-Hull Depth/Temp w/FB - 8-Pin

Garmin GPSMAP 86sci Handheld w/inReach BlueChart g3 Coastal Charts Marine Navigation & Instruments | GPS - Track Plotter you might be able toGPSMAP 86sci Handheld with inReach & BlueChart g3 Coastal Charts Marine Handheld GPS with BlueChart g3 Coastal Charts and inReach Capabilities: Water resistant, floating design, sunlight readable 3 display and button operation provide ease of use on the water Stream boat data from compatible chartplotters and instruments to consolidate your marine system information Preloaded BlueChart g3 coastal charts include the best of Garmin and Navionics data