Garmin Boat SwitchMeet the Garmin Boat Switch, a digital switching module that redefines how you manage onboard power. Designed for boaters with compatible GPSMAP or ECHOMAP chartplotters, it lets you run lights, pumps, horn and more from your displayreducing cockpit clutter and simplifying power management. Operate up to 20 circuits from your chartplotter: Direct control of lights, pumps, horn and other systems from a compatible GPSMAP or ECHOMAP chartplotter,