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Old 03-30-2015, 04:01 PM
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Join Date: Mar 2015
Location: Brisbane Australia
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Default Garmin GPSMAP 557xs Dual Transducers

I just purchased a Garmin Gpsmap 557xs and standard transducer. My understanding is that this transducer is not CHIRP capable but is Down Vu capable. With this in mind I went and purchased a AirMar TM150 m CHIRP transducer. The problem is that I now am unable to use the Down Vu transducer without swapping the plugs in the back of the unit. Is there a switch I can get to easily allow me to go between the CHIRP and Down Vu transducers. I know Humminbird ( and Lowrance ( make a switch that will do this but I want to know if they will work on my Garmin without breaking it? Any advice?