Garmin Airmar B75M 12° – thru-hull CHIRP transducer, bronze

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Garmin Airmar B75M 12° – thru-hull CHIRP transducer for depth and temperature

The Airmar B75M is a thru-hull transducer made of bronze, permanently mounted in the boat hull, intended to work with fish finders that support broadband CHIRP sonar, for example with the Garmin GSD 26 module. The variant described here has a deadrise angle of 12°, which matches the typical deadrise of many V-hulls, popular in motorboats.

Installation and compatibility

The transducer has an 8-pin connector, through which it connects directly to a fish finder or the Garmin Marine Network, to which it sends both depth and water temperature readings. Thru-hull mounting means seating the transducer in a hole in the bottom of the boat, which usually gives a cleaner signal than solutions glued from the inside.

Operation in CHIRP mode

CHIRP sonar support lets you choose between a classic, single frequency band and broadband scanning, which translates into clearer separation of targets underwater with a compatible fish finder.

Specifications