Garmin GT15M-THF 12 Degree 600W SS Thru-Hull TransducerEngineered for reduced drag and optimal sonar performance on midsize fishing and cruising boats, the Garmin GT15M THF 12 Degree 600W SS Thru Hull Transducer delivers precise sonar from a flush mounted design that minimizes drag and maximizes beam orientation for clear returns. Featuring high definition mid band CHIRP, this rugged 8 pin, 600 watt stainless steel thru hull transducer defines fish arches, structure, and bottom depth with outstanding