I have a Garmin GPSmap 182 and the boat has a puck type hummingbird transducer (no fish finder unit) Can I interconnet the two two get a depth reading on my GPS? <br /><br />The transducer has red and black wires which I assume are the positive and gorund leads. It also has orange, purple, brown, yellow and bare leads.<br /><br />Thanks<br /><br />A.C.