So I have an RL80C, with (2) ST60's (one on fly bridge other in salon at lower helm) along with an ST8001 auto pilot with a course computer. I read by a raymarine moderator that i could get the sounder, I got the dsm300, and be able to use the RL80C as a fishfinder. My question is I have 3 transducers, 1 is a P120 ST800, i believe thats temp and speed, another is a B22 (thats all thats on the tag) and the other airmar has no tags at all. Which transducer do I need fo fishfinder capabilities? Will the P120 worK? Please advise Im desperate =)..
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