After I get on a plane. Fishfinder doesn't read how deep of water I'm in. Any advice?
Post a picture of your transducer installation so those that want to help you won't have to guess what your issue is.
Humminbird Helix 12 CHIRP SI, 1198c SI, 1198c SI, ONIX 10 SI NT, Helix 7 CHIRP SI GPS G2, 360, RC-1