Depth Finder loses bottom when > 150'

[Chuck - Raymarine - Moderator]

pcasterlin,

Should you actually have a B744V installed onboard, then please note that it is a 600W transducer and the CP370 is responding with a list of 1kW transducers. Accordingly, it would be recommended that a DSM Reset (MENU->FISHFINDER SET-UP->DSM SETTINGS->DSM RESET). Should the DSM Reset operation not then permit the 600W transducer list be be presented when selecting a transducer, then it would be recommended that the CP370 be tested (to determine whether it produces the 600W transducer list) with another 600W fishfinder transducer to fault isolate the problem to the CP370 or to the transducer itself. When performing this test, there would be no need to have the transducer in the water.