[CA] Erratic sonar readings

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Matty-B,

The P48 Widebeam Transducer is designed and recommended for inland applications (rivers and shallow lakes), as its power output is limited to 100W and only transmits at 200kHz. Accordingly, one would expect that it should function satisfactorily in shallow waters, it would be expected to lose and/or be unable to acquire bottom when used in deeper waters. When fishing the depths which you have specified, a 600W transducer such as the A102138 P58 600W 50kHz/200kHz would be recommended.