St40 and p79 in hull transducer

[Chuck - Raymarine - Moderator]

Welcome to the Raymarine Forum Duane,

Due to the low power output of i40 & ST40 depth sounding instruments, it is not recommended that these instruments be used with in-hull transducers. Instead, it is recommended that the i40 and ST40 depth sounding instruments be used with compatible analog thru-hull and transom mounted instrument depth transducers (ex. E26009 P7 Thru-Hull Depth Transducer, E26027-PZ P66 Transom Mounted Depth Transducer). Alternatively, the ST40 depth sounding instrument may be replaced with an i50 Depth Instrument (ST60 instruments have been retired for several years) and the ST40 may then then be configured to repeat depth from the i50 Depth Instrument.