Thanks to all those who offered advice and solutions for installing a depth sounder transducer inside the hull. I'm sure all would have worked, but tried the simplest approach first, which was offered by Po Chang, i.e. after choosing location, cut the bottom out of a simple plastic food container and silicone it to the hull. When dry, insert transducer, fill with water, slit cover for cord and snap cover on. Worked like a charm. The hard part was getting the transducer cord up the pipe to the flybridge - I used an electrician's snake, but man, that pipe is crowded - and, yes, I left an extra cord in the pipe for the next time. If anyone is in the market, the unit is the Humminbird 600 with digital read-out (to half a foot) and very audible shallow and deep alarms. It's easy to install, and is forgiving for up to 15 degrees of hull angle, but if you have a long run from the transducer to the head, the cord is short. I just made it, but would have been more comfortable with an extra 5-10 feet. Setting up the functions is also very easy and took about 1 minute for both alarms and keel offset. Cheers, Garrett

E16@telus.net writes: >tried the simplest approach first, which was offered by Po Chang, >i.e. >after choosing location, cut the bottom out of a simple plastic food >container and silicone it to the hull. When dry, insert transducer, >fill >with water, slit cover for cord and snap cover on. Worked like a >charm I'm sure it did, but an even simpler way would have been to just squeeze a big gob of silicon goop onto the bottom of the transducer and press it against the hull until dry. Worked for me and many other boaters. - George of Scaramouche.