Homebuilt ROVs Forum

Has anyone used a Sonar transducer on a ROV (not a boat), i.e. at depth?
What did you use and where did you get it?
Will a transom type transducer work at depth (30ft)? Has anyone tried it?

I have seen some ideas about using Fish Finders in a ROV. Don't know the exact tread anymore or maybe it was on Youtube.