Yep, they will click. You can usually hear it but if not, put your hand on it and you'll feel it.
Or jack the boat up 6 feet and construct a "kiddy pool" around it high enough that when filled with waterit will submerge the transducer. You will have to through a few fish in there as well because otherwise it's just a"bottom finder" and not a"FISH finder " haha
Can you tell I don't want to go to work this morning?