Robot Raft?

OK, no category for robotic boats, so I’ll inquire here.

Anyone familiar with basic drive line (propeller shaft?) hardware for a fairly large boat (raft) model? Doesn’t have to be fast, just stealthily move on the water carrying a PTZ camera.

Standard R/C stuff can handle the electronics, maybe a BBII and make it autonomous? Not really a 'bot, but thought I’d ask. I have a friend who’s interested.

Alan KM6VV

The below servo speed hack might be of use for driving a boat prop.

youtube.com/watch?v=wCx52hT4pu8

Thanks. Maybe. I’ll probably use a straight DC “prop motor”.

Alan KM6VV