Ted Azito wrote:

Other than turbines there are no aeroderivative engines in boats
and to me that says a whole bunch.

Saw an "airboat" going down the road today. They use lots of different
flavors of engines, including "aero" ones. Aircooled is an easier setup
than having radiators and such. One thing they all have in common is the
pusher prop. Lots of Unlimited hydroplane raceboats still run Allison /
Rolls Royce aircraft engines in them. Some event tractors (pulls) as
well. Parts are getting scarce though...

My grandfather had an air-sea-rescue boat with 3 6-71 diesels. A
competitor shipbuilder had the same boat with dual Allisons. He could
throw spray completely across the old intercoastal canal. My
grandfathers was alot more thrifty, but there was no comparision in
speed between the two...