Stum if you paid attention to the original post you would see
That he is talking about feeding warm sea water through
Something like a radiator then blowing air through it to
Cool the boat.
He was not talking about sea water cooled aircon
Yes sea water cooling
would be more effective than air
But with that come fouling of internal sea water passages
My original post stands as FACT
Unless you can provide reasoned debate .
But what I said is what I have personally observed
So please mind your manners