Re: Too hot to sail...
Through hull issues with AC from aux engine.
You should be able to easily T the existing through hull arrangement for an aux engine to a raw water AC condenser. No additional through hull propositioning should be required to cool the condensing unit under anything but full aux power drive conditions.
NOW you have to understand, these equations are for AC under SAIL not AC under your powering your A@@@ off trying to get through a tight spot with current up the Ass.
Everything is relative in this world.
Turn off the AC when your engine is needed for all power operations.