Last night on my campaign, on VH/VH, I caught three Maratha fleets with full stacks and just two naval ships in each fleet trying to make their way to the Americas. I intercepted all three, one by one and sunk them all in the middle of the Atlantic all with full stack armies in them. A very gratifying experience.
Ha ha, to the bottom of the sea with them! I did this with Spain once. Though their fleet and stack sat motionless of the coast of France for a few turns (I was Britian) before I noticed and sank it! :P