Ok, I know Civ V is no Pacific General (LONG overdue for an update... but that's a story for another time), but this business with your units being helpless in the water is getting pretty old fast. I don't mind having to keep military vessels around to screen the transports- I expect it. But if I'm going to have to try and prevent my transports from being captured, you literally need to keep a ship in every adjacent hex since even the Caravel has enough moves to slip past ZoCs if you have any openings. Having to need 6 military ships to protect 1 transport is a little excessive. The ratio gets a little better as you add more transports- 8:2, 10:3, etc., but still. In previous versions of Civ I remember transports being able to defend themselves eventually via tech- I think this needs to come back. Replaceable Parts might be a good spot for it. Or else, allow transports to stack 1 per tile with warships like you can do equivalently on land. In my last attempt to play a naval game, I had 4 Destroyers + 2 Battleships out in a ring guarding 3 transports. I had hoped I had them spaced out far enough that I could see if any enemy warships were in range to capture the transports, but I didn't see any. Sure enough though two Destroyers outside my view snaked in and took two of the transports... with almost no consequences since unpromoted ships take forever to kill each other. We need our liberty ships back, badly!