From: Kila Hana
I'm very surprised there aren't limitations on players running transports, that aren't at war, around the oceans as recons. Is there limitations on Navy strength per ocean? That is Japanese in Atlantic, Germans/Italians in Pacific or large Brit/US in either.
I think part the naval simulation problem in the game now is in the naval supply rules. As long as a naval unit doesn't cruise, engage in combat or raid a convoy lane it can stay at sea indefinitely. However, in reality even if you are not expending naval ammunition, you are always expending something of finite quality at sea. Oil, food, consumables, major maintenance, the crew's patience. It seems this would be especially true of a transport unit with all those additional mouths aboard to feed and accommodate.
I always thought one possible solution might be for a naval unit to start randomly losing strength points if it continues to stay a sea out of port supply range beyond a certain point in time, even if it doesn't engage in combat.