It's a shame that Ubi did not finish this feature. But our good modders made it happen.
I am currently
in the Med near Malta and I received a message saying the the milchkuh U-459 (?) will be resuppluing uboats for a month or so. I am tempted to pass Gibraltar with my IXB and refuel near Canada...
So far I have only resupplied in Spain by ships. Never in the middle of the Atlantic. Am I crazy or what?