nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqqv5atqz9k9c54q8c28kra6sfata0wk7w7x5gkrnde8vmxe5gt00q8mmv7s From my small retail background: The "u-boat" is referring to the type of cart. I'm not sure why that style of cart is called that, though it is very much U-shaped.

nostr:nprofile1qy2hwumn8ghj7un9d3shjtnyd968gmewwp6kyqpqqv5atqz9k9c54q8c28kra6sfata0wk7w7x5gkrnde8vmxe5gt00q8mmv7s True story, in WW2 the US had ice cream barges for morale. Could a Bacon Uboat take out a ice cream barge? https://en.wikipedia.org/wiki/Ice_cream_barge