Big deal. There is hardly any German Navy left to sink him anyway. He can worry about being sunk by the Allies instead. They will be intently irritated when they figure out that he has been shadowing this convoy for two whole days. Bischoff is pretty irritated himself, it is a fast convoy that protects itself by zigzagging, and if U-691 does not zigzag in perfect unison with the ship above it, it will either be crushed by her, or blunder out of her shadow and be noticed. This has put quite a strain on skipper and crew, and quite a drain on the boat’s supply of benzedrine. But they’ve covered five hundred miles! Soon, fatal Biscay will be behind them, Brittany will be off to starboard, and Bischoff will have a choice: hang a right into the English Channel, which would be suicidal; head north between Britain and Ireland, which would be suicidal; or veer to the west around Ireland, which would be suicidal.