I was on the edge of my seat -really- for almost 2 hours, real time.
Tally on merchants was 2 small for 2300 tons each, and two T2 tankers, for 11000 tons each. 3 escorts destroyed. Taking out the third one sealed the deal. If I had been unable to sink at least one more of my attackers, then I would not have made it out.
They destroyed my watch tower and everything on it. They destroyed the officer's post in the stern torpedo compartment. They destroyed my AA cannons and badly damaged the foreship and deck gun.
But the snorkel survived, and I owe my escape and longevity on it.
U-73, returns to St. Nazaire.