I found two TTs in the South Atlantic in U-874 in mid '43. Sank one, other one was moving so quickly I couldn't risk trying to catch it. Two torpedoes, good for a 9.5k ton ship. There was also a South African small merchant, which sank after two torpedoes. 4.1k tons for that.
EDIT: Oh yeah, I use GW 1.1a.
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