Always trying to infiltrate convoy rows, firing 2 torp to best target, 2 others to someone else, rear one to one behind and...escape.
If convoy is running medium or slow, and weather not too bad, i try to catch him again and repeat.
Always from front or 3/4 front.
Always submerged even at night (Kretschmer surface tactic is not doable in SH3, other than making all ships almost blind at night)
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