I've found attacking from the surface useful only if my first torp didn't sink the target, then I surface and use my now greater speed and manoeuvrability to get ahead, swing round and loose another. I don't care if he sees me or not since he's taking evasive action anyway. I've only used this on lone merchants though, trying it on a convoy would be suicidal in my book

. Anyone attempted a surface convoy attack?
What Salvadoreno said may have something in it though, handy in rough seas with extra stability of the UZO....need to give it a try

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