Odd...I encountered one alone and sank her; she went down in about three minutes, if that. And she wasn't trailing the convoy, either...she was on the left-most column, third from the lead. Weird that a sub would be part of the convoy.
I guess I've sighted my big ship...now it'll probably be three more campaigns before I sight a CA or larger.
-Matt
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"It does not matter how the enemy travels, in convoy, in pairs, or alone...I will find him and sink him wherever he is."