I've found that using the Cromwell method in combination with the Solution Solver, i can attack 2 ships in adjacent columns one after the other (so, not simultaneously, sorry, but effective!). In my method, i've had to shoot at the furthest ship first, because that's the one that crosses my firing bearing first. If i wasn't at work, i'd draw a diagram and post it to explain what i do... It would also depend on the convoy formation.
TG
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