Im thinking ok large slow convoy - you have 4 maybe 5 fish on a evening attack run.
I might try and slam some of the screening (outside) merchants to open the gap a bit. Depending on the sucess of escape and evasion, then shadow, reload and go for a second attack in the am. Usually some decent large targets in the center. 4 escorts can pin you down if your not carfull, in calm seas even.
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