Leave the escort. Your job is to sink merchants.
Fine, if it is a lightly escorted convoy, and the escort is on a steady course, then go for it.
But otherwise ignore the escorts and maneuver into a good firing position to sink some freighters.
Wait for the lead escort to run by you.
Their SOP is to run straight for 20 mins or so, then they will pick a direction left or right of the convoys track and circle it. Do not let this freak you out. They are just fishing.
As long as they are not heading straight for you with a bone between their teeth you can be pretty sure they do not know where you are.
Again - DO NOT PANIC!
Be about two or three of thousand yards off of his track so that if he does start circling towards you he does not run straight over you.
Stay silent and patient!
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