right, you where lucky!
in 1940 the escorts where still less fitted with ships. was one of the best years for the boats. there also where many "lone riders", single merchant ships - you can sink them all with your deck gun. but leave the battlefield soon, or some destroyer will meet you.
better was only the "golden era" also called "the lucky time", when operation "paukenschlag" started. the patrols of the american shore in 1941.
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