Thanks for all of your replies. I tried twice to intercept a convoy in bad weather in the spring of '41 and was twice set on by a corvette that came straight at me out of a bank of filthy weather. After the second occurrence I twigged to the notion that he probably had radar and I broke off contact with that convoy. In my current patrol, Sept. '41 I have not yet intercepted a convoy. Radar detectors are not yet available for my boat [VIIC] but I did just upgrade to Alberich, better batteries and hydrophones. At this stage of the war I am not trying anymore to make surface attacks on convoys in low visibility conditions.
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