What would a 'A A A A' signal from an aircraft (presumably German) be?
Reading this in the Admiralty War Diaries
14.6.1941 Enemy Air Activity
Automatic A A A A Signal heard at 0331 G.M.T. Strength 2 bearing 181 degrees approx. From Port Patrick. (Port Patrick Radio 0331/14) (Lands End 0337/14).
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