* . . . only . . .. Its all relative.
http://www.onwar.com/chrono/1941/sep41/f20sep41.htm
Italian midget subs strike Gibraltar
Saturday, September 20, 1941 www.onwar.com
In the Mediterranean... Italian midget submarines attack shipping in the harbor at Gibraltar and sink two ships.
In the North Atlantic... Heavy losses in convoys continue, but an aircraft from the British escort carrier, Audacity downs a Folfwolf Condor trying to shadow the convoy OG-74. This is the first time the carrier based aircraft have had a successful kill.