On Tues. 22 Jul 1941 Italian submarine Diaspro fired four torpedoes on.....

Italian submarine Diaspro fired four torpedoes on HMS Ark Royal and HMAS Nestor escorting the Operation Substance convoy in the Mediterranean Sea; all torpedoes missed. 8 SM79s torpedo bombers and 15 bombers (SM79 and Cant Z1007) took off from Sardinia, Italy to attack the same convoy, but they would fail to locate any of the ships.

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