Italy:
Adua-class submarine
Gondar on the surface, after an eleven-hour hunt by Scott class destroyer HMAS Stuart, in the morning of 30 September 1940
The
Gondar had sailed to perform Operation G.A. 2, the second operation meant to carry frogmen and their manned torpedoes (SLC) near Alexandria to mine shipping there; therefore it carried three SLC (in the pressure-sealed cylinders visible on the deck) and ten X MAS personnel (CV Mario Giorgini as commander, three two-men crews and three reserves). As it sailed, the submarine was redirected to Tobruk, as the RM got notice that the Mediterranean Fleet had sortied and therefore Alexandria was devoid of targets.
In the night of 29 November, the
Gondar chanced upon HMAS
Stuart, that picked her up on her ASDIC; thus began an eleven hour hunt (joined in the morning by a Short Sunderland, and at the very end by the British destroyer HMS
Diamond), with the Italian submarine unable to shake off her pursuer and suffering more and more damage. In the end, her commander (Tenente di Vascello Francesco Brunetti) deemed the situation hopeless and ordered the submarine to surface, to be scuttled.
The
Stuart opened fire but immediately ceased it as it was seen the crew was abandoning the boat; a party on a small boat was sent, hopefully to forestall the scuttling, but nothing could be done, and the
Gondar slipped beneath the waves at h0925 (for other sources, h0950). Only one crewman was killed, Marinaio Elettricista
Luigi Longobardi, who helped the commander scuttle the ship, but was killed by a bomb as he left the doomed submarine (he would receive a posthumous Medaglia d'Oro al Valor Militare).
Other than being a hard loss for the X MAS (that had lost a carrier submarine, three manned torpedoes, and ten men including her commander), this event first gave the British an inkling of the special operations the Italians were conducting, by examining pics such as these (where the SLC containers can be seen) and noticing the extra large crew captured, among which Capitano GN Elios Toschi, who had developed the SLC alongside Teseo Tesei.