David Axe has the story of the Santa Fe, an Argentine diesel-electric submarine that fought off a swarm of British helicopters before succumbing:
Cut off and incommunicado, the Santa Fe’s crew fought back against the swarms of Wessex, Wasp and Lynx helicopters, using only the firearms they had on board and some ancient anti-tank rockets belonging to an embarked commando team. “They prevented the helicopters from flying right over us,” Bicain recounts.
But the Santa Fe was cornered. In addition to the depth charges and torpedoes, the British choppers fired anti-ship missiles and even their machine guns. An AS-12 missile punched right through the sub’s hull without exploding, taking off one sailor’s leg. The Santa Fe slowly sank while desperately steaming towards land and safety. Finally it struck the shallow seabed. The frigates that had launched the helicopters were soon within sight. The jig was up, and at 5 p.m., Bicain surrendered.