U.S. sinks Iranian warship in Indian Ocean A U.S. Navy submarine carried out a torpedo strike that sank an Iranian warship in the Indian Ocean, off the southern coast of Sri Lanka Mar 4: IRIS Dena struck 80km south of city of Galle – 32 sailors have been rescued, around 140 are feared missing Indian Ocean 60 miles 100km SRI LANKA INDIA Colombo Galle Sri Lanka Iran Diego Garcia: U.S. naval base IRIS Dena: Newest frigate in Iranian naval fleet, launched in 2015. Equipped with surface-to-air missiles, anti-ship missiles, cannon, machine guns and torpedo launchers Length: 95m Beam: 11m Speed: 56km/h Displacement: 1,500 tonnes Sources: BBC, Reuters, Armedforces.eu Picture: Farsnews © GRAPHIC NEWS