An American submarine, presumably a Virginia-class submarine, sank the Iranian frigate Dena, a Mowj-class submarine, in the Indian Ocean as it returned from a naval parade in India. The frigate, reportedly a destroyer, belongs to the Iranian Navy. The 1,500-ton Dena, launched in 2015, is technical information available on the screen and in the video description. The Iranian frigate Dena was sunk by a presumably American 533-mm Mk48 ADCAP torpedo fired from a Virginia-class nuclear-powered attack submarine off the coast of Sri Lanka.
Mowj-class frigate Dena
Displacement: 1,300 to 1,500 tons.
Length: 95 meters.
Width: 11.1 meters.
Draft: 3.25 meters.
Propulsion: Two 10,000 hp (7,500 kW) engines and four 740 hp (550 kW) diesel generators.
Speed: 30 knots.
Crew: Up to 180.
Armament:
76 mm DP rapid-fire automatic cannon;
40 mm Fath anti-aircraft cannon (a Bofors copy);
4 C-802 / Noor anti-ship missiles;
2 20 mm Oerlikon cannons;
2 triple 324 mm light torpedoes;
4 Sayad-2 SAM systems.
Aviation equipment: Bell 212 anti-submarine helicopter.
Radar: Asr, covers 360 degrees within a 300 km radius.