The Iranian warship that was sunk in the Indian Ocean likely didn’t have the technology needed to defend itself against submarines.

An unidentified US submarine torpedoed and sunk the IRIS Dena, an Iranian Navy frigate, off the coast of Sri Lanka on Tuesday.

JERUSALEM — Israel Aerospace Industries (IAI) has delivered a “BlueWhale” autonomous submarine to the German Navy, the company announced Feb. 25.

February 17, 1864, was a spot in naval warfare history when the Confederate submarine H.L. Hunley struck and sank the USS Housatonic, the first successful attack by a military submarine against an enemy warship in history. Aside from history, however, the ...

India has said it allowed an Iranian naval vessel to dock in its port, days before a frigate from the Persian Gulf nation was sunk by a US submarine.

Sri Lanka's navy says around 140 people are feared missing after a military vessel went down off its southern coast.

Earlier this week, a US Navy fast-attack submarine torpedoed an Iranian warship in the Indian Ocean in an attack that appeared "remarkably similar" to the last time a Navy submarine sank an enemy