The three Australian submariners seconded to the Los Angeles-class nuclear attack submarine, USS Charlotte, played an active role in sinking an Iranian Navy frigate in the Indian Ocean, defence officials revealed.
The attack took place on March 4, 2026, in international waters about 20 nautical miles off the coast of Galle, Sri Lanka.
The IRIS Dena was returning to Iran after participating in multinational naval exercises in India when it was st…