Commodore Yos Sudarso was an Indonesian naval officer killed in a battle between Dutch and Indonesian vessels on 15 January 1962. At the time of his death, Yos Sudarso was deputy chief of staff of the Indonesian Navy.
The battle in which he was killed, near Vlakke Hoek (Etna Bay) in the Arafura Sea, cost dozens of Indonesian lives and is honored by "Sea Sacrifice Day," an annual nation-wide day of remembrance. Twelve years after his death, Yos Sudarso was officially added to the register of Indonesian heroes of the Revolution. Indonesia issued a special postage stamp to commemorate his service to his country.
Yos Sudarso, along with his commodores were killed, when his ship, the KRI Macan Tutul 602 was shot. The ship was made as a target deliberately as a part of saving two other ships in the vicinity, KRI Macan Kumbang 606 and KRI Harimau 607. Due to KRI Macan Tutul has been sunk, so KRI Harimau became a monument in Taman Mini Indonesia Indah.
Indonesia's Yos Sudarso Island and Yos Sudarso Bay are named in his honor. There is also an ex-Dutch warship named KRI Yos Sudarso (ship number 353) in honor of him. It is still active in current fleet today.