Commodore Yosaphat "Yos" Sudarso (24 November 1925 – 15 January 1962) was an Indonesian naval officer killed at the Battle of Arafura Sea.

At the time of his death, Yos Sudarso was deputy chief of staff of the Indonesian Navy and in charge of an action to infiltrate Dutch New Guinea.

The Dutch destroyer HNLMS Evertsen then joined the scene and sunk the RI Matjan Tutul, commanded by Sudarso.

[2] The action itself was an abject failure and General Nasution even refused to relay the bad news to Sukarno, forcing Colonel Murshid to do this in person.

The second ship is an ex-Dutch Van Speijk-class frigate named KRI Yos Sudarso (353) which is still active in the fleet today.