The Indonesian Navy (Indonesian: Tentara Nasional Indonesia Angkatan Laut, lit. 'Indonesian National Military-Naval Force', TNI-AL) is the naval branch of the Indonesian National Armed Forces. It was founded on 10 September 1945 and has a role to patrol Indonesia's lengthy coastline, to enforce and patrol the territorial waters and Exclusive Economic Zone (EEZ) of Indonesia, to protect Indonesia's maritime strategic interests, to protect the islands surrounding Indonesia, and to defend against seaborne threats.
The Navy is headed by the Chief of Staff of the Navy (Kepala Staf Angkatan Laut – KSAL or KASAL). The Indonesian Navy consists of three major fleets known as "Armada", which are Komando Armada I (1st Fleet Command) located in Tanjung Uban, Komando Armada II (2nd Fleet Command) located in Surabaya, Komando Armada III (3rd Fleet Command) located in Sorong, and one Komando Lintas Laut Militer (Military Sealift Command). The Navy also heads the Marine Corps.