Ridzwan Rahmat, HIS Jane’s Navy International
2 August 2017
To deter foreign submarines from sailing undetected in Indonesian waters, the government is looking to install fixed underwater acoustic monitors at several locations across the archipelago, Rear Admiral Aan Kurnia, commander of the Indonesian Navy’s (Tentara Nasional Indonesia – Angkatan Laut, or TNI-AL) Western Fleet, told local reporters on 31 July.
The monitors will be similar to the sound surveillance system (SOSUS) that utilises a chain of very-low-frequency (VLF) listening posts, said the admiral. A location that is being considered for a pilot project is the Sunda Strait, which runs between the main Indonesian islands of Java and Sumatra, he added.