The Indonesian Ministry of Defence (MoD) is finalizing an acquisition contract of a mini-submarine built by PT Palindo Marine Shipyard. Revealed by Indonesian Navy officials to Jane's on 26 July, the information was then confirmed by a naval architect working at the shipyard, who said, “Negotiations over the procurement are still ongoing as we speak.” 

According to PT Palindo, the mini-submarine will be based on the concept that was first unveiled by the MoD’s research and development branch in November 2016 at the Indo Defence exhibition in Jakarta. The concept is a product of collaboration between PT Palindo Marine, the MoD, the Indonesian Co-ordinating Ministry for Maritime Affairs, and two Indonesian tertiary institutions Institut Teknologi Sepuluh November (ITS) and the University of Indonesia (UI).

The concept features an overall length of 22 m, an overall beam of 3 m, and a hull draught of 2.5 m. It displaces approximately 117 tonnes when surfaced, and 127 tonnes when submerged. The submarine has a maximum operating depth of 150 m, an endurance of six days, and a top speed of 10 kt when dived. It can accommodate a crew of five, with space for up to nine additional personnel.