According to information published by Asian News International on June 2, 2021, Indonesia wishes to expand its submarine fleet to respond to Chinese incursions into its territorial waters, after Cakra-class KRI Nanggala missing.
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Nagapasa-class KRI Alugoro submarine (Picture source: SINDOnews)
Indonesia is examining agreements with France, Russia, and Turkey about the construction of new submarines, and already have a strategic partnership with the South-Korean company, Daewoo Shipbuilding, and Marine Engineering through the Nagapasa-class submarine.
The Nagapasa class is an upgraded variant of the Jang Bogo class, also known as Improved Chang Bogo. The vessels were built by the South Korean Daewoo Shipbuilding & Marine Engineering (DMSE) and the Indonesian PT PAL.
As of 2021, six ships have been planned, which were divided into two batches. Batch 1 consists of three ships and all are already commissioned. Batch 2 also consists of three ships that are in the early development stage.
The diesel-electric Nagapasa-class has a length of 61.3 metres (201 ft) with a beam of 6.3 metres (20.5 ft) and a hull draught of 5.5 metres (18 ft). She has a peak speed of 21.5 knots (39.8 km/h) when submerged and 11 knots (20 km/h) surfaced. The vessel has a maximum operating range of 10,000 nautical miles (19,000 km) and is powered by 4 MTU 12V 493 diesel generators.
Nagapasa-class is equipped with Black Shark torpedoes manufactured by Italian Whitehead Sistemi Subacquei, which has a speed of 50 knots (93 km/h; 58 mph) and a range of 50 kilometres (31 mi).
