Originally Posted by
bob10
Been doing a bit of searching, and found some interesting stuff [ technical word ] The Indonesian submarine had been upgraded in South Korea, to be able to fire 4 torpedos at once. The torpedo they were firing was the German AEG SUT 264, a wire guided torpedo produced by Atlas Elektronik entering service in 1967. Taiwan purchased the same torpedo, and a war shot SUT fired during a training exercise from a Hai-Lung class submarine in 2003 broke it's control wires and went out of control. Here is the Indonesian Submarine's service history, or some, at least.
KRI Nanggala participated in readiness and training exercises in 2002 & 2015, and participated in an Indian Ocean exercise in 2004, where it sank a decommissioned ship. In 2012 she participated in an exercise with USS OKlahoma City. The Submarine conducted a number of intelligence gathering operations around Indonesia, one in the Indian Ocean in 1992, and East Timor, 1999, tracking the movements of International Force East Timor as it landed in the region. In 2005 the submarine was tasked with scouting, infiltrating, and hunting down strategic targets around Ambalat , after an Indonesian and a Malaysian ship were involved in a collision .
She did a two year refit in South Korea, 2010. The refit replaced much of the most of the upper structure, and upgraded its weaponry, sonar, radar, combat control and propulsion system. After the refit the submarine was capable of firing 4 torpedos at 4 different targets simultaneously and launching Exocet and Harpoon. It's safe diving depth was increased to 257 metres, and top speed increased to 25 knots.
Looking at it's intelligence gathering operations and modernisation, it's safe to assume only the best Captain and crew would be posted to the submarine. And it was arguably one of the best submarines in the S E Asian area. Which makes it even more of a mystery .