Respect for the crew of the KRI Nanggala of the Indonesian Navy. She disappeared after requesting permission to dive during a torpedo drill. Remains have been found on the sea bed by an underwater rescue craft and the submarine is in pieces. All 53 crew are lost.   The Nanggala is a German-built Type 209-class submarine. Widely built for navies around the world, the Type 209-class subs displace 1,395 tons underwater, have a length of 193 feet, and can do 21.5 knots submerged. The submarines are equipped with eight 533-millimeter bow-mounted torpedo tubes and can stay up to 50 days at sea. Nanggala went through a 2-year retrofit in South Korea that concluded in 2012.