The ships were originally armed with MBDA Exocet Block II anti-ship missiles and MBDA Seawolf air defence missiles . The main gun is an Oto Melara 76 mm ; the ship also carries two torpedo tubes , two 30 mm remote weapon stations and has a landing spot for a helicopter . As 2018 the MBDA Seawolf missile was out of service due to expired and there was plan to replace it with VL Mica In late December 2014 , KRI '' Bung Tomo '' was involved in search and recovery operations of the Indonesia AirAsia Flight 8501 which crashed off the Java Sea between the islands of Belitung and Borneo . Later in early January 2015 , KRI '' Usman Harun '' was deployed to search for the black boxes as the ship is equipped with the Thales Underwater Systems TMS 4130C1 hull-mounted sonar
Indonesia AirAsia Flight 8501
Indonesia AirAsia Flight 8501
Bung Tomo-class corvette