The rank insignia of commissioned officers. Other ranks The rank insignia of non-commissioned officers and enlisted personnel. Vessels The Croatian Navy operates mostly vessels that were captured from the disintegrating Yugoslav Navy during the Croatian War of Independence in 1991. Most of those have been extensively overhauled or modernized (such as , extensively overhauled in 1991 to match the Kralj class), especially after the navy introduced RBS-15B missiles in its service instead of Soviet P-20s that used to be standard Yugoslav equipment. However, out of five missile boats, main combatant vessels, only Šibenik served under Yugoslav flag. Some ships were captured laid or unfinished in the docks and were finished by Croatians (such as in 1992). (commissioned in 2001) as Krešimir'''s improved design and Cetina-class minelayer-landing ships were built and commissioned in Croatia (1993 and 1995, respectively). Two Helsinki-class missile boats RTOP-41 Vukovar and RTOP-42 Dubrovnik (built in 1985/6) were purchased from Finland in 2008, while a small minehunter LM-51 Korčula was built in 2006.Krešimir underwent an extensive overhaul and engine replacement in 2014 while Zvonimir, being built during international arms embargo against former Yugoslav countries in the 1990s and thus featuring a mix of Russian and western equipment, also underwent an overhaul in 2015. Navy also operates several armed landing crafts, while one school ship (BŠ-72 Andrija Mohorovičić) built in 1972 and one salvage ship (BS-73 Faust Vrančić) built in 1976 are a part of the Coast Guard. Croatian forces also operate about 20 other auxiliary vessels and crafts. The Coast Guard's backbone are four Mirna class patrol boats built during the early 1980s. Their radar equipment was modernized in 2007 and stern anti-aircraft guns have been replaced with a hoist with semi-rigid-hulled inflatable boats in 2009-2012 to help in their intercepting duties. These aging patrol boats will be replaced in 2016-9 with 5 OOB-39 project ships currently under construction in Brodosplit shipyard, which is the first major modernization of Croatian Navy in a while. Construction of the first out of the projected 5 vessels was scheduled to start in 2007, however the international tender for the construction of 5 vessels was published only on April 24, 2013. The tender called for the acquisition of a total of 5 inshore patrol boats which are to be 43.5 meters long, with a displacement of roughly 220 tons and a maximum sustained speed of at least 28 knots. They will be