of double super-charging. The engines were placed upon flexible mountings reducing the noise signature of the ship. Armament The Cassard frigates were armed with one Mk 13 launcher for the 40 Standard SM-1MR anti-air missiles. The missiles have semi-active radar homing out to at Mach 2 with a ceiling limit of . The Mk 13 single arm launchers and SPG 51 tracker/illuminators were taken off the T 47 destroyers and and refurbished. The Cassards were also provided with two Sadral sextuple launchers for 39 Mistral CIWS anti-air missiles. The Mistrals have infrared homing out to and have a warhead. They are anti-sea skimmer missiles and are able to engage incoming targets down to above sea level. For anti-ship weaponry, the class was provided with eight MM40 Exocet anti-ship missiles. The MM40 Exocet missiles are sea-skimmers with a warhead of and have a range of at Mach 0.9. The frigates also had two fixed torpedo tubes for ten L5 mod 4 torpedoes. These torpedoes have active and passive homing with a range of at . They carry a warhead and can travel to a depth of . The Cassard class was armed with a Creusot-Loire Compact /55 Mod 68 DP gun. The gun can fire 80 rounds per minute out to in an anti-surface role and against aerial targets. Initially the class was designed to have a second 100 mm main gun on the quarterdeck, however during the design phase the guns were removed and replaced with the helicopter hangar and two Sadral launchers. The vessels were also supplied with two F2 anti-aircraft guns and four machine guns. Electronics 1 DRBV26C sentry radar 1 Thales SMART-S MK2 (replacing DRBJ11B) 1 DIBV2A infra-red alert system 2 DRBN34 navigation and landing radar 1 DUBV 24C hull sonar Syracuse II satellite communication system 1 ARBR 17 radar detector 1 SAIGON radio emission detector 1 ARBB 33 jammer 2 SAGAIE NG decoy launchers 2 DAGAIE decoy launchers Ships in class They were decommissioned in conjunction with the introduction of the FREDA air defence frigates in 2021–2022. Gallery See also List of naval ship classes in service References Citations Sources Gardiner, Robert; Chumbley, Stephen & Budzbon, Przemysław (1995). Conway's All the World's Fighting Ships 1947-1995. Annapolis, Maryland: Naval Institute Press. . Saunders, Stephen (ed.). Jane's Fighting Ships, 2004-2005 (107 ed.). Surrey: Jane's Information Group. . External links Antiaériennes type F70 AA - Marine nationale official site