Mk 99 Missile Fire Control System

destroyers.  Ships  that  do  not  use  the  AN/SPY-1  are b e i n g    u p g r a d e d    t o    a    s y s t e m    k n o w n    a s    S h i p Self-Defense System (SSDS). We will discuss SSDS in another section. For  more  than  four  decades,  the  U.S.  Navy  has developed systems to protect itself from surface and air attacks.   After   the   end   of   World   War   II,   several generations of anti-ship missiles emerged as threats to the fleet. The first anti-ship missile to sink a combatant was a Soviet-built missile that sank an Israeli destroyer in October 1967. This threat was reconfirmed in April 1988  when  two  Iranian  surface  combatants  fired  on U.S. Navy ships and aircraft in the Persian Gulf. The resulting   exchange   of   anti-ship   missiles   led   to   the destruction   of   an   Iranian   frigate   and   a   corvette   by U.S.-built Harpoon missiles. The U.S.  Navy’s defense against this threat relied on a strategy of gun and missile coordinated defense. Guns were supplemented in the late fifties by the first generation of guided missiles in ships and aircraft. By the  late  sixties,  although  these  missiles  continued  to perform well, there was still a need to improve missile technology in order to match the ever-changing threat. To   counter   the   newer   enemy   missile   threat,   the Advanced   Surface   Missile   System   (ASMS)   was developed.   ASMS   was   re-named   AEGIS   (after   the mythological shield of Zeus) in December 1969. The AEGIS system was designed as a total weapon system,  from  “detection”  to  “kill”.  The  heart  of  the AEGIS  system  is  an  advanced,  automatic  detect  and track,   multi-functional   phased-array   radar,   the AN/SPY-1. This high-powered (four-megawatt) radar can   perform   search,   track,   and   missile   guidance functions simultaneously, with a capability of over 100 targets. The first system was installed on the test ship, USS    Norton   Sound    (AVM-1)   in   1973.   Figure   2-6 shows  the  weapons  and  sensors  on  an  AEGIS  class cruiser. The system’s core is a computer-based command and   decision   element.   This   interface   enables   the AEGIS  combat  system  to  operate  simultaneously  in a n t i - a i r    w a r f a r e ,    a n t i - s u r f a c e    w a r f a r e ,    a n d anti-submarine warfare. The  AN/SPY-1  series  radar  system  works  with two fire control systems on AEGIS class ships: the Mk 99  Missile  Fire  Control  System  and  the  Mk  86  Gun Fire Control System (part of the Mk 34 Gun Weapon System).   The   Mk   86   GFCS   is   also   found   on SPRUANCE class destroyers and works with the Mk 91  Missile  Fire  Control  System.  We  will  discuss  the Mk 91 MFCS in a later section. Mk 99 Missile Fire Control System The Mk 99 MFCS controls the loading and arming of   the   selected   weapon,   launches   the   weapon,   and provides   terminal   guidance   for   AAW   (Anti-Air Warfare)   missiles.   It   also   controls   the   target illumination   for   the   terminal   guidance   of   SM-2 2-5 Figure 2-5.—USS  Ticonderoga  CG-47.


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