CLOSE-IN WEAPON SYSTEM RADAR

1986. Following the evaluation, the upgraded system, identified as Mk 92 Mod 6 was installed in USS Ingraham (FFG-61). The Mk 92 Mod 6 will replace the Mod 2 systems in the fleet. The Mk 92 Fire Control System (FCS) is deployed on board FFG-7 PERRY class ships in conjunction with the Mk 75 Naval Gun (fig. 2-12) and the Mk 13 Guided Missile Launching System (fig. 2-13). The Mk 92 FCS integrates target detection with multichannel antiair and antisurface missile and gun systems control, engaging up to four targets simultaneously. The Mk 92 “track-while-scan” radar uses the Combined Antenna System (CAS), which houses a search antenna and a tracker antenna inside a single egg-shaped radome (fig.2-14). A Separate Target Illumination Radar (STIR) (fig. 2-14) designed for the PERRY class Mk 92 FCS application provides a large diameter antenna for target illumination at ranges beyond CAS capabilities. A Mod 1 version of the Mk 92 system is installed on the US Coast Guard’s WMEC (Medium-Endurance Cutter, figure 2-15) and its WHEC (High-Endurance Cutter). This version can track one air or surface target using the monopulse tracker and two surface or shore targets using track-while-scan data from CAS. Using STIR, the Mod 2 system on FFG-7 class frigates can track an additional air or surface target. CLOSE-IN WEAPON SYSTEM RADAR The Mk 15 Phalanx Close-In Weapon System (CIWS — pronounced “sea-whiz”) is a stand-alone, quick-reaction time defense system that provides final defense against incoming air targets. CIWS will a u t o m a t i c a l l y e n ga g e a n t i - s h i p m i s s i l e s a n d high-speed, low-level aircraft that penetrate the ship’s primary defenses. As a stand-alone weapon system, CIWS automatically searches for, detects, tracks, evaluates for threat, fires at, and assesses kills of targets. A manual override function allows the operator to disengage a target, if necessary. The search and track radar antennas are enclosed in a radome mounted on top of the gun assembly (see 2-10 Figure 2-12.—Mk 75 Naval Gun system. Figure 2-13.—Mk 13 Guided Missile Launcher system.