Figure 4-2 is a pictorial diagram of how the search radar  subsystem  interfaces  with  the  combat  direction system  subsystem. COUNTERMEASURES SYSTEMS The  countermeasures  subsystem,  a  stand-alone subsystem, provides the combat system with detection, surveillance,  identification,  and  engagement capabilities against threats the ship encounters during a mission. The  countermeasures  subsystem  is  divided  into three   functional   groups:   the   electronic   support measures (ESM) group, the acoustical countermeasures group  (ACM),  and  the  electronic  countermeasures (ECM)  group. The ESM group supports actions taken to search for, intercept,   locate,   record,   and   analyze   radiated electromagnetic  energy  in  support  of  tactical  operations. Thus,   ESM   equipment   provides   a   source   of countermeasures   information   required   for   threat detection,  warning,  avoidance,  and  target  acquisition. The ESM group also receives triggers from shipboard emitters,  and  develops  the  blanking  pulses  required  to prevent the emitters from interfering with operating countermeasures  equipment.  The  major  components  of the  ESM  group  are  the  Electronic  Countermeasures  Set AN/SLQ-32(V)2   and   the   Blanker-Video   Mixer AN/SLA-10B. The   ACM   group   provides   deception   devices designed to provide a false or misleading acoustical target for incoming acoustical homing torpedoes. The major components of the ACM group arc the Torpedo Countermeasures   Transmitting   Set   AN/SLQ-25 (NIXIE) and the PRAIRIE/MASKER SYSTEM. The ECM group provides false or misleading targets for   incoming   missiles   or   weapons.   In   conducting mission assignments, the ship will use decoy systems primarily  as  a  defensive  measure.  The  major  component of  the  ECM  group  is  the  Super  Rapid  Bloom  Offboard Chaff (SRBOC) Mk 36 Mod 1. CLOSE-IN WEAPON SUBSYSTEM (CIWS) The Close-In Weapon System (CIWS) Mk 15 Mod 1 provides the final defense against antiship cruise missiles (ASCM) as part of the Navy’s defense-in-depth concept.  The  CIWS  will  engage  and  destroy  ASCMs  or aircraft that penetrate a ship’s primary defense envelope. The CIWS also provides ASCM and antiair defense for ships   operating   in   other   than   defense-in-depth situations.  The  CIWS  is  essentially  a  stand-alone weapon system consisting of the Weapon Group Mk 16 Mod 1, Remote Control Panel (RCP) Mk 340 Mod 1, and Local Control Panel (LCP) Mk 339 Mod 2. The CIWS may be operated in either the antiair warfare (AAW)  automatic  mode  or  the  AAW  manual  mode. UNDERWATER  WEAPON  SUBSYSTEM The underwater weapon subsystem provides the combat  system  with  an  engagement  capability  against subsurface threats. The underwater weapon subsystem is  composed  of  the  following  equipment: 1. 2. 3. 4. Sonar  Set  AN/SQS-56 Tactical  Towed  Array  Sonar  (TACTAS) Torpedo Tubes Mk 32 Mod 5 Control  Panel  Mk  309  Mod  0 LIGHT AIRBORNE MULTIPURPOSE SYSTEM (LAMPS) The  light  airborne  multipurpose  system  (LAMPS) is  a  combined  helicopter-ship  subsystem  capable  of supporting  both  combat  and  noncombat  missions.  The primary combat missions are antisubmarine warfare (ASW) and antiship surveillance and targeting (ASST). The secondary, noncombat missions include search and rescue, medical evacuation, vertical replenishment, and utility operations. The  LAMPS  consists  primarily  of  an  SH-60B Seahawk  helicopter.  The  LAMPS  helicopter  is  an all-weather,  airborne  platform  capable  of  carrying various  detection  devices,  including  a  sonobuoy receiver-transmitter  for  transferring  sonobuoy  data  to the ship. Shipboard LAMPS equipment consists of a Telemetric Data Receiving Set AN/SKR-4A (SKR-4) and a Sonar Signal Processing Set AN/SSQ-28. MISSILE/GUN WEAPON SUBSYSTEM The  missile/gun  weapon  subsystem  enables  the combat system to deliver to a target an SM-1 missile warhead or a 76-mm gun projectile. This subsystem uses internally  and  externally  generated  raw  data  and processed  data  to  provide  the  combat  system  with weapon  assignment,  direction,  and  firing  capability.  The missile/gun  subsystem  supports  the  combat  system antiair warfare (AAW), surface warfare (SUW), and antisubmarine warfare (ASW) missions. 4-3