All the equipment for the DAIR system, except antennas, is installed in remote shelters, vans, control rooms, and equipment buildings. Depending on the requirements of the site, a variety of configurations could be used. RATCF  DAIR  (AN/TPX-42A(V)10) RATCF DAIR is used at major shore installations to  increase  the  capability  of  the  AN/TPX-42A(V)5 interrogator  system.  This  programmable  system  retains all the features of the DAIR system and modifies the signal-processing   chain. The  use  of  computer- processed  data  increases  controller  efficiency  and  traffic handling capability. Some of the RATCF DAIR new capabilities   include: Automatic tracking of emergency targets Audible  and  visual  alarm  when  an  aircraft descends below a preselected minimum altitude Altitude  monitoring  with  an  alarm  when  targets stray  300  feet  from  controller-assigned  altitude Semi-automatic  handoff  and  exchange  of  flight data  between  operators  and  facilities RATCF  DAIR  offers  an  expanded  display  and aircraft tracking capability and impacts other radar systems  in  the  same  way  as  DAIR  The  RATCF  DAIR interfaces with FAA enroute centers, ARTS facilities, Air Force PIDP facilities, and other RATCF DAIR facilities. CATCC  DAIR  (AN/TPX-42A(V)8) The AN/TPX-42A(V)8 is designed for air traffic control  aboard  aircraft  carriers.  Its  radius  of  coverage can extend to 200 nautical miles, although air traffic controllers are responsible only out to 50 nautical miles. Controllers cover their area of responsibility using the alphanumeric  display  of  flight  identity,  altitude,  and other pertinent information provided by this system and superimposed  over  primary  radar  video. The  CATCC  DAIR  system  accepts  trigger  and azimuth data from several shipboard radars. It also accepts ship’s data such as speed, heading, position, clock time, and barometric pressure and displays them in a tabular list on the controller’s indicator. The system automatically computes the final bearing and displays it as a vector on the indicators. A controller can put flight information into the system, via a keyboard, up to 24 hours before aircraft take-off  or  recovery.  The  system  automatically  tracks aircraft (using beacon response), matching each aircraft with the proper identification data from the flight data tabular list. As each aircraft leaves the controller’s area of responsibility, its track is passed to another CATCC control position, CIC, or ACLS/PALS as appropriate. Some of the significant operating capabilities of the CATCC  DAIR  system  include: Automatic tracking and alphanumeric identity of selected  aircraft  by  aircraft  side  numbers Independent  radar  selection  by  position The ability to accept NTDS map or to draw anew or modified map from a keyboard Independent maintenance modes for displays with  computer-driven  maintenance  patterns Built-in Test Equipment (BITE) with computer- assisted  diagnostics Figure  3-7  shows  a  typical  CATCC  DAIR  system interface diagram. CATCC DAIR interfaces with many systems   including: NTDS Keyset  Central  Multiplexer  (KCMX) ACLS/PALS IFF RD-379  recorders Radar  switchboards CATCC   DAIR   equipment   is   installed   in   the CY-7567  electrical  cabinet  and  the  MT-4939  and MT-4940  electrical  equipment  racks  located  in  the auxiliary  radar  room.  The  CATCC  operations  room  has 5  indicator-control  groups  and  5  keyboard  controllers, including  the  emergency  IFF/radar  switch. AATC  DAIR  (AN/TPX-42A(V)12) The AATC DAIR system is designed for air traffic control  aboard  LHA,  LPH,  and  LHD  amphibious  ships. Display capabilities are similar to those of CATCC DAIR,  but  new  equipment  and  software  programs provide  capabilities  needed  for  amphibious  operations. The controller is provided the identity, altitude, and status of IFF-equipped aircraft within the amphibious objective area (AOA). Information such as Air Plan Lists and ship’s data are also available for display on the controller’s  console.  AATC  DAIR  uses  the  IFF  beacon as a primary means of target detection and tracking, but 3-8