Figure 3-7.—CATCC DAIR system interlace block diagram

Figure 3-7.—CATCC DAIR system interlace block diagram. also incorporates primary radar track processing as a backup. The AN/TPX-42A(V) 12 does not replace any existing system. On amphibious-type ships, 4 indicator control groups (consoles) are located in the Helicopter Direction Center (HDC). Additional consoles are located in the Tactical Air Control Center (TACC) on LHA- and LHD-type ships. To accommodate the installation, some existing consoles may be removed from these locations, but no system is replaced. Field change kits will update currently installed CATCC DAIR systems on CV- and CVN-type ships to the (V)12 configuration. The AATC DAIR interfaces with the same systems as CATCC DAIR, with the following additional interface capabilities: Integrated Tactical System (ITAWDS) Amphibious Warfare Data Shipboard Data Multiplex System (SDMS) MAINTENANCE The organizational maintenance for the DAIR systems is done by ETs (NEC ET-1574 for DAIR, ET-1576 for CATCC DAIR, ET-1576 with 2 weeks of difference training for AATC DAIR, and ET-1578 for RATCF DAIR). You will perform both on-line and off-line tests and alignment, system operational checks and adjustments for CATCC and AATC DAIR, and periodic inspection, verification and cleaning of certain equipments in RATCF DAIR. By using BITE for on-line fault isolation, you will be able to isolate faults 3-9