The separate track and illuminating radar (STIR) (fig. 10-14) provides the system with a longer range tracking capability than is possible with the CAS. The STIR is solely a tracking radar with no search capability. The antenna is equipped with CWI for the control of Standard missiles. The STIR is a separate radar from CAS.

Figure 10-14.-The STIR director antenna.

The STIR WCC is a single-operator console. It is identical to the CAS WCC except that the search radar controls have been eliminated. The operator is responsible for the acquisition, the tracking, and the engagement of targets by gun or missile, as ordered by the WCP.

Weapons Control Processor

The Mk 92 FCS uses the AN/UYK-7 computer set to perform all fire control calculations and threat evaluations. The WCP is the source of gun mount and missile launcher position orders and missile programming.

Data Exchange Auxiliary Console

The data exchange auxiliary console (DEAC) provides a variety of input and output capabilities for the WCP. The DEAC provides a keyboard and page printer, a paper tape reader and punch, a magnetic tape recorder/reproducer, and an output teletype communications interface. The DEAC is capable of accepting from either the WCP or the weapons support processor (WSP). (The WSP is another AN/UYK-7 computer that is part of the WDS.) The DEAC can exchange data with either the WCP or the WSP.

Planned Position Indicator Display Console

The planned position indicator (PPI) console, AN/UYA-4, serves as the weapons control officer (WCO) console. It displays selected radar and track data received from external search radars and the CAS search radar. The console may also be used, in the casualty mode, to enter track data into the WCP.

Figure 10-15 shows the equipment layout aboard an FFG-7 class ship.

WEAPONS SYSTEM MAINTENANCE

LEARNING OBJECTIVE: Recall the general requirements and procedures for weapons system maintenance and testing.

In today's SMS fleet, the' name of the game is readiness. Is the weapons system ready IN ALL RESPECTS to engage a target successfully? To achieve the optimum state of readiness, the weapons system must be maintained and tested.

At the equipment level, the gear (i.e., GMLS, computer, radar set, etc.) must be lubricated, aligned, and checked. This routine maintenance ensures individual accuracy and reliability. These general

Figure 1O-15.-Mk 92 FCS equipment configuration on FFG-7 class ship.

maintenance tasks are performed by the technicians assigned to the various work centers. (Chapter 12 discusses general maintenance in greater detail.)

At the system level, maintenance actions are concerned with alignment and electrical operability testing. The maintenance responsibility shifts to all personnel assigned to the missile division. In short, a team effort is required. Normally, the missile Fire Controlmen assume the lead in system maintenance actions. However, Gunner's Mates are equally involved.