The pilot needs to monitor progress during a manual or fully automatic approach.
Table 5-8 shows the SPN-41 capabilities.
SPN-41 serves as...
A feeder system for the SPN-46
An independent landing monitor (ILM) to allow the pilot to
monitor and crosscheck SPN-46 performance during a manual or
fully automatic approach
A backup for when the SPN-46 equipment fails (allows the pilot
to continue a precision approach)
Table 5-8 -- SPN-41 usage
The ARA-63 receiver/decoder is used in the aircraft in conjunction with the SPN-41
system. It is used by the pilot to obtain carrier line-up prior to entering the SPN-46
acquisition gate. The ARA-63 is also used to monitor SPN-46 automatic precision
approach performance in the aircraft.
The ancillary equipment that is normally located in the CCA control room includes the
Communications consoles Models of equipment vary, but their function is
equivalent to communications consoles used at shore stations.
Gyro repeater Indicates the ship's true course
Deck condition lights Indicate ready or fouled deck
Shipboard Air Traffic Control Communications (SATCC) Shipboard/Scalable
Integrated Voice Communications System (SIVCS) that includes Programmable
Integrated Communications Terminals (PICT)
Integrated Launch and Recovery Television System (ILARTS) and CCTV
displays Used to monitor and record aircraft landings
Vertical edge-lighted status board Used to record and display aircraft missions,
fuel states, profiles, etc.