and on to the aircraft's control surfaces and throttle, and the aircraft reacts accordingly.
The same corrections are also fed to the CCA operator's console, including information
concerning the distance from the ship to the aircraft.
SPN-41 ICLS
The SPN-41 system is a completely independent guidance/navigation system that--
besides providing a means for monitoring--affords the pilot another method of making
an instrument approach to the ship. In this system, shipboard transmitters scan coded
microwave signals aligned on the desired approach path (see Figure 5-24). On the
aircraft's instrument panel, the information from this system is displayed on an ILS-type
cross-pointer needles display. A pilot can receive SPN-41 guidance information in
excess of 20 miles from a ship. This type of approach requires the pilot to transfer to a
visual landing aid such as the fresnel lens system prior to touchdown.
Figure 5-24 -- SPN-41 ICLS.
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