The AN/FPN-63 has a staggered PRF and an MTI velocity offset control. When echoes
of bad weather or blocks of trees show on the scope, you may vary the MTI control to
block their echoes.
On a PAR approach, the course deviation must not exceed 30 feet or 0.2 degrees,
whichever is greater, at the runway threshold. The range information given must be
accurate within plus or minus 2 percent. Also, the PAR RADAR must be capable of
detecting an aircraft on the runway centerline extended at an altitude of 2,000 feet and
distance equal to the maximum range of the scope.
Figure 5-22 -- FPN-63 RADAR.
FACSFAC Air Control Tracking System (FYK-17)
The FACSFAC Air Control Tracking System (FACTS) is the basic system used to
provide air traffic control of the Navy's operating areas (OPAREAS). FACTS is an
automated control system that consists of computers, displays, computer programs,
peripherals, and internal and external interfaces with associated systems.
FACTS provide a multicolor display. Each of the four colors (red, orange, yellow, and
green) displays eight levels of intensity. These color differences enable the controller to
use vivid color in order to delineate such things as weather, targets, aircraft, "hot areas,"
and other map data.
The FACTS system accepts data from remote long-range and short-range surveillance
RADARs. FACTS then processes and displays the RADAR data in various
combinations of letters, numbers, symbols, and colors. The FACTS system also
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