TM 55-6930-214-10
d.
The symbols art used to:
Identify target types and sites
Identify FARP landing areas
Identify PM transmitters, NDB's, and GCA sites
Identify ownship location
Identify locations of malfunction occurrences
Identify location and cause of crashes
Obtain tine checks along route of flight
Identify the 1 km points on the range lines on the ownship weapon scoring
and remote designation pages.
Identify the burst location (illumination round only)
Identify the weapon impact locations
7-36. GCA PLOTS. The ground-controlled approach (GCA) display is a stylized
representation of the precision approach radar (PAR) glideslope and centerline.
The simulated progress along both paths is displayed using a symbol for the ownship
and a track trace. The GCA display provides computer-generated command information
required to conduct the final controller portion of a simulated GCA approach. In-
structions appearing in the command box on the CRT reflect simulated aircraft
position with respect to the final approach path to the runway. The display
provides the instructor with a graphic display of the aircraft location in relation
to the glideslope and centerline for the approach runway and the alphanumerical
commands to be used by the instructor to conduct the GCA.
a. The GCA displays are on CRT pages 350 (figure 7-26) and 351 (figure 7-27).
These displays include the following information and characteristics:
Glideslope and centerline deviation track
GCA commands - correction to course, corrections to glideslope
Two scale displays: 10- and 2-nmi
GCA selection and cancellation in index and control area
b. The GCA display pages are in group 3 (GRAPHICS) and can be accessed by keying
in 350 DISPL via the data entry keyboard. Access CRT page 351 by depressing PAGE
FWD or by keying 351 DISPL. Before calling up the GCA display, the instructor can
use the tactical instrument gaming area map to vector the simulated aircraft into
the approach course corridor. The NDB can also be used to vector the aircraft into
the approach corridor. The GCA window or corridor is approximately a 4500-foot
square at 10 nmi on the approach side of the runway extended centerline. The in-
structor can use the GCA display to conduct GCA approaches to the airfield, to sup-
plement information derived from cockpit instruments and the status area display,
and to critique/debrief trainee GCA performance via the remote display or the hard-
copy feature.
C. There is only one GCA available, facility No. 52, runway 20, at the airbase.
When CRT page 350 is displayed, the index and control area contains command refer-
ence lines. To activate the GCA program, key in 01 TAB 52 ENTER on the data entry
keyboard. Line 02 permits the instructor to cancel the GCA program. GCA can also
be activated by using page 602 line 52 or page 341 line 4. Alternately, the GCA
program automatically turns off when the ownship is 15 km outbound from the base.
7-69
Change 2
