BendixKing GC 360A - Manual (Page 12)

In any of the three navigation
modes, the GC 360A offers a vari-
ety of pilot-selectable functions
designed to assist in navigation
decision-making and altering pro-
grammed flight plans while en
route. Basic control information is
included in “Modes and Functions”
on page 4. Following are amplified
descriptions of the GC 360A’s more
powerful functions.
1. Cursor Check-Off
Removes and replaces Nav 1 and
Nav 2 course lines on the radar
screen. Also summons the LNAV’s
waypoint page and sends it lat/lon
information when the joystick-con-
trolled waypoint Joystick Waypoint
is on the radar screen.
2. Reference
Collocated with the cursor position
keys, the Reference keys com-
mand the GC 360A to display on
the radar indicator up to 10 Vortacs,
VOR/DMEs and Tacans near the
aircraft’s position.
As with cursor position control dur-
ing checklist operations, the
Reference key is “circular”.
Pressing the Reference “up” key
once causes the GC 360A to dis-
play nearby high-altitude, low-alti-
tude and terminal navaid refer-
ences on the indicator. Pressing the
Reference “up” key a second time
removes terminal navaids from the
indicator; a third press removes
low-altitude navaids, while pressing
the Reference “up” key a fourth time
clears the indicator of all reference
navaids.
The Reference “down” key oper-
ates in the same manner, but steps
through the navaid sequence in the
opposite order.
The Reference function generates
a small green annunciator, in the
form of the letter “R,” with one, two
or three dashes stacked vertically to
its immediate left to show whether
high altitude, high and low-altitude,
or high-altitude, low-altitude and ter-
minal navaids are on the screen.
3. 360˚ Circle Display
The 360˚ key shifts the radar dis-
play from a sector scan to a full cir-
cle, and back again, allowing you to
view navigation data in all quad-
rants. Weather information remains
limited to its normal 90˚ or 120˚
scan. A large, color-coded dot -
cyan for Nav 1, yellow for Nav 2 -
will appear on the compass circle to
mark the current RMI bearing to the
active waypoint. The GC 360A
must be shifted to the 360˚ circle
display to show wind information.
11
NAVIGATION FUNCTIONS