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R
A D A R
S
Y S T E M S
D
I V I S I O N
TM113806 (3/10)
1-5
1.1.2.5.1 RDR
Mode
Whenever RDR mode is selected, navigation information is deleted from screen. Range mark spacing
for the selected range is shown in lower left corner. RADAR and DISPLAY modes may be selected.
Aircraft heading is displayed in upper right corner of screen and GMT (Greenwich Mean Time) is
displayed in lower corner if the NAV input is connected.
1.1.2.5.2 HDG
Mode
This mode is the same as the RDR mode except that heading (HDG) information is superimposed over
the radar data.
1.1.2.5.3 NAV
Mode
Waypoint information from a long-range navigation system is processed by the radar system and the
actual positions of the waypoints are plotted on the display. In NAV mode, ground speed (GS),
distance to next waypoint (DST), and desired track (DTK) are displayed in lower left corner. Also,
wind direction, wind speed, and estimated time enroute (ETE) are displayed in the upper right corner.
The waypoint positions and course lines are continuously updated to reflect heading changes, range
changes, and distance traveled. The NAV mode may be used alone or with a weather, search, or
beacon mode. A TACAN symbol showing the collocated VOR/DME station can also be displayed.
1.1.2.5.4 NAV
LOG
Mode
The NAV LOG mode may be selected to obtain a display of flight log information programmed into
the NAV system. In the NAV LOG mode, latitude and longitude of the waypoints are displayed, as
well as the waypoints the aircraft is flying from and to. Radar (search, weather, or beacon) data are not
displayed in the NAV LOG mode.
1.1.2.6 Display Modes
Various display modes are selectable at the display via softkey or on a dedicated radar control pane,
depending upon the installation configuration. These modes are described briefly in the following
paragraphs:
1.1.2.6.1
ACFT Stabilized Mode
In the ACFT stabilized mode, the radar image is presented on the indicator display with the aircraft
heading straight toward the top of the screen. In NAV mode, heading markers and compass card are
displayed at the top center of the screen, and a deviation bar is displayed at bottom center of screen.
1.1.2.6.2
NORTH Stabilized Mode
In the NORTH stabilized mode, the radar image is displayed with North at the top center of the screen.
A North marker appears at the top, and a heading stroke points in the direction of the aircraft’s
heading.
The document reference is online, please check the correspondence between the online documentation and the printed version.
