In this mode, the DGNS provides real-time
landing guidance information to the HSI indi-
cator. To display course deviation indication
(CDI) on VSI and HSI, depress then release
the DPLR GPS button on the HSI Mode Se-
j. Procedure for Transferring Stored Destination/Tar-
get Data From One Location to Another.
The following procedure allows the operator to transfer
stored destination/target data from one destination/tar-
get location to another destination location. The trans-
ferred data consists of destination name/ICAO identifier,
location, variation, and landing information. For illustra-
tive purposes only, it is assumed that the operator wants
to put the coordinates of stored target 97 into the location
for destination 12.
Set DISPLAY switch to WP/TGT position.
Depress keys 9 then 7.
Depress KYBD key, depress keys 1 then 2.
Location name/ICAO identifier, variation, and
landing data may be deleted by first display-
ing the waypoint, depressing KYBD key, then
the ENT key.
Depress ENT key.
k. Operation During and After a Power Interruption
During a power interruption, the stored destination and
target data and present position are retained by non-vol-
atile RAM inside the CDU. This makes it unnecessary to
reenter any navigation data power returns. GPS satellite
data are also retained by a rechargeable battery inside
the SDC. This makes it unnecessary to reload the crypto
key or wait for the collection of any almanac. Navigation
will be interrupted during the absence of power; however
the present position will be updated when the GPS data
becomes valid provided the DGNS mode has not been
selected as Doppler only. The pilot will have to re-enter
the GPS operating mode (M or Y) using a single key (5
In the event the CDU is initialized, the display will indicate
only EN when the CDU is operated. This is an indication
to the operator that previously stored data has been lost
and that spheroid/variation, destinations, and calibration
data must be entered. Present position needs to be en-
tered only if Doppler only mode has been selected. The
KYBD key must be depressed to clear the EN.
The computer initializes to the following: operating mode
to combined, present position variation to E000.0, des-
tinations and associated variations to a non-entered
state, wind speed (water motion) and sea current speed
to 000, DATUM: 00, present position to N45_
00.00E000_ 00.00 (until updated by GPS), target store
location to 91, along track calibration correction to 00.0
percent, and magnetic compass deviation corrections to
000.0 degrees. The following data must be entered:
Depress KYBD key.
Set MODE switch to OFF momentarily, to
LAMP TEST for approximately one second, and then to
MGRS or LAT/LONG.
Select GPS or Y mode.
Select DGNS operating mode if other than
Enter present position if Doppler only has
Enter each destination and its associated
l. Procedure for Display Aircraft heading, Pitch, and
roll (Maintenance Function)
Set the CDU mode switch to test and ob-
serve the CDU test mode display.
After the Doppler test is completed depress
the ENT key.
Observe the CDU display. The top indicates
in degrees and tenths of a degree, aircraft system head-
ing, pitch, and roll.
Table 3-3-4. Map Datum Codes.
AUSTRALIAN GEODETIC 1966
CAMP AREA ASTRO