TM 1-1510-225-10
3A-103
(a) Manual Magnetic Variation Entry.
1. NAV key – Press to display until
NAV 3 page is displayed.
2. Line select key – Press to place
cursor over the VAR field.
3. Local variation – Insert (E or W
first).
4. ENTER key – Press. (MAN) will
be annunciated adjacent to the
VAR field.
(b) Returning To Automatic Variation.
1. NAV key – Press until NAV 3
page is displayed.
2. Line select key – Press to place
cursor over VAR field.
3. BACK key – Press. AUTO? will
be displayed to advise the pilot of
the impending change.
4. ENTER key – Press.
(10)True Heading.
NOTE
This procedure must be accompanied by
the input of true heading into the system.
1. NAV key – Press until NAV 3 page
appears.
2. Line select key – Press to place
cursor over the VAR field.
NOTE
The variation is now E0 and the system will
be referenced to true north. There will be
no T annunciation to BRG, HDG, and TK.
3. E0 – Insert.
4. ENTER key – Press.
x. Loss of Power in Flight.
NOTE
This procedure should only be used in a
remote area where navaids are unavailable
and there is reason to believe that the
sensors contributing to the composite
position may be in error.
This procedure allows the pilot to initialize en
route when the aircraft has sustained a loss of power
for more than 7 seconds. The power off waypoint
(#OFF) provides a snapshot of system data at the
moment power was lost.
(1) Initialization When Power Is Restored.
NOTE
When power returns, system will perform
self-test and will display the Initialization
page.
1. DATE and GMT – Verify or enter
current DATE and GMT if required.
2. ENTER key – Press to place the
cursor over the POS field, if required.
NOTE
The coordinates are a rolling display of the
real time blended position of the sensors
being updated.
3. ENTER key – Press to accept real
time position.
4. HOLD key -Press.
5. Power off waypoint identifier – Insert
#OFF.
6. ENTER key. – Press.
7. MINUTES, LAST TK, LAST GS –
Verify and record for future use.
8. BACK key – Press to return to Hold
page.
