TM 1-1510-225-10
3A-54
3 ENRTE. ENRTE will be displayed
following XTK to show that the system is operating in
the en route approach mode.
(i) SXTK. SXTK is the selected
crosstrack distance entered by the flight crew to
provide steering to an offset course parallel to the
desired track (99.9 NM maximum).
(4) Navigation 3/4 Page. Refer to Figure
3A-28.
Figure 3A-28. FMS Navigation 3/4 Page
(a) FR, DIRECT, HOLD, PROCEDURE
TURN, DME ARC, or PSEUDO VORTAC Line. Same
as in Navigation 1/4 page.
(b) TO, AR, HP, or PT Line. Same as in
Navigation 1/4 page.
(c) NX. HDG SELECT or INTERCEPT
HDG line. Same as in Navigation 1/4 page.
(d) DRIFT. DRIFT angle is the angular
difference between aircraft heading and the direction it
is moving over the ground. Drift angle is displayed in
degrees to the right or left of aircraft heading in the
right field.
(e) VAR. The magnetic variation (VAR)
in degrees is displayed in the right field preceded by
an E (east) or a W (west). The flight management
system automatically computes the magnetic variation
between latitude N 70 00.00 degrees and latitude S 60
00.00 degrees. Manual variation may be entered.
When manual variation is entered, it overrides the
automatic computation, and is indicated by MAN.
(f) TAS. The TAS line displays the
aircraft's true airspeed in knots from the air data
computer. If true airspeed is manually inserted, MAN
will be displayed.
(g) HDG. The HDG line displays the
aircraft's heading in degrees from the aircraft's
compass system. If heading is manually inserted,
MAN will be displayed.
(h) BRG. The BRG line displays the
aircraft's bearing in degrees from the aircraft's present
position to the TO waypoint.
(i) TK. The TK line displays the
aircraft's track angle in degrees.
(5) Navigation 4/4 Page. Refer to Figure
3A-29.
Figure 3A-29. FMS Navigation 4/4 Page
(a) IDENT. The IDENT field displays the
waypoint identifier of a fix to be overflown for position
update.
(b) POS. The POS (position) fields
display the current composite latitude and longitude in
degrees, minutes, and hundredths of a minute.
(c) GPS. The GPS sensor will be listed
with the radial difference between the individual sensor
position and the composite position displayed in
nautical miles and tenths of a nautical mile.
