OPERATOR’S
MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
Page
12-16
November 19, 2009
C. UPDATE POS 1/1 offset entered. The position is updated and CHECK QF appears if the position
difference between the sensor to be updated and the reference position is greater than the accuracy of
the sensor to be updated.
DME NAVIGATION
The DME/DME navigation mode is selected for use by the CMA-9000 FMS when higher priority navigation
modes are unavailable or not adequate for the phase of flight. For additional information refer to Section 1.
DME/DME is used in areas with sufficient DME coverage and for which the appropriate navigation database is
installed. In this mode the CMA-9000 FMS automatically tunes the on-board DME equipment acquiring distance
from up to six DME or TACAN ground stations to determine aircraft position.
CAUTION:
In DME/DME or VOR/DME modes when a VOR or a DME station is lost or acquired the FMS
system may sense a position change. This situation is similar to when the FMS switches between
navigation modes (GPS, DME/DME, VOR/DME, inertial, DR, etc.) when the integrity of a mode is
not satisfied.
When the FMS is coupled to the autopilot, this newly sensed cross track error causes lateral
steering command and an aircraft heading change as the FMS/autopilot attempts to intercept and
capture the recalculated desired track. This autopilot manoeuvre is proportionate with the calculated
track error and may be judged severe by the pilot. In this case, the pilot should disconnect the
autopilot and ensure correct flight path control, smooth out the correction to, and interception of, the
new calculated track.
1 R
2 R
3 R
4 R
5 R
6 R
UPDATE POS 1/1
R E F B R G / D I S T
>
CYUL
180
o
/1.00
N M
A C C U R
0 . 2 7
N M
N45
o
28.08 W073
o
44.48
A C C U R P O S D I F F
<
I N S / D V S
0 . 0 7 1 8 0
o
/ 1 . 0 0
I N S / D V S
1 . 1 0 0 4 5
o
/ 1 . 4 1
<
D V S
2 . 0 1 1 8 0
o
/ 1 . 0 0
<
CANCEL
CONFIRM
>
CHECK QF
1 L
2 L
3 L
4 L
5 L
6 L
This page is printed under user's responsibility
and must not be retained for reference