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OPERATOR’S
MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
Page
3-9
November 19, 2009
The default angular reference of all NAVIGATION DISPLAYS (heading, course, actual track, and bearing) is
MAGNETIC NORTH (degree symbol), and that of WIND DIRECTION is TRUE NORTH (T
symbol).
If configured, and the cockpit true/mag switch is not installed, change the navigation reference DISPLAY to
TRUE or MAGNETIC by pressing LSK 1L. In some installations, the display reference of the navigation angles
can only be controlled by a true/mag cockpit switch. In this case the MAG/TRUE DISPLAY prompt (at LSK 1L) is
removed from the SETUP page.
Upon entering the polar region (latitude above N73 or below S60), the angular reference automatically reverts to
true north and the reference toggling is inhibited.
If the angular reference was magnetic previous to entering the polar region, an advisory scratchpad message is
displayed to inform the crew of the change from magnetic to true north.
Upon the airplane leaving the polar region, the system behaviour depends upon the aircraft installation.
If the true/mag cockpit switch is not installed, the angular reference display is maintained to True and the
True/Mag toggling capability is restored. An advisory scratchpad message prompts the crew to check the angular
reference.
If the true/mag cockpit switch is installed, the FMS uses the switch to determine the angular display reference. If
the switch was set to Mag previous to entering the Polar region, the FMS automatically reverts the reference to
MAG and displays an advisory message to indicate the true to magnetic reversion.
Select time reference to LOCAL or UTC by pressing LSK 2L.
If UTC time is selected enter the local time offset from the UTC time by pressing LSK 2R. (Validity checking
ensures entry is b/-12.0 hours and steps are 0.5 hours).
Press <COORD> (LSK 3L) and select coordinates. Possible values are LAT_LONG, UTM, MGRS and
SWISS_GRID.
Only one coordinate system is active for both entry and display of positional information at any given time.
Swiss Grid position is defined as Northing and Easting coordinates up to 999 km, locating a position to within 10
meter square. The CMA-9000 FMS is able to display to full range of the Swiss Grid coordinate system.
However, the CMA-9000 FMS will only accept manual entries within the following limits:
062 - 302 (Northing)
480 - 865 (Easting)
Press <DATUM> (LSK 3R) and select appropriate datum. Fifty-one possible values can be configured (e.g.:
WGS84, ARC 1960, AUSSIE 84).
NOTE: If the SWISS_GRID coordinates are chosen, the DATUM is set to CH1903 and cannot be changed.
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