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OPERATOR’S
MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
Page 1-8
November 19, 2009
When sensor cross-checking is configured, the FMS uses a modified algorithm to determine the mode
transitions between the INS/GPS, military GPS, and civil GPS sensors. Ultimately, the FMS will transition to
the best available navigation mode based on the information it has on each of its interfacing sensors.
* When dual GPSs are configured (civil and military from EGI), the messages which are triggered may vary
slightly (e.g. cGPS POS UNCERTAIN / mGPS POS UNCERTAIN or c
GPS NAV LOST / mGPS NAV LOST
) –
the detailed full list of messages is provided in Appendix E.
C. DME/DME
DME/DME is used in areas with sufficient DME and TACAN coverage, provided the appropriate navigation
database is configured. In this mode the CMA-9000 FMS automatically tunes the DME transceiver,
acquiring distance information from up to six DME and TACAN (DME capable) ground stations. The DME
distance is corrected for slant range error. Information on the DME facilities in use is displayed on the DME
STATUS page, and individual stations can be inhibited from the navigation solution from the DME
DESELECT page.
D. VOR/DME/TACAN
VOR/DME navigation is used in areas with sparse DME coverage where there are less than three DME
stations available. This mode combines co-located DME or TACAN distance and VOR or TACAN bearing
to determine position. Tuned facility information is displayed on the VOR/DME/TCN STATUS page.
E. Hybrid
INS/DVS
The CMA-9000 FMS uses the hybrid INS/DVS position and velocities provided by the EGI sensor for
navigation.
It sets INS/DVS Navigation solution accuracy to the EGI sensor supplied Quality Factor value for the
INS/DVS solution.
F. Inertial
This navigation mode is made available in military or civil configuration when an EGI or Inertial is configured.
The CMA-9000 FMS inertial navigation mode is based on the following parameters:
•
Present Position Latitude and Longitude;
•
North-South
velocity;
•
East-West
velocity.
The CMA-9000 FMS is using the raw INS position and velocities provided by the EGI or Inertial sensor.
G. DVS
The CMA-9000 FMS uses the Doppler Velocity Sensor position and velocities complemented with the pitch,
roll and selected heading for navigation.
It sets DVS Navigation solution accuracy to the DVS Quality Factor value for the DVS solution.
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