OPERATOR’S MANUAL
CMA-9000 FLIGHT MANAGEMENT SYSTEM
NAVIGATION MODES
The FMS follows a hierarchical navigation mode system using TSO-approved sensors characterized by the
following decreasing priority order:
Navigation modes Sensor
GPS
TSO-C129a B1/C1 GPS sensor
DME/DME
TSO-C66c DME receiver
VOR/DME
TSO-C66c DME receiver;
TSO-C40c VOR receiver
Inertial
TSO-C4c, TSO-C6d IRS
Dead Reckoning Heading + TAS inputs
The FMS will use GPS data for navigation provided the GPS Horizontal Integrity Limit (HIL) meets the phase of
flight requirement. Otherwise, the FMS will select the next best navigation mode meeting the TSO-C115b
accuracy requirement (95% confidence factor) for the phase of flight, following the above priority order.
The civil navigation configuration option fully complies with TSO-C129a, TSO-C115b and AC20-130A. The
following navigation modes are supported:
A. GPS
GPS is the highest priority navigation mode of the FMS, and will be used when sufficient satellite coverage
exists in the phases of flight for which it is approved.
The GPS mode will be selected for navigation when its RAIM function computes a Horizontal Integrity Limit
(HIL) value which is less than the GPS Position Integrity Alert Limit (GPIAL). The latter is a function of the
current phase of flight and of the Required Navigation Performance (RNP). When the HIL exceeds the alert
limit, or if the GPS loses its RAIM function, then:
B. DME/DME
DME/DME is used in areas with sufficient DME coverage, provided the appropriate navigation database is
configured. In this mode the FMS automatically tunes the DME transceiver, acquiring distance information
from up to six DME (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 VHF NAV DESELECT page.
C. VOR/DME
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 distance and VOR bearing to determine position.
Tuned facility information is displayed on the VOR/DME STATUS page and individual stations can be
inhibited from the navigation solution from the VHF NAV DESELECT page..
Page 1-3
August 17, 2010
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