Garmin GNX 375, Pilot'S Manual

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Planning
190-02207-02 Rev. B GPS 175/GNX 375 Pilot’s Guide 4-11
RAIM Prediction
NOTE
RAIM availability prediction is for use in areas where WAAS coverage is not
available. It is not required in areas where WAAS coverage is available.
FEATURE REQUIREMENTS
•
Active flight plan and off-route direct-to waypoint (arrival date and time)
FEATURE LIMITATIONS
FAA’s TSO requirements for non-precision approaches specify significantly greater
satellite coverage than is required during other phases of flight. As a result, RAIM
may not be available for all approaches.
RAIM prediction results are valid for up to 90 days from the current date. Arrival
dates beyond 90 days, or in the past, may not provide accurate results.
This feature predicts the availability of fault detection integrity. It cannot predict the
availability of LPV or L/VNAV approaches.
4.5 RAIM Prediction Page
Use a non-GPS based approach when RAIM is not available. To determine WAAS
availability, including for LPV approaches, visit the FAA’s NOTAM service.
RAIM Features
•
Automatically monitors RAIM during approach operations and warns when
RAIM is not available
•
Near 100% availability in Oceanic, En route, and Terminal phases of flight
•
Waypoint Identifier , Arrival Date , and Arrival Time setup keys
•
Compute RAIM key
Determine GPS coverage availability for the current location or a
specified waypoint at any time and date. RAIM performs checks to
ensure the navigator has adequate satellite geometry during flight.
The RAIM feature can help you plan for a
pending flight by confirming GPS operation
before an approach.