Garmin GNC 420W Pilots Guide - Page 166
Utility Sunrise/Sunset, right, Calculating sunrise and sunset times at any
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SECTION 9 AUX PAGES 3) The flashing cursor moves to the arrival date field. Use the small and large right knobs to enter the date for which the pilot wants to determine RAIM availability. Press the ENT Key when finished. 4) The flashing cursor moves to the arrival time field. Use the small and large right knobs to enter the time for which the pilot wants to determine RAIM availability. Press the ENT Key when finished. 5) The flashing cursor moves to 'Compute RAIM?' (Figure 9-44). Press the ENT Key to begin RAIM prediction. Once calculations are complete, the GNC 420 displays one of the following in the RAIM status field: • RAIM Not Available - Satellite coverage is predicted to NOT be sufficient for reliable operation during non-precision approaches • RAIM Available - Satellite coverage is predicted to be sufficient for reliable operation during all flight phases, including non-precision approaches Utility Page: Sunrise/Sunset Calculating sunrise and sunset times at any waypoint or the present position: 1) Select 'Sunrise/Sunset' from the Utility Page, using the steps described at the beginning of this section (Figure 9-45). Figure 9-45 Sunrise Sunset Highlighted 2) The flashing cursor highlights the waypoint field. Use the small and large right knobs to enter the identifier of the waypoint at which the pilot wants to determine sunrise and sunset times. Press the ENT Key when finished. To determine sunrise/sunset times for the present position, press the CLR Key, followed by the ENT Key. 3) The flashing cursor moves to the date field (Figure 9-46). Use the small and large right knobs to enter the date for which the pilot wants to determine sunrise and sunset times. Figure 9-44 'Compute RAIM?' Highlighted NOTE: RAIM computations predict satellite coverage within ±15 minutes of the specified arrival date and time. Refer to Section 9.4 for specific information regarding RAIM protection limits, also refer to Section 12 for FDE (Fault Detection and Exclusion) information. Figure 9-46 Date Field Highlighted 9-18 GNC 420(A) Pilot's Guide and Reference 190-00140-20 Rev. K
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