Garmin GNC 420 - Manual (Page 166)

GNC 420(A) Pilot’s Guide and Reference 9-18
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
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.
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 9-46 Date Field Highlighted
190-00140-20 Rev. K