GNS 430 Pilot’s Guide and Reference
10-22
SECTION 10
AUX PAGES
• ‘Position/Map Datum’ - Configures position
readout information to the desired position format
and datum. The NavData card contains over
100 map datums to adjust the position reading,
making it conform to specific paper charts. If
using a chart based on another datum, the pilot
must set the GNS 430 to use the same datum.
Using a map datum that does not match the
charts used by the pilot can result in significant
differences in position information. If the pilot is
using the paper charts for reference only, the GNS
430 still provides correct navigation guidance
to the waypoints contained in the database,
regardless of the datum selected.
• ‘Date/Time’ - Provides settings for time format
(local or UTC; 12- or 24-hour) and time offset.
The time offset is used to define current local
time. UTC (also called ‘GMT’ or ‘zulu’) date
and time are calculated directly from the GPS
satellites’ signals and cannot be changed. To use
local time, simply designate the offset by adding
or subtracting the correct number of hours.
Setup 1 Page: Airspace Alarms
To set the airspace warning messages or
change the altitude buffer:
1) Select ‘Airspace Alarms’ from the Setup 1 Page
(Figure 10-55), using the steps described at the
beginning of this section.
Figure 10-55 Airspace Alarms Highlighted
2) Turn the large
right
knob to highlight the
‘On’/’Off’ field next to the desired airspace
type. (‘Other SUAs’ includes alert, caution,
danger, training, and warning areas.)
3) Turn the small
right
knob to select ‘On’ or ‘Off’,
as desired (Figure 10-56). Press the
ENT
Key
to accept the selection.
Figure 10-56 TWR/CTL Zone Alarm Window
4) To change the altitude buffer, turn the large
right
knob to highlight the ‘Altitude Buffers’
field (Figure 10-57). Use the small and large
right
knobs to enter the desired buffer
distance. Press the
ENT
Key when finished.
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