GNC 420(A) Pilot’s Guide and Reference
7-20
SECTION 7
WPT PAGES
Modifying a user waypoint by changing
reference waypoint information:
1) With the User Waypoint Page displayed, press
the small
right
knob to activate the cursor.
2) Use the small and large
right
knobs to enter
the name of the desired waypoint and press
the
ENT
Key.
3) Turn the large
right
knob to highlight the first
reference waypoint (REF WPT) field, to change
the reference waypoint. Otherwise, continue
turning the large
right
knob to highlight
the radial (RAD) or distance (DIS) field, as
desired.
4) Use the small and large
right
knobs to change
the identifier, if desired, of the reference
waypoint (Figure 7-43). The reference waypoint
can be an airport, VOR, NDB, intersection, or
another user waypoint. Press the
ENT
Key to
accept the selected identifier.
Figure 7-43 Ref Waypoint Field Selected
5) The cursor moves to the radial (RAD) field
(Figure 7-44). Use the small and large
right
knobs to change the radial from the reference
waypoint, if desired. Press the
ENT
Key to
accept the selected radial.
Figure 7-44 Radial Field Selected
6) The cursor moves to the distance (DIS) field
(Figure 7-45). Use the small and large
right
knobs to change the distance from the
reference waypoint to the new user waypoint,
if desired. Press the
ENT
Key to accept the
selected distance.
Figure 7-45 Distance Field Selected
7) The cursor moves to the ‘Modify?’ action field.
Press the
ENT
Key to modify the waypoint.
8) Press the small
right
knob to remove the
flashing cursor.
NOTe: attempting to modify or delete a waypoint
which is currently a direct-to waypoint or the
current ‘from’ or ‘to’ waypoint in the active flight
plan, the GNC 420 alerts the pilot with the ‘Can’t
change an active waypoint’ or ‘Waypoint is active
and can’t be deleted’ message. First cancel the
direct-to or remove the waypoint(s) from the
active flight plan before modifying or deleting
the waypoint(s).
190-00140-20 Rev. K
Summary of Contents for GNC 420A
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