Garmin GNS 480 Pilot's Manual page 109

1. "GPS" guidance may be used while flying outbound and on the initial portion of the procedure
turn.
2. "LOC" guidance is used on the remainder of the approach from the time you turn inbound on
the procedure turn. You will receive a message stating "AUTOSWITCH FROM GPS TO NAV."
3. The localizer frequency must be active to use "LOC" guidance at the MAP. The GNS 480 will
automatically switch back to GPS data for the missed approach.
• When flying a localizer-based approach with automatic CDI switching disabled:
1. You may select "LOC" guidance at any point on the approach prior to reaching the FAF.
2. The localizer frequency must be active to use "LOC" guidance.
Course Transitions Greater Than 270°
For procedures that have heading or course changes in excess of 270 degrees, roll steering will not be available
until you have passed the point where a turn less than 270 degree turn can be accomplished. At this point a
dashed magenta line will show the path to the next leg in the flight plan. You may engage your roll steering
autopilot at this point.
For an example where this might occur, see the Casper, WY (KCPR) departure, ALCOS3, from runway 12.
Basic Operation
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