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Flying A Typical Approach
The non-precision approaches available from the GNC 300 will all follow the
same general flow of events described below. Specific details and instructions relating
to each step, along with several approach examples are provided later in this chapter.
1. Create a direct-to or route with an airport as the final destination
To save time during your flight, you may wish to create a route and select
an approach before takeoff using the route catalog page.
2. Select an approach for the destination airport
An approach may be selected at any time, but must be loaded before reach-
ing the final approach fix. Once an approach is selected, the approach way-
points will replace the destination airport and the GNC 300 will provide
navigation to the Initial Approach Fix.
3. Transition to the Arm Approach Phase
The GNC 300 will automatically arm the approach 30 nm from the desti-
nation airport. The CDI scale will begin to ramp down from the 5.0 nm to
the 1.0 nm scale, and the GPS APR annunciator will indicate an ‘ARM’ sta-
tus. You’ll be prompted to enter the altimeter setting of the arrival airport.
4. Establish yourself on the final approach course
a. No procedure turn approach- no special requirements
b. Radar vectors- requires use of GPS SEQ switch to hold on
designated approach waypoint
c. Procedure turn- requires use of GPS SEQ switch to hold on
active waypoint
d. DME arc- requires use of position page to monitor distance from
reference waypoint
(continued on the next page...)
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APPROACH NAVI-
GATION
Flying the
SECTION
6
APPROACH NAV
Typical Approach
Procedures
GPS APR
ARM ACTV
GPS APR
CTV
Select the approach.
The GNC 300 will automatically arm the
approach 30 nm from the destination airport.
300 7/14/98 8:50 AM Page 77