Garmin 300XL Pilot's Manual And Reference page 96

APPROACH NAV
SECTION
6
Flying the
Approach
The GPS APR switch will indicate 'ARM' when the
approach is armed. This will begin automatic CDI
scale transitioning from 5.0 nm to 1.0 nm as you
make your way to the FAF.
The 'Next dtk' prompt will flash to indicate the
desired course for the leg of the approach route.
Set the HSI course select to the next dtk value
when the waypoint annunciator starts flashing.
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When the aircraft is within 30 nautical miles of the destination airport, the GNC
300XL will automatically arm the approach, and the GPS APR switch will indicate an
'ARM' status.
To fly the GPS approach (without radar vectors):
1. Confirm that the GPS APR switch indicates an 'ARM' status. The CDI scale will begin a
steady transition from the 5.0 nm to the 1.0 nm scale as you make your way to the FAF. If
the approach has been disarmed and the aircraft is within 3 nm of the FAF, the GNC 300XL
will prompt you to re-arm the approach.
2. The GNC 300XL will automatically sequence to each waypoint in the approach, with CDI,
course and timing guidance to each waypoint. For each waypoint in the approach, the GNC
300XL's turn anticipation and waypoint alerting features will provide three pilot cues:
a. The waypoint annunciator will flash approximately 15 seconds before reaching the
turning point for each approach waypoint, and glow steadily approximately 2 seconds
prior to the turn anticipation point.
b. The 'Next dtk' prompt will flash in the CDI field when the 'WPT' annunciator begins
flashing. Set the HSI course select to the next dtk value when the waypoint annuncia-
tor starts flashing. Start the turn when the annunciator glows steadily.
c. The To/From indicator flag on the GPS CDI will flip momentarily to indicate you have
transitioned to the next approach leg.
For more information on turn anticipation and waypoint alerting, please refer to Section 5.
3. If a procedure turn is required:
a. 2 miles prior to crossing the waypoint outbound, set the GPS SEQ switch to HOLD.
b. At the waypoint, set the outbound course on the HSI.
c. Fly the procedure turn. After the procedure turn outbound, set the inbound course on
the HSI.
d. On the inbound intercept to the final course, fly to center the CDI.
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