Garmin GNS 430AW, Pilot'S Manual & Reference

Page: 104 / 214

5 - PROCEDURES
94
DME Arc Approach
31 nm (from airport)
DO NOT USE FOR
NAVIGATION
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Billard Muni (Topeka, KS)
VOR Rwy 22
4. If you haven’t already activated the approach
(in step #2 above), be sure to do so when
cleared for the approach.
5. As you approach the IAF (LEBVY/D258G), a
waypoint alert (“LT TO 350° x S”, meaning
turn left to 350° in x seconds) will appear in
the lower right corner of the screen. As the
distance (DIS) to the IAF approaches zero, the
alert is replaced by a turn advisory (“LT TO 350°
NOW”).
6. Follow the arc, keeping the CDI needle cen-
tered. When using an autopilot, the course
select on the CDI (or HSI) must be periodically
updated with the desired track (DTK) to ensure
proper tracking through the arc. Whenever the
course select setting and desired track differ
by more than 10°, a “Set course to ###°”
message will appear on the message page.
7. The next point in the approach is an interme-
diate fix, labeled “DMARY/D025G”. As you
approach this intermediate fix, a waypoint alert
(“RT TO 205° x S”) will appear in the lower
right corner of the screen. As the distance to
this fix approaches zero, the alert is replaced
by a turn advisory (“RT TO 205° NOW”). Dial
this course into the CDI (or HSI) using the
OBS
knob and initiate a standard rate turn to this
course heading.
8. When within 45° of the final approach course
and the FAF is the TO waypoint, the 400W-
series unit will switch from terminal mode to
approach mode. CDI scaling is tightened from
1.0 NM full scale deflection to either 0.3 nauti-
cal mile or 2° full scale deflection whichever is