GPS (RVFAC) Procedures

T-34C INSTRUMENTS

CHAPTER SEVEN

flight. The OBS mode is usually needed at some point during a missed approach and is always

required to fly the missed approach holding pattern.

GPS (RVFAC) Procedures

Select and load desired approach into the active flight plan (APT 8 page, right side).

Select cockpit navigation source to GPS.

Tune and ID all available ground based NAVAIDS for back up.

NOTE

The double RMI needle now provides information from the KLN

900, but the NACWS display continues to indicate DME from the

selected TACAN or VOR/DME.

Brief the approach. If required, determine step-down altitudes using the profile view

on the approach plate.

WARNING

The GPS always displays distance to the active waypoint, which

is different than the DME distance from the navaid on the

instrument approach procedure. Pilots must exercise extreme

caution to preclude either a dangerously early or late descent on

final. DO NOT confuse GPS distance with DME.

Verify APR ARM is annunciated within 30 NM of the airfield.

NOTE

The CDI scale factor will smoothly change for + 5.0 NM to + 1.0 NM

full deflection at this time. The CDI scale is in NM not degrees.

Press ALT to verify the altimeter setting in the KLN900.

Once being vectored to final select OBS mode.

Select the FAWP as the Active WPT:

On the Flight Plan Page, use the CRSR to highlight the FAWP (WPT-f).

ii.

Press "DIRECT TO" and confirm the selection by pressing "ENT".

iii.

Select the SUPER NAV 5 display, set the scale to AUTO and verify the FAWP

is the Active WPT indicated in the top left corner of the screen.

INSTRUMENT NAVIGATION 7-37