Penetration including an Arcing Maneuver
When turning 90º onto an arc from a radial using SRT, the amount of lead (in
nautical miles) should be 0.5% of groundspeed. Do not exceed 30º AOB or
SRT, whichever occurs first. For 180 KIAS, use 1.2 NM lead as an
approximation since 30º AOB will give less than SRT.
Some high altitude approach charts have penetration instructions
printed in the profile view of the approach chart. Review and
comply with all printed instructions.
Once established inbound, comply with the remainder of the Low Altitude
Instrument Approach procedures (paragraph 623.)
High altitude approach charts do not contain landing minimums for
category B aircraft. T34s should use category C minimums.
Reference: AIM Chapter 1, KLN 900 Pilot's Guide, T-34C NATOPS
Description. The T-34C has a panel mounted KLN900 GPS system consisting of a
sensor/navigation computer, a database card and an antenna. This system is used to conduct non-
precision instrument approaches based on satellite transmitted positioning information.
General. Prior to conducting any GPS approach training it is essential that the student read
the T-34C NATOPS section 19.8 (Global Positioning System) and be thoroughly familiar with
the components and operation of the KLN900 system. The GPS is considered a supplemental
navigation system and will not be used as a sole source of IFR navigation. All aircraft SHALL
have a operable TACAN/VOR while conducting IFR operations. While the GPS system does
provide the capability to conduct GPS Arcing approaches, GPS Standard Instrument Departure
(SID) procedures and GPS STAR procedures they will not be studied in this phase of training.
Student training will only be conducted utilizing radar vectors to the final portion of a stand-alone
or overlay GPS approach.
Students must be familiar with the Turn-on and Self-Test Page
functions of the GPS at initial power up in order to verify correct
initialization and position data.
7-26 INSTRUMENT NAVIGATION