High Altitude Approach - P-340

CHAPTER SEVEN

T-34C INSTRUMENTS

709.

HIGH ALTITUDE APPROACH

Reference: NIFM, Chapter 29; AFM 5137.

Amplification

Instrument Approach Procedure (IAP) charts are divided into two categories: high

altitude and low altitude. A high altitude instrument approach enables an aircraft to

transition from the high altitude structure to a position on the final approach course for

landing.

High Altitude Instrument approaches are routinely executed by high performance

military aircraft into military aerodromes for the following reasons: to maintain

efficient fuel consumption, to maintain higher TAS, and to avoid low altitude weather

until closer to the destination.

The procedures used to execute a High Altitude Instrument approach combine the

penetration pattern first learned in the Basic Instruments Stage with Instrument

Approach Procedures learned in the Radio Instruments Stage (typically a Teardrop or

Arcing approach). For this reason, High Altitude approaches normally require higher

rates of descent and indicated airspeeds than Low Altitude approaches until the

transition to BAC. Once the aircraft is in BAC, procedures for both High and Low

Altitude Instrument approaches are the same.

Procedure

Inbound to the IAF, complete the Penetration Checklist:

Oxygen . . . 100%.

ii.

Fuel state . . . check.

iii.

Defog . . . as required.

At the IAF, execute the 6 Ts:

TIME not required; time of commencing approach is not reported.

ii.

TURN turn in the shortest direction to parallel the course.

NOTE

The penetration course is depicted on high altitude IAP charts by a

bolddotted track. Figure 715.

7-24 INSTRUMENT NAVIGATION