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AIM

10/12/17

5−4−54

Arrival Procedures

FIG 5−4−30

Standard and Expanded Circling Approach Radii in the U.S. TPP

2. Precision Obstacle Free Zone (POFZ). A

volume of airspace above an area beginning at the

runway threshold, at the threshold elevation, and

centered on the extended runway centerline. The

POFZ is 200 feet (60m) long and 800 feet (240m)

wide. The POFZ must be clear when an aircraft on a

vertically guided final approach is within 2 nautical

miles of the runway threshold and the official weather

observation is a ceiling below 250 feet or visibility

less than 

3

/

4

 statute mile (SM) (or runway visual range

below 4,000 feet). If the POFZ is not clear, the

MINIMUM authorized height above touchdown

(HAT) and visibility is 250 feet and 

3

/

SM. The POFZ

is considered clear even if the wing of the aircraft

holding on a taxiway waiting for runway clearance

penetrates the POFZ; however, neither the fuselage

nor the tail may infringe on the POFZ. The POFZ is

applicable at all runway ends including displaced

thresholds.

FIG 5−4−31

Precision Obstacle Free Zone (POFZ)

 

3/15/07

7110.65R CHG 2

AIM

3/29/18