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6/17/21 

AIM 

FIG 5

4

30 

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

2.  Precision Obstacle Free Zone (POFZ). 

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

/

4

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) 

Arrival Procedures 

5

4

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