terminates at the approach gate or where the glideslope or other appropriate minimum altitude is intercepted. 

## PROGRESS REPORT- 

(See POSITION REPORT.) 

PROGRESSIVE TAXI- Precise taxi instructions given to a pilot unfamiliar with the airport or issued in stages as the aircraft proceeds along the taxi route. 

## PROHIBITED AREA- 

(See SPECIAL USE AIRSPACE.) 

(See ICAO term PROHIBITED AREA.) 

PROHIBITED AREA [ICAO]- An airspace of defined dimensions, above the land areas or territorial waters of a State, within which the flight of aircraft is prohibited. 

PROMINENT OBSTACLE– An obstacle that meets one or more of the following conditions: 

a. An obstacle which stands out beyond the adjacent surface of surrounding terrain and immedi- ately projects a noticeable hazard to aircraft in flight. 

b. An obstacle, not characterized as low and close in, whose height is no less than 300 feet above the departure end of takeoff runway (DER) elevation, is within 10 NM from the DER, and that penetrates that airport/heliport's diverse departure obstacle clear- ance surface (OCS). 

c. An obstacle beyond 10 NM from an airport/ heliport that requires an obstacle departure procedure (ODP) to ensure obstacle avoidance. 

(See OBSTACLE.) 

(See OBSTRUCTION.) 

PROPELLER (PROP) WASH (PROP BLAST)- The disturbed mass of air generated by the motion of a propeller. 

PROPOSED BOUNDARY CROSSING TIME- Each center has a PBCT parameter for each internal airport. Proposed internal flight plans are transmitted 

to the adjacent center if the flight time along the proposed route from the departure airport to the center boundary is less than or equal to the value of PBCT or if airport adaptation specifies transmission regardless of PBCT. 

PROPOSED DEPARTURE TIME- The time that the aircraft expects to become airborne. 

PROTECTED AIRSPACE- The airspace on either side of an oceanic route/track that is equal to one-half the lateral separation minimum except where reduction of protected airspace has been authorized. 

PROTECTED SEGMENT- The protected segment is a segment on the amended TFM route that is to be inhibited from automatic adapted route alteration by ERAM. 

## PT- 

(See PROCEDURE TURN.) 

## PTP- 

(See POINT-TO-POINT.) 

## PTS- 

(See POLAR TRACK STRUCTURE.) 

PUBLISHED INSTRUMENT APPROACH PROCEDURE VISUAL SEGMENT- A segment on an IAP chart annotated as “Fly Visual to Airport” or “Fly Visual.” A dashed arrow will indicate the visual flight path on the profile and plan view with an associated note on the approximate heading and distance. The visual segment should be flown as a dead reckoning course while maintaining visual conditions. 

PUBLISHED ROUTE- A route for which an IFR altitude has been established and published; e.g., Federal Airways, Jet Routes, Area Navigation Routes, Specified Direct Routes. 

## PWS- 

(See PREDICTIVE WIND SHEAR ALERT SYSTEM.) 

