A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

Precision approach procedure - A standard instrument approach procedure in which an electronic glideslope/or other type of glidepath is provided ; e.g., ILS, PAR, and GLS.

Precision approach path indicator - PAPI - a visual aid that provides guidance information to help a pilot acquire and maintain the correct approach (in the vertical plane) to an airport or an aerodrome. It is generally located beside the runway approximately 300 meters beyond the landing threshold of the runway.

Pressure-altitude - An atmospheric pressure expressed in terms of altitude which corresponds to that pressure in the Standard Atmosphere

Primary frequency - The radiotelephony frequency assigned to an aircraft as a first choice for air-ground communication in a radiotelephony network

procedure turn - PT - A maneuver in which a turn is made away from a designated track followed by a turn in the opposite direction to permit the aircraft to intercept and proceed along the reciprocal of the designated track

Note 1: Procedure turns are designated "left" or "right" according to the direction of the initial turn

Note 2: Procedure turns may be designated as being made either in level flight or while descending, according to the circumstances of each individual approach procedure.

No procedure turn - NPT -

Procedure turn inbound - That point of a procedure turn maneuver where course reversal has been completed and an aircraft is established inbound on the intermediate approach segment or final approach course. A report of "procedure turn inbound" is normally used by ATC as a position report for separation purposes.