POFZ-
(See PRECISION OBSTACLE FREE ZONE.)
POINT OUT-
(See RADAR POINT OUT.)
POINT-TO-POINT (PTP)- A level of NRR service for aircraft that is based on traditional waypoints in their FMSs or RNAV equipage.
POLAR TRACK STRUCTURE- A system of organized routes between Iceland and Alaska which overlie Canadian MNPS Airspace.
POSITION AND HOLD- Used by ATC to inform a pilot to taxi onto the departure runway in takeoff position and hold. It is not authorization for takeoff. It is used when takeoff clearance cannot immediately be issued because of traffic or other reasons.
(See CLEARED FOR TAKEOFF.)
POSITION REPORT- A report over a known location as transmitted by an aircraft to ATC.
(Refer to AIM.)
POSITION SYMBOL-A computer‐generated indication shown on a radar display to indicate the mode of tracking.
POSITIVE CONTROL- The separation of all air traffic within designated airspace by air traffic control.
PRACTICE INSTRUMENT APPROACH- An instrument approach procedure conducted by a VFR or an IFR aircraft for the purpose of pilot training or proficiency demonstrations.
PRE-DEPARTURE CLEARANCE- An application with the Terminal Data Link System (TDLS) that provides clearance information to subscribers, through a service provider, in text to the cockpit or gate printer.
PREARRANGED COORDINATION- A standard-ized procedure which permits an air traffic controller to enter the airspace assigned to another air traffic controller without verbal coordination. The proce-dures are defined in a facility directive which ensures standard separation between aircraft.
PREARRANGED COORDINATION PROCE-DURES- A facility's standardized procedure that describes the process by which one controller shall allow an aircraft to penetrate or transit another controller's airspace in a manner that assures standard separation without individual coordination for each aircraft.
PRECIPITATION- Any or all forms of water particles (rain, sleet, hail, or snow) that fall from the atmosphere and reach the surface.
PRECIPITATION RADAR WEATHER DE-SCRIPTIONS -Existing radar systems cannot detect turbulence. However, there is a direct correlation between the degree of turbulence and other weather features associated with thunderstorms and the weather radar precipitation intensity. Controllers will issue (where capable) precipitation intensity as observed by radar when using weather and radar processor (WARP) or NAS ground based digital radars with weather capabilities. When precipitation intensity information is not available, the intensity will be described as UNKNOWN. When intensity levels can be determined, they shall be described as:
a..
LIGHT (< 30 dBZ)

b..
MODERATE  (30 to 40 dBZ)

c..
HEAVY  (> 40 to 50 dBZ)

d..
EXTREME (> 50 dBZ)
(Refer to AC 00-45, Aviation Weather Services.)