text: Chapter 1
  port opening — The ability to establish, initially operate and facilitate throughput for ports of debarkation to
  support unified land operations. (ADP 4-0)
  port support activity — (DOD) A tailorable support organization composed of mobilization station assets that
  ensures the equipment of the deploying units is ready to load. (JP 3-35) Also called PSA. See also support.
  position area for artillery — An area assigned to an artillery unit to deliver surface to surface fires. (FM 3-90)
  Also called PAA.
  position of relative advantage — A location or the establishment of a favorable condition within the area of
  operations that provides the commander with temporary freedom of action to enhance combat y or influence
  the enemy to accept risk and move to a position of disadvantage. (ADP 3-0)
  positive control — (DOD) A method of airspace control that relies on positive identification, tracking, and
  direction of aircraft within an airspace, conducted with electronic means by an agency having the authority and
  responsibility therein. (JP 3-52)
  positive identification — (DOD) An identification derived from observation and analysis of target characteristics
  including visual recognition, electronic support systems, non-cooperative target recognition techniques,
  identification friend or foe systems, or other physics-based identification techniques. (JP 3-01) Also called PID.
  positive inbound clearance — The process of the origin movement control team contacting the destination
  movement control team before a transportation movement release is created to ensure the destination unit
  has the capability to receive the shipment, considering materials handling equipment, storage and personnel
  available. (ATP 4-16) Also called PIC.
  precision munition — A munition that corrects for ballistic conditions using guidance and control up to the
  aimpoint or submunitions dispense with terminal accuracy less than the lethal radius of effects. (FM 3-09)
  precision smart munition — A munition or submunition that autonomously searches for, detects, classifies,
  selects, and engages a target or targets. A precision smart munition has a limited target discrimination
  capability. (FM 3-09)
  precision-guided munition — (DOD) A guided weapon intended to destroy a point target and minimize
  collateral damage. (JP 3-03) Also called PGM.
  preparation — Those activities performed by units and Soldiers to improve their ability to execute an operation.
  (ADP 5-0)
  preparation fire — A brief, intense bombardment on selected targets or a prolonged effort over time covering a
  large number of targets. (FM 3-09)
  preparation of the environment — An umbrella term for operations and activities conducted by selectively
  trained special operations forces to develop an environment for potential future special operations. (FM 1-
  02.1) Also called PE.
  pre-position — (DOD) To place military units, equipment, or supplies at or near the point of planned use, or at a
  designated location, to reduce reaction time and to ensure timely support of a specific force during initial
  phases of an operation. (JP 4-0)
  presumptive identification — The employment of technologies with limited specificity and sensitivity by
  general-purpose forces in a field environment to determine the presence of a chemical, biological, radiological,
  and/or nuclear hazard with a low level of confidence and degree of certainty necessary to support immediate
  tactical decisions. (ATP 3-11.37)
  primary position — The position that covers the enemy’s most likely avenue of approach into the assigned
  area. (FM 3-90)
  principle — A comprehensive and fundamental rule or an assumption of central importance that guides how an
  organization approaches and thinks about the conduct of operations. (ADP 1-01)
  principles of operations — Time-tested general characteristics of successful operations that serve as guides
  for the conduct of future operations. (ADP 1-01)
  priority intelligence requirement — (DOD) An intelligence requirement that the commander and staff need to
  understand the threat and other aspects of the operational environment. (JP 2-0) Also called PIR.
  priority of fires — The commander’s guidance to his staff, subordinate commanders, fire support planners, and
  supporting agencies to organize and employ fire support in accordance with the relative importance of the
  unit’s mission. (FM 3-09)
  priority of support — A priority set by the commander to ensure a subordinate unit has support in accordance
  with its relative importance to accomplishing the mission. (ADP 5-0)
  priority target — A target, based on either time or importance, on which the delivery of fires takes precedence
  over all the fires for the designated firing unit or element. (FM 3-09)