navigation acronyms, abbreviations and definitions - International ...

pixel picture element
The smallest element of a computer display or output that can be
controlled.
PK pseudo-kinematic
PKI Public Key Infrastructure (for encrypting/decrypting messages)
PL ice pellets (met)
PL position line (also LOP)
PL pseudolite
Platooning Auomatic close separation between cars (to increase road occupancy)
= eConvoy or eTow-bar.
PLB personal locator beacon
PLC planar lightwave circuit (eg for connecting FOGs etc)
PLD programmable logic device
PLEDM phase-state low electron drive memory
PLF passenger load factor (% of civil air available seat kilometers used)
PLGR Precision Lightweight GPS Receiver (US)
PLL phase-locked loop
PLOC prolonged loss of cantact (air comms)
PLSS Precision Location Strike System (US)
PM post meridian (after noon)
PMB Programme Management Board (Galileo)
Pmd probability of missed detection (eg in RAIM)
PMO Port Meteorological Office(r)
PMoU Paris Memorandum of Understanding (EU shipping standards)
Includes Black, Grey and White lists.
PMR private mobile radio (PMR446 is EU standard)
Up to 3 km range; no licence needed.
PMS planned maintenance system (shipping)
PMU portable mobile unit (part of PPU)
PMU processing and monitoring unit
P N
north geographic pole
PN pseudo-noise
PNAV Precise NAVigation
PND portable/personal navigation device (typically a PDA)
PND primary navigation display
PNF Polish Navigation Forum
PNM pedestrian navigation module
PNR Passenger Name Records (EU)
PNR passive noise reduction
PNR point of no return
PNR prior notice required
PNT position, navigation and timing (or position, navigation, time)
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