OSCAR Orbiting Satellite Carrying Amateur Radio
OSD Operational Scenarios Document
OSED Operational Service and Environment Description
OSF Open System (Software) Foundation
OSF Open System Foundation
OSG Operational Services Group (MAS)
OSI Open Systems Interconnection *
OSIE OSI Environment
OST Operational Support Traffic
OSV Officier de Sécurité des Vols
OTAN Organisation du Traité de l'Atlantique Nord (FR) (= NATO)
OTD D-OTIS Delivery Message
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O
OTD Operational Target Date
OTD Other Training Device *
OTF Operational Task Force
OTF Operational, Technical and Financial Working Group
OTF (VHFOTF)
Operational VHF Task Force
OTF/BFWG Combined Operational, Technical/Budgetary & Financial Working Group
O-TGS ODS - Target Generation System
OTH (R) Over The Horizon (Radar)
OTP Overall Test Plan
OTR Operational Turn Around
OTS Off-The-Shelf
OTS Oceanic Track System
OTS Organised Track System
OTSG Operational Training and Selection Group
OTSG Operational Training and Selection Group
OTT D_OTIS Termination Message
OTV Orbital Transfer Vehicle
OUMSESTF Operational Use of Mode S Enhanced Surveillance Task Force
OUNS Operational Navigation System
OURASIE Ourasie Toolkit, software X-windows toolkit built above Xt Intrinsics layer (CENA
in-house product)
Own TCAS II equipped aircraft - source of TCAS event
P
P Process Log
P Prefix (CCITT X.121 Structure)
P Prohibited Area
P&H Press and Hold (mouse)
P,R,D Area Prohibited, Restricted, or Danger Area
P.ACCs Pairs of ACCs
p.t.t Push-to-Talk
PA Provisional Acceptance
PA Precision Approach *
PA Participating Area
PAA Plot Accuracy Analysis *
PABX Private Automatic Branch eXchange
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