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