navigation acronyms, abbreviations and definitions - International ...

OAC Oceanic Area Control
OAC Operations Advisory Committee (CAA)
OACC Oceanic Area Control Centre
OANS onboard airport navigation system
OAS Open Access Service (Galileo basic service, free of charge)
OASIS Operational and Supportability Implementation System (FAA)
OAT operational air traffic
OAT outside air temperature
OBDS onboard diagnostic system
OBE on-board equipment
OBI omni-bearing indicator
OBIA object-based image analysis
OBO ore/bulk/oil (carrier)(ship)
OBS omni-bearing selector
OBT on-board terminal
OBU on-board unit (in a vehicle)
OCA obstacle clearance altitude
OCA Oceanic Control Area
OCC Operations Control Centre (Inmarsat)
OCG Operations Coordination Group (EUROCONTROL)
OCH obstacle clearance height (for landing aircraft)
OCIMF Oil Companies International Marine Forum
OCR optical character recognition
OCS operational control system
OCS outer continental shelf
OCX Advanced Control Segment (GPS update from 2010)
Includes anti-jam, improved security, accuracy and reliability.
ODA Olympic Delivery Authority (UK for 2012)
ODAS Ocean Data Acquisition System
ODBC open database connectivity (allows databases to exchange data)
ODBMS Object Database Management System
ODL opposite direction level (ATC)
ODN Ordnance Datum Newlyn (UK system for orthometric height amsl)
ODR Operations Definition Review (EGNOS)
ODR output data rate
ODTS (OD&TS) Orbit Determination and Time Synchronisation (Galileo sys)
OECD Organisation for Economic Cooperation and Development
2004 - Australia, Austria, Belgium, Canada, Czech Republic,
Denmark, Finland, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Japan, South Korea, Luxembourg, Mexico,
Netherlands, New Zealand, Norway, Poland, Portugal, Slovakia,
Spain, Sweden, Switzerland, Turkey, UK and US.
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March 2012