Aviation and air traffic control terminology · MLC-0104
Aviation and air traffic control terms: O (34)
- ObstacleAn existing object, object of natural growth, or terrain at a fixed geographical location or which may be...
- Obstacle departure procedure (ODP)A preplanned instrument flight rule (IFR) departure procedure printed for pilot use in textual or graphic...
- Obstacle free zoneThe OFZ is a three-dimensional volume of airspace which protects the transition of aircraft to and from the...
- ObstructionAny object/obstacle exceeding the obstruction standards specified by 14 CFR part 77, subpart C.
- Obstruction lightA light or one of a group of lights, usually red or white, frequently mounted on a surface structure or...
- Oceanic airspaceAirspace over the oceans of the world, considered international airspace, where oceanic separation and...
- Oceanic error reportA report filed when ATC observes an Oceanic Error as defined by FAA Order JO 7210.632, Air Traffic...
- Oceanic published routeA route established in international airspace and charted or described in flight information publications...
- Oceanic transition routeAn ATS route established for the purpose of transitioning aircraft to/from an organized track system.
- ODP, see Obstacle departure procedure (ODP)
- Off courseA term used to describe a situation where an aircraft has reported a position fix or is observed on radar at...
- Off-route obstruction clearance altitude (OROCA)A published altitude which provides terrain and obstruction clearance with a 1,000 foot buffer in...
- Off-route vectorA vector by ATC which takes an aircraft off a previously assigned route. Altitudes assigned by ATC during...
- Offset parallel runwaysStaggered runways having centerlines which are parallel.
- Offshore/control airspace areaThat portion of airspace between the U.S. 12 NM limit and the oceanic CTA/FIR boundary within which air...
- OFT, see Outer fix time
- OM, see Outer marker
- On coursea. Used to indicate that an aircraft is established on the route centerline.
- On-course indicationAn indication on an instrument, which provides the pilot a visual means of determining that the aircraft is...
- One-minute weatherThe most recent one minute updated weather broadcast received by a pilot from an uncontrolled airport...
- OOP, see Operations over people (OOP)
- Open loop clearanceProvides a lateral vector solution that does not include a return to route point.
- Operational, see Due regard
- Operations over people (OOP)Operations of small unmanned aircraft over people.
- Operations specifications [ICAO]The authorizations, conditions and limitations associated with the air operator certificate and subject to...
- Operator (UAS)The owner and/or remote pilot of a UAS.
- Opposite direction aircraftAircraft are operating in opposite directions when:
- Option approachAn approach requested and conducted by a pilot which will result in either a touch-and-go, missed approach...
- Organized track systemA series of ATS routes which are fixed and charted; i.e., CEP, NOPAC, or flexible and described by NOTAM...
- OTR, see Oceanic transition route
- OTS, see Organized track system
- OutThe conversation is ended and no response is expected.
- Out of service/unserviceable (U/S)When a piece of equipment, a NAVAID, a facility or a service is not operational, certified (if required) and...
- Outer area (associated with Class C airspace)Non-regulatory airspace surrounding designated Class C airspace airports wherein ATC provides radar vectoring...
- Outer compass locator, see Compass locator
- Outer fix1. A general term used within ATC to describe fixes in the terminal area, other than the final approach fix...
- Outer fix arcA semicircle, usually about a 50-70 mile radius from a meter fix, usually in high altitude, which is used by...
- Outer fix timeA calculated time to depart the outer fix in order to cross the vertex at the ACLT. The time reflects descent...
- Outer markerA marker beacon at or near the glideslope intercept altitude of an ILS approach. It is keyed to transmit two...
- OverMy transmission is ended; I expect a response.
- Overhead maneuverA series of predetermined maneuvers prescribed for aircraft (often in formation) for entry into the visual...
- Overlying centerThe ARTCC facility that is responsible for arrival/departure operations at a specific terminal.
34 of 1,122 terms in Aviation and air traffic control terminology (MLC-0104). Request the full dataset.