Order 7110.65P, Air Traffic Control, with changes

8/5/04Pilot/Controller GlossaryOOBSTACLE− An existing object, object of naturalgrowth, or terrain at a fixed geographical location orwhich may be expected at a fixed location within aprescribed area with reference to which verticalclearance is or must be provided during flightoperation.OBSTACLE DEPARTURE PROCEDURE (ODP)−A preplanned instrument flight rule (IFR) departureprocedure printed for pilot use in textual or graphicform to provide obstruction clearance via the leastonerous route from the terminal area to the appropriateen route structure. ODPs are recommended forobstruction clearance and may be flown without ATCclearance unless an alternate departure procedure(SID or radar vector) has been specifically assignedby ATC.(See IFR TAKEOFF MINIMUMS ANDDEPARTURE PROCEDURES.)(See STANDARD INSTRUMENTDEPARTURES.)(Refer to AIM.)OBSTACLE FREE ZONE− The OFZ is a threedimensional volume of airspace which protects forthe transition of aircraft to and from the runway. TheOFZ clearing standard precludes taxiing and parkedairplanes and object penetrations, except for frangibleNAVAID locations that are fixed by function.Additionally, vehicles, equipment, and personnelmay be authorized by air traffic control to enter thearea using the provisions of FAAO 7110.65, Para3−1−5, VEHICLES/EQUIPMENT/PERSONNELON RUNWAYS. The runway OFZ and when applicable,the inner-approach OFZ, and the inner-transitionalOFZ, comprise the OFZ.a. Runway OFZ. The runway OFZ is a definedvolume of airspace centered above the runway. Therunway OFZ is the airspace above a surface whoseelevation at any point is the same as the elevation ofthe nearest point on the runway centerline. Therunway OFZ extends 200 feet beyond each end of therunway. The width is as follows:1. For runways serving large airplanes, thegreater of:(a) 400 feet, or(b) 180 feet, plus the wingspan of the mostdemanding airplane, plus 20 feet per 1,000 feet ofairport elevation.2. For runways serving only small airplanes:(a) 300 feet for precision instrument runways.(b) 250 feet for other runways serving smallairplanes with approach speeds of 50 knots, or more.(c) 120 feet for other runways serving smallairplanes with approach speeds of less than 50 knots.b. Inner-approach OFZ. The inner-approach OFZis a defined volume of airspace centered on theapproach area. The inner-approach OFZ applies onlyto runways with an approach lighting system. Theinner-approach OFZ begins 200 feet from the runwaythreshold at the same elevation as the runwaythreshold and extends 200 feet beyond the last lightunit in the approach lighting system. The width of theinner-approach OFZ is the same as the runway OFZand rises at a slope of 50 (horizontal) to 1 (vertical)from the beginning.c. Inner-transitional OFZ. The inner transitionalsurface OFZ is a defined volume of airspace along thesides of the runway and inner-approach OFZ andapplies only to precision instrument runways. Theinner-transitional surface OFZ slopes 3 (horizontal)to 1 (vertical) out from the edges of the runway OFZand inner-approach OFZ to a height of 150 feet abovethe established airport elevation.(Refer to AC 150/5300-13, Chapter 3.)(Refer to FAAO 7110.65, Para 3−1−5,VEHICLES/EQUIPMENT/PERSONNEL ONRUNWAYS.)OBSTRUCTION− Any object/obstacle exceedingthe obstruction standards specified by 14 CFRPart 77, Subpart C.OBSTRUCTION LIGHT− A light or one of a groupof lights, usually red or white, frequently mounted ona surface structure or natural terrain to warn pilots ofthe presence of an obstruction.OCEANIC AIRSPACE− Airspace over the oceans ofthe world, considered international airspace, whereoceanic separation and procedures per the InternationalCivil Aviation Organization are applied.Responsibility for the provisions of air traffic controlPCG O−1