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. • : :: ] <br /> • <br /> i . <br /> i <br /> [ 043 <br /> 11 <br /> 1/30/81 AC 150/5300-4B CHG 5 - - <br /> .R- <br /> : <br /> * i. Hazard to Air Navigation. An obstruction to air navigation that <br /> either has not been the subject of an FAA aeronautical study or has <br /> been determined to be a hazard to air navigation as a result of an <br /> FAA aeronautical study. (See paragraph 16 for further discussion.) <br /> j. Nonnkecision Instrument Runway. A runway having an existing <br /> instrument approach procedure utilizing air navigation facilities <br /> withionly horizontal guidance, or area-type navigation equipment, <br /> for which a straight-in nonprecision instrument approach procedure <br /> has been approved, or planned, and for which no precision approach <br /> facilities are planned, or indicated on an FAA approved airport lay- <br /> out <br /> Plan; a Department of Defense (DOD) approved airport layoht plan; <br /> o ! <br /> ther FAA planning documents; or DOD airport planning documents. -. <br /> . , <br /> k. Obstcle. Any fixed or mobile object that is located on an area <br /> intended for the surface movement of aircraft, that extends above a <br /> defined surface intended to protect aircraft in flight, that inter- <br /> , <br /> fereS with the siting or operation of navigation aids, or that may <br /> ■ <br /> control the establishment of instrument procedures. <br /> „ . • . _ <br /> , . <br /> 1. Obstacle Free Zone (OVZ). An area; <br /> . . <br /> (1) Comprised of: <br /> • . ”. :. <br /> ., <br /> (a) Runway OFZ. The runway OFZ is the volume of space above a <br /> • <br /> i <br /> surface longitudinally centered on the runway. The eleVa- <br /> tion of any point on the surface is the same as the eleva- <br /> tion of the nearest point on the runway centerline. The <br /> runway OFZ extends 200 feet (60 m) beyond each end of the <br /> runway and its width is: <br /> 1 For nonprecision instrument and visual utility runways <br /> . . <br /> ."- <br /> expected to accommodate only aircraft of 12,500 pounds <br /> (5 700 kg) or less, maximum certificated takeoff <br /> .. <br /> weight, 250 feet (75 m). <br /> 2 . .. <br /> I . For precision instrument runways expected to accom- <br /> modate only aircraft of 12,500 pounds (5 700 kg) or ' <br /> less, maximum certificated takeoff weight, 300 feet <br /> (90 m) . (See figure 5-1.) <br /> ...5■ <br /> -.. <br /> 44 <br /> 3 For runways expected to accommodate aircraft of more <br /> ''- <br /> 1 <br /> than 12,500 pounds (5 700 kg), maximum certificated <br /> takeoff weight, 400 feet (120 m). (See figure 5-1.) <br /> . - <br /> * <br /> !,11 <br /> 11 <br /> -.--, <br /> A2 <br /> Chap 1 <br /> Par 3 1.!.7 <br />