Order 7110.65P, Air Traffic Control, with changes

8/5/04Pilot/Controller GlossaryHHAA−(See HEIGHT ABOVE AIRPORT.)HAL−(See HEIGHT ABOVE LANDING.)HANDOFF− An action taken to transfer the radaridentification of an aircraft from one controller toanother if the aircraft will enter the receivingcontroller’s airspace and radio communications withthe aircraft will be transferred.HAR−(See HIGH ALTITUDE REDESIGN.)HAT−(See HEIGHT ABOVE TOUCHDOWN.)HAVE NUMBERS− Used by pilots to inform ATCthat they have received runway, wind, and altimeterinformation only.HAZARDOUS INFLIGHT WEATHER ADVISO-RY SERVICE− Continuous recorded hazardousinflight weather forecasts broadcasted to airbornepilots over selected VOR outlets defined as anHIWAS BROADCAST AREA.HAZARDOUS WEATHER INFORMATION−Summary of significant meteorological information(SIGMET/WS), convective significant meteorologicalinformation (convective SIGMET/WST), urgentpilot weather reports (urgent PIREP/UUA), centerweather advisories (CWA), airmen’s meteorologicalinformation (AIRMET/WA) and any other weathersuch as isolated thunderstorms that are rapidlydeveloping and increasing in intensity, or lowceilings and visibilities that are becoming widespreadwhich is considered significant and are notincluded in a current hazardous weather advisory.HEAVY (AIRCRAFT)−(See AIRCRAFT CLASSES.)HEIGHT ABOVE AIRPORT− The height of theMinimum Descent Altitude above the publishedairport elevation. This is published in conjunctionwith circling minimums.(See MINIMUM DESCENT ALTITUDE.)HEIGHT ABOVE LANDING− The height above adesignated helicopter landing area used for helicopterinstrument approach procedures.(Refer to 14 CFR Part 97.)HEIGHT ABOVE TOUCHDOWN− The height ofthe Decision Height or Minimum Descent Altitudeabove the highest runway elevation in the touchdownzone (first 3,000 feet of the runway). HAT ispublished on instrument approach charts in conjunctionwith all straight-in minimums.(See DECISION HEIGHT.)(See MINIMUM DESCENT ALTITUDE.)HELICOPTER− Rotorcraft that, for its horizontalmotion, depends principally on its engine-drivenrotors.(See ICAO term HELICOPTER.)HELICOPTER [ICAO]− A heavier-than-air aircraftsupported in flight chiefly by the reactions of the airon one or more power-driven rotors on substantiallyvertical axes.HELIPAD− A small, designated area, usually with aprepared surface, on a heliport, airport, landing/takeoffarea, apron/ramp, or movement area used fortakeoff, landing, or parking of helicopters.HELIPORT− An area of land, water, or structure usedor intended to be used for the landing and takeoff ofhelicopters and includes its buildings and facilities ifany.HELIPORT REFERENCE POINT (HRP)− Thegeographic center of a heliport.HERTZ− The standard radio equivalent of frequencyin cycles per second of an electromagnetic wave.Kilohertz (KHz) is a frequency of one thousandcycles per second. Megahertz (MHz) is a frequencyof one million cycles per second.HF−(See HIGH FREQUENCY.)HF COMMUNICATIONS−(See HIGH FREQUENCY COMMUNICATIONS.)HIGH ALTITUDE REDESIGN (HAR)− A level ofnon−restrictive routing (NRR) service for aircraftthat have all waypoints associated with the HARprogram in their flight management systems orRNAV equipage.PCG H−1