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Terms/Definitions

Hot Spots

Hot Spots are defined as the intersection of complex and confusing taxiways and runways in any combination. These areas have history or potential for runway incursions or surface incidents due to variety of causes not limited to airport marking, traffic flow, signage and airport lighting.

TACAN

TACAN stands for Tactical Air Navigation. It is used for military or naval operations. TACAN ground equipment consists of either fixed or mobile transmitting unit also TACAN does not operate through conventional VOR equipment. TACAN is pulse system and operates in Ultrahigh Frequency (UHF) band of frequencies. Also Read: Frequency Bands and Frequency Allocation for

Takeoff Funnel

Takeoff funnel represents the area surrounding the take off flight path, withing which all obstacles must be cleared, assuming they are all projected on the intended track.

Obstacle free zone (OFZ)

Obstacle free zone is the airspace above the inner approach surface, inner transitional surfaces, and balked landing surface and that portion of the strip bounded by these surfaces, which is not penetrated by any fixed obstacle other than a low-mass and frangible mounted one required for air navigation purposes.

Runway Incursion

Runway incursion is occurrence at an aerodrome involving the incorrect present of person, aircraft or vehicle  on the protected area of surface designated for the landing and takeoff of aircraft.

Preventive Maintenance

Preventive maintenance is programmed maintenance work done in order to prevent failure or degradation of facilities. Example: preventive maintenance of ALS preventive maintenance of navigation aids etc.

ABAS, GBAS and SBAS

Aircraft Based Augmentation System Ground Based Augmentation System Space Based Augmentation System ABAS GBAS SBAS It is an augmentation system that augments and/or integrates the information obtained from other GNSS elements with information available on board the aircraft. Example: RAIM – Receiver Autonomous Integrity Monitoring GBAS is primarily used for precision approach operations. It is

Phonetic Alphabets and Numbers

  A AL FAH K KEY LOH U YOU NEE FORM 4 FOW ER B BRAH VOH L LEE MAH V VIK TAH 5 FIFE C CHAR LEE M MIKE W WISS KEY 6 SIX D DELL TAH N NO VEM BER X ECKS RAY 7 SEV EN E ECK OH O OSS CAH Y

RNPC – Required Navigation Performance Capability

FANS – Future Air Navigation Systems defined RNPC (Required Navigation Performance Capability) as a parameter describing lateral deviations from assigned or selected track as well as along track position fixing accuracy on the basis of an appropriate containment level. In 1990 capability and performance were distinctly identified and RNPC was changed to RNP(Required Navigation Performance).

Radius to Fix (RF)

Radius to Fix (RF) leg is defined as constant radius circular path around a defined turn center that terminates at a fix. This leg may have speed limits applicable to prevent overshoot or undershoot of aircraft. RNP Scalability Part 4: PBN – RNP APCH, RNP AR APCH, RNP AR DP and A-RNP