Terms and Definitions

Aircraft

Any machine that can derive support in the atmosphere from the reactions of the air other than the reactions of the air against the earth's surface;

Aircraft departures

The number of take-offs of aircraft. For statistical uses, departures are equal to the number of landings made or flight stages flown;

Aircraft kilometers performed

Aircraft kilometers equal the sum of the products obtained by multiplying the number of flights performed on each flight stage by the stage distance;

Aircraft movement

An aircraft take-off or landing at an airport. For airport traffic purposes one arrival and one departure is counted as two movements;

Aircraft - type of

All aircraft of the same basic design including all modifications thereto except those modifications which result in a change in handling or flight characteristics;

Commercial air carrier

A carrier performing scheduled or non-scheduled air transport services, or both, available to the public for the carriage of passengers, mail or cargo for remuneration;

Distance flown per passenger

The average distance flown per passenger is computed by dividing the passenger-kilometers by the related number of passengers carried.

Disembarkation

The leaving of an aircraft after a landing, except by crew or passengers counting on the next stage of the same through-flight;

Domestic Flight

A flight having exclusively domestic stages. See domestic flight stage;

Domestic flight stage

Domestic flight stages include all flight stages flown between points within the domestic boundaries of a State by an airline registered in that State;

Domestic Scheduled airline

An airline which operates any scheduled service wihin the boundaries of the State where the airline is registered but which does not operate scheduled international services;

Embarkation

The boarding of an aircraft for the purpose of commencing a flight, except by such crew or passengers as have embarked on a previous stage of the same through-flight;

Flight commercial air transport

The operation of aircraft on one or more stages on a scheduled or non-scheduled basis, which is available to the public for remuneration and for hire;

Flight stage

The operation of an aircraft from take-off to its next landing;

Freight (or mail) tonne-Kilometres (performed)

A metric tonne of freight or mail carried one kilometre. Freight tonne-kilometres equal the sum of the products obtained by multiplying the number of tonnes of freight, express, diplomatic bages carried on each flight stage by the stage distance. Cargo and freight purposes freight includes express and diplomatic bags but not passengers baggage. Mail tonne-kilometres are computed in the same way as freight tonne-kilometres;

Freight (or mail) tonnes carried (performed)

The number of tonnes of freight carried is obtained by counting each tonne of freight on a particular flight (with one flight number) once only and not repeatedly on each individual stage of that flight. The only exception to this is for freight flown on both the international and domestic stages of the same flight, which is considered in computation both as a domestic and an international shipment or dispatch. The same principle should be used in calculating mail tonnes carried;

International airport

Any airport designated by the Government of India an airport of entry and departure for foreign airline for embarkation and disembarkation of scheduled international air traffic, where the formalities incident to customs, immigration, public, health, agricultural quarantine and similar procedures are carried out;

International Flight

A flight that contains one or more international flight stages;

International flight stage

A flight stage with one or both terminals in that territory of a State, other than the State in which the airline is registered. Technical stops are not considered in classifying flight stage;

International non-scheduled operator

An operator offering international service to the public on a non-scheduled basis only. Such an operator may also offer domestic services on a non-scheduled basis only;

International scheduled airline

An airline which operates any scheduled international air transport service regardless of the proportion of international service offered as compared with all other kinds of services offered;

International traffic (of airports)

For airport traffic purposes, international traffic means: a) passengers, Freight and mail disembarked at an airport located in a country other than of the airport of embarkation, or vice versa; and b) movements on flight of national or foreign aircraft whose origin or destination is located in the territory of a State other than that in which the airport under consideration is located;

Mail

Dispatches of correspondence and other objects tendered by and intended for delivery to postal administration;

Non-scheduled air transport operator

For statistical purposes an operator is non-scheduled air transport operator if it offers air transport service to the public on a non-scheduled basis only;

Operating expenses per traffic-unit

This is a type of financial measurement which relates the traffic or capacity applicable to the operating expenses. It is computed by dividing the operating expenses by the tonne-kilometres performed or by the tonne-kilometres available.

Operating revenue per traffic-unit

This is a type of financial measurement which relates the traffic or capacity applicable to the operating revenues. It is computed by dividing the operating revenues by the tonne-kilometres performed or by the tonne-kilometres available.

Operator

A person, organization or enterprise engaged in or offering to engage in an aircraft operations.

Passengers Kilometres performed

A passengers kilometre is performed when a passenger is carried one kilometre. Calculation of passenger-kilometres equals the sum of the products obtained by multiplying the number of revenue passengers carried on each flight stage by the stage distance. The resultant figure is equal to the number of kilometres travelled by all passengers;

Passenger load factor

Passenger-kilometres performed expressed as a percentage of seat-kilometres available;

Passengers carried

The number of passengers carried is obtained by counting each passenger on particular flight (with one flight number) once only and not repeatedly on each individual stage of that flight, with a single exception that a passenger flying on both the international and domestic stages of the same flight should be counted as both a domestic and international passenger;

Passengers carried per aircraft

The average number of passengers carried per aircraft is computed by dividing passenger-kilometres by the related aircraft kilometers flown.

Passenger revenue per traffic-unit

This is a type of financial measurement which relates the passenger traffic applicable to the passenger revenues. It is computed by dividing the passenger revenues by the passenger-kilometres performed/ available.

Passenger weight

For converting aircraft passenger load into weight load, the number of passengers is multiplied usually by 90 kilogrammes which allows for the weight of the passenger plus both free and excess baggage. However, in reporting, the conversion is left to the discretion of the operator and conversion factors other than 90 kilogrammes may be used;

Revenue passenger

Refers to passengers paying 25% or more of the normal applicable fare;

Scheduled airline/air carrier

An air transport enterprise offering any scheduled air service;

Scheduled services

Services provided by flights scheduled and performed for remuneration according to a published timetable, or so regular or frequent as to constitute a recognizably systematic series, which are open to use by members of the public; extra revenue flights occasioned by overflow traffic from scheduled flight; and preliminary revenue flights on planned new air services:

Seat Kilometres available

A seat-kilometre is available when a seat is flown one kilometre. Seat Kilometres available are equal to the sum of the products obtained by multiplying the number of passenger seats available for sale on each flight stage by the stage distance. Seats not actually available for the carriage of passengers because of the weight of fuel or other load should be excluded in the calculations;

Speed flown per aircraft

This is an average per aircraft measure computed by dividing the aircraft kilometres flown by the related aircraft hours.

Stage distance flown per aircraft

The average distance flown per aircraft is computed by dividing the aircraft kilometres flown by the related number of aircraft departures.

Tonne

The mass equal to 1000 kilograms

Tonne-kilometres available

A metric tonne of available payload space flown one kilometre. Tonne-kilometres available equals the sum of the products obtained by multiplying the number of tonnes available for the carriage of revenue load (passengers, freight and mail) on each flight stage by the stage distance;

Tonne-kilometres performed

A metric tonne of revenue load carried one kilometre. Tonne-kilometres performed equals the sum of the product obtained by multiplying the number of tonnes of revenue load carried on each flight stage by the stage distance;

Traffic

For air transport purposes, traffic means the carriage of passengers, freight and mail;

Weight load factor

Tonne-kilometres performed expressed as a percentage of tonne-kilometres available;

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