Available seat kilometres (ASKs)

The number of seats made available for sale multiplied by the distance flown.

Available tonne kilometres (ATKs)

The number of tonnes of capacity available for the carriage of revenue load (passengers and cargo) multiplied by the distance flown.

Average stage length

Sum of distance of each scheduled sector flown divided by number of scheduled sectors.

Bilateral

Air Services agreement between two governments.

Freight tonne kilometres (FTKs)

The number of revenue tonnes of freight multiplied by the distance flown.

Overall revenue load factor

RTKs as a % of ASKs.

Passenger load factor

RPKs as a % of ASKs.

Revenue passenger kilometres (RPKs)

The number of revenue passengers carried multiplied by the distance flown.

Revenue tonne kilometres (RTKs)

The revenue load (passengers and cargo) multiplied by the distance flown.

Seat Pitch

The distance between one seat and the same point on another seat directly in front or behind

Utilisation

Average hours flown per day.

Expenditure classifications

Labour

All salaries, wages and employee benefits

Fuel

Fuel and oil

Maintenance and Overhaul

Materials, services and overheads

Aircraft and Traffic Servicing

Airport dues, aircraft ground handling, line servicing and loading

Passenger Services

Passenger ground handling, meals, inflight services & cabin crew trip expenses

Sales & Marketing

Commissions, advertising, promotions and marketing

Other Expenses

Tech crew trip expenses, safety, training, accounting, insurance, employee relations, property rental, foreign exchange gains/losses

Aircraft Operating Lease

Aircraft operating lease rentals

Freedoms

First freedom

The privilege to fly across another state without landing.

Second freedom

The privilege to land in another state for non-traffic purposes (eg refuelling, mechanical requirements) but not for the purpose of uplifting passengers or discharging traffic.

Third freedom

The privilege to put down in another state revenue passengers, mail and freight taken on in the state of airline registration.

Fourth freedom

The privilege to take on in another state revenue passengers, mail and freight destined for the state of airline registration.

Fifth freedom

The privilege for an airline registered in one state and en route to or from that state to take on revenue passengers, mail and freight in a second state and to put them down in a third state.

Sixth freedom

The privilege for an airline registered in one state to take on revenue passengers, mail and freight in a second state, transport them via the state of registration, and put them down in a third state.

Seventh freedom

The privilege for an airline registered in one state to take on revenue passengers and freight to a second state and to put them down in a third state without the journey originating, stopping or terminating in the state of registration.