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Load terms:
| Basic Empty Mass: | The mass of an aircraft plus standard items such as: unusable fuel, full operating fluids, fire extinguishers, emergency oxygen equipment. |
| Dry Operating Mass: | The total mass of an aircraft ready for a specific type of operation excluding all usable fuel and traffic load. This mass includes items such as: crew and crew baggage, catering and removable passenger service equipment, special operational equipment. |
| Landing Mass: | The mass of the aircraft at landing. |
| Operating Mass: | The Dry Operating Mass plus fuel but without traffic load. |
| Ramp Mass: | The mass of the aircraft at the commencement of taxi. |
| Take-Off Mass: | The mass of the aircraft including everything and everyone contained within it at the commencement of take-off. |
| Traffic Load: | The total mass of passengers, baggage and cargo, including any non-revenue load. |
| Useful load: | The traffic load plus take-off fuel. |
| Zero Fuel Mass: | The Dry Operating Mass plus traffic load but excluding fuel. |
Fuel terms:
| Additional Fuel: | It is fuel which is added to comply with a specific regulatory or company requirement. |
| Alternate Fuel: | It is the amount of fuel required from the missed approach point at the destination aerodrome until landing at the alternate aerodrome. |
| Block Fuel: | It is the total fuel required for the flight. |
| Contingency Fuel: | It is carried to account for additional enroute fuel consumption caused by unforeseen factors such as wind, routing changes or ATM restrictions. In general terms, the minimum contingency fuel is the greater of 5% of the trip fuel or 5 minutes holding consumption at 1500 ft above destination airfield elevation. |
| Extra Fuel: | It is fuel added at the discretion of the Commander. |
| Final Reserve Fuel: | Final reserve fuel is the minimum fuel required to fly for 45 minutes at 1500 ft above the alternate aerodrome or, if an alternate is not required, at the destination aerodrome at holding speed in ISA conditions. If the flight is planned without alternate, the final reserve fuel should be no less than 60 minutes holding fuel. |
| Reserve Fuel: | It is the sum of alternate fuel plus final reserve fuel plus contingency fuel plus additional fuel. |
| Take-Off Fuel: | The total amount of usable fuel at take-off. |
| Taxi Fuel: | The fuel used prior to take-off and must include pre-start APU consumption, engine start and taxi fuel. |
| Trip Fuel: | It is the required fuel quantity from brake release on take-off at the departure aerodrome to the landing touchdown at the destination aerodrome. |
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