In standard aviation flight planning under ICAO guidelines, which of the following groups correctly identifies four standard components used to calculate operational fuel requirements for an IFR flight?

### Why this is right The material defines the total as planned-route trip fuel, a contingency equal to 5 percent of trip fuel, alternate fuel, and final reserve fuel. These are separate categories that are added to obtain the stated requirement. ### The concept Trip fuel covers the planned route. Contingency fuel is an additional allowance calculated from trip fuel. Alternate fuel is allocated for the alternate, while final reserve is a minimum intended to remain on landing. Keeping the categories separate prevents a reserve from being mistakenly treated as planned trip fuel. ### The other options - **Taxi fuel, climb fuel, descent fuel, holding fuel**: These are not the four categories specified in the material. - **Trip fuel, wind allowance, deviation fuel, final reserve fuel**: Wind may affect trip calculations, but this is not the stated four-part structure. - **Alternate fuel, reserve fuel, runway fuel, contingency fuel**: This omits trip fuel and does not identify the final reserve as a distinct component. ### Terms - **Trip fuel**: Fuel allocated for the planned route. - **Contingency fuel**: The additional allowance specified here as a percentage of trip fuel. - **Alternate fuel**: Fuel allocated for the alternate plan. - **Final reserve**: The minimum fuel amount intended to remain on landing. ### Remember Add the four named categories, keeping final reserve separate from en-route fuel.