What safety practice should a pilot implement concerning fuel?

Monitoring fuel levels throughout a flight is crucial for ensuring safety and preventing potential fuel exhaustion. By continuously checking fuel levels, a pilot can make informed decisions about fuel management and gauge whether they have enough fuel to complete the flight or if adjustments need to be made, such as diverting to another airport or adjusting the flight plan. This practice helps avoid situations where the fuel may diminish more quickly than anticipated due to factors such as increased fuel consumption during unexpected weather conditions or changes in flight route.

In contrast, checking fuel levels only before long flights could lead to dangerous situations if fuel levels are lower than expected during the flight. Using fuel grades interchangeably can also introduce risks, as different grades may have different combustion characteristics and could adversely affect engine performance or reliability. Additionally, not conducting fuel checks during flight can lead to critical situations where a pilot is unaware of diminishing fuel levels, increasing the risk of engine failure or other emergencies. Therefore, continuous monitoring is the safest approach to maintain situational awareness and ensure a successful flight.