Why is monitoring fuel levels crucial before and during a flight?

Monitoring fuel levels before and during a flight is crucial primarily to ensure that there is enough fuel for the intended flight path. This is vital for the safe operation of the aircraft, as insufficient fuel can lead to an emergency landing or forced landing situations, which pose significant risks to both the pilot and any passengers on board.

Fuel calculations typically take into account the distance to be flown, expected weather conditions, and reserve fuel requirements for holding patterns or diverting to an alternate airport if necessary. Making sure fuel levels are adequately monitored helps pilots account for these variables and plan for unexpected circumstances that may arise during the flight.

While other factors such as avoiding unnecessary weight, checking fuel quality, and complying with safety regulations are important considerations in aviation, the primary concern directly related to fuel levels is ensuring there is enough fuel to complete the intended flight safely.