What is the significance of following the "15-minute" rule during flights?

The "15-minute" rule is primarily significant for maintaining awareness of fuel status during flights. This rule encourages pilots to regularly monitor and assess their fuel levels and consumption rate, ensuring that they do not become critically low on fuel, potentially leading to unsafe situations. It requires pilots to plan for contingencies and allows them to make more informed decisions regarding diversion or landing options if fuel levels become a concern.

By adhering to this rule, pilots enhance flight safety and operational efficiency, as it provides a buffer period to handle unexpected situations, such as unfavorable weather or equipment malfunctions that could impact fuel usage. This proactive approach helps ensure that fuel management is an integral part of flight planning and execution.