When navigating, what is the function of the checkpoints 2-5 minutes ahead?

The function of the checkpoints located 2-5 minutes ahead during navigation is primarily to confirm the flight path. These checkpoints serve as reference points that pilots can use to verify that their current route and altitude align with the intended navigation plan. By monitoring these points, pilots can ensure that they are on course and maintain situational awareness, especially in complex environments where deviations from the planned route can occur due to changing conditions or obstructions.

While calculating distance and managing fuel consumption are important aspects of flight planning and navigation, the specific role of these checkpoints is more aligned with confirming the flight path, allowing pilots to make necessary adjustments if they find themselves veering off course. Assessing traffic, while crucial, is generally done through other means such as radar or visual observation rather than through fixed checkpoints designed for path confirmation.