What is the purpose of using the Opening and Closing Angles method?

The purpose of using the Opening and Closing Angles method is to determine drift off track. This technique is particularly useful in navigation, especially when a pilot needs to correct their course to stay on the intended path. By comparing the angle between the aircraft's heading and the desired track, pilots can assess how much they have deviated from their course. If the angles are widening, it indicates that the aircraft is drifting away from the desired track; conversely, if the angles are closing, it shows that the aircraft is returning towards the intended route.

By accurately assessing drift using this method, pilots can make necessary adjustments to their flight path, enhancing navigational precision. This is vital for maintaining situational awareness and ensuring safe and efficient flight operations.