Final answer:
The question deals with the importance of vortex avoidance for pilots during landing after a large plane has taken off from a crossing runway. Pilots should continue the landing if the vortex is past the intersection, landing before the intersection to maintain safety.
Step-by-step explanation:
The subject is related to vortex avoidance during aircraft landing procedures. When a large aeroplane has departed from a crossing runway, pilots need to be aware of the potential for wake turbulence, which is caused by vortices generated by the plane's wings. If the wake turbulence is past the intersection, pilots should continue the approach and aim to land before the intersection to avoid encountering the vortices. The importance of considering wind speed and direction, as well as the plane's speed relative to the air mass, is crucial. Pilots must calculate the correct approach angle to maintain a velocity parallel to the runway despite crosswinds. Additionally, they must calculate the ground speed and be prepared to perform last-minute maneuvers to ensure the wheels are aligned correctly for a safe landing.