An aircraft obliged to give way to another must avoid what?

The correct response indicates that an aircraft obliged to give way must avoid crossing ahead of the other aircraft. This is based on the principles of right-of-way rules established in aviation regulations.

When an aircraft is required to yield, crossing ahead can pose a significant risk of collision, as the yielding aircraft may disrupt the flight path of the other aircraft that has the right of way. By avoiding crossing ahead, the yielding aircraft effectively maintains a safe distance and preserves the oncoming aircraft's route.

In terms of flying above or directly underneath the other aircraft, these maneuvers can also be safe under certain circumstances, but the more immediate risk lies in crossing ahead, where a conflict of paths can occur. Thus, the emphasis on avoiding crossing ahead aligns with the fundamental safety protocols in aviation to minimize the risk of mid-air collisions.