Where are wing-tip vortices primarily located?

Wing-tip vortices are primarily located at the wing tips. When an aircraft generates lift, the pressure difference between the upper and lower surfaces of the wings causes air to flow around the wingtips from the high-pressure area under the wing to the low-pressure area above the wing. This flow leads to the formation of rotating columns of air, known as vortices, which trail off from the wingtips.

These vortices are particularly significant because they can create hazards for other aircraft, especially smaller ones flying in the vicinity of larger aircraft. Understanding their location is crucial for maintaining safe separations during takeoff and landing.

The other options do not accurately describe the location of wing-tip vortices as they do not occur above the wings, below the fuselage, or behind the tail section. Each of those areas plays a different role in the aerodynamics of the aircraft but is not where the vortices originate.