What is the visual wing reference for 2/3 wingtip distance?

The visual wing reference for 2/3 wingtip distance is effectively depicted by the fuel cap. During flight, particularly in maneuvering and performance assessments, pilots utilize various visual references to maintain orientation and control. The fuel cap serves as an essential guide because, from the pilot's cockpit viewpoint, it aligns visually at approximately two-thirds of the distance from the wingtip to the aircraft's body. This reference helps pilots gauge their spatial awareness and maintain a proper flight path.

Other options, while they may seem relevant, do not provide the same visual reference. The wingtip light, for example, can be a point of focus; however, it does not provide the same clear visual indicator necessary for maintaining a specific distance reference in relation to the wings. The horizontal stabilizer is also used for reference, but it serves a different purpose and does not align in the way necessary for a 2/3 wingtip visual reference. The center of gravity pertains to the aircraft's balance rather than a visual reference point during flight maneuvers. Understanding the visual references is fundamental to effective flight training and safety.