IL.II.L.K8
KnowledgeVisual illusions at night.
From the FAA library
- Chapter 17: Aeromedical Factors › Vision in Flight › Autokinesis
performed automatically. Figure 17-21. Geometric perspective. Night Vision Illusions There are many different types of visual illusions that commonly occur at night. Anticipating and maintaining awareness of them is usually the best way to avoid them. Autokinesis Autokinesis ... seconds. To prevent this illusion, focus the eyes on objects at varying distances and avoid fixating on one source of light. This illusion can be eliminated or reduced by visual scanning, by increasing the number of lights, or by varying…
- Chapter 3: Human Factors › Coping with Spatial Disorientation
night-flight currency and proficiency. Include cross-country and local operations at various airfields. 5. Ensure that when outside visual references are used, they are reliable, fixed points on the Earth’s surface. 6. Avoid sudden head movement, particularly during ... physically tuned for flight into reduced visibility. Ensure proper rest, adequate diet, and, if flying at night, allow for night adaptation. Remember that illness, medication, alcohol, fatigue, sleep loss, and mild hypoxia are likely to increase susceptibility to spatial disorientation…
- Chapter 17: Aeromedical Factors › Flicker Vertigo › Night Landing Illusions
Night Landing Illusions Landing illusions occur in many forms. Above featureless terrain at night, there is a natural tendency to fly a lowerthan-normal approach. Elements that cause any type of visual obscurities, such as rain, haze, or a dark ... Bright runway or approach lighting systems can create the illusion that the aircraft is closer to the runway, especially where few lights illuminate the surrounding terrain. Prior to flying at night, it is best to learn and know the challenges…
- Chapter 17: Aeromedical Factors › Diving or Rolling Beyond the Vertical Plane › Coping with Spatial Disorientation
Understand the causes of these illusions and remain constantly alert for them. Take the opportunity to experience spatial disorientation illusions in a device, such as a Barany chair, a Vertigon, or a Virtual Reality Spatial Disorientation Demonstrator. 2. Always obtain ... flight instruments. If intending to fly at night, maintain night-flight currency and proficiency. Include cross-country and local operations at various airfields. 5. Ensure that when outside visual references are used, they are reliable, fixed points on the Earth…
- Chapter 17: Aeromedical Factors › Treatment of Hypoxia › Spatial Disorientation and Illusions
horizon is lost, the vestibular system becomes unreliable. Without visual references outside the aircraft, there are many situations in which combinations of normal motions and forces create convincing illusions that are difficult to overcome. Prevention is usually the best remedy ... pilot has many hours of training in instrument flight, flight should be avoided in reduced visibility or at night when the horizon is not visible. A pilot can reduce susceptibility to disorienting illusions through training and awareness and learning…
- Chapter 17: Aeromedical Factors › Ground Lighting Illusions › How To Prevent Landing Errors Due to Optical Illusions
prevent these illusions and their potentially hazardous consequences, pilots can: 1. Anticipate the possibility of visual illusions during approaches to unfamiliar airports, particularly at night or in adverse weather conditions. Consult airport diagrams and the Chart Supplement U.S. (formerly Airport/Facility ... runway slope, terrain, and lighting. Figure 17-7. Runway illusions. 2. Make frequent reference to the altimeter, especially during all approaches, day and night. 3. If possible, conduct an aerial visual inspection of unfamiliar airports before landing. 4. Use Visual…