What is the Somatogravic illusion?

Somatogravic illusion is the tendency – in the absence of visual references – to incorrectly perceive acceleration as an increase in pitch attitude, a perception that can lead pilots instinctively to make nose-down inputs even if the aircraft is flying level.

What are atmospheric illusions?

Atmospheric Illusions: Illusions concerning weather and the appearance it creates regarding terrain. Surface references or the natural horizon may at times become obscured by smoke, fog, smog, haze, dust, ice particles, or other phenomena, although visibility may be above Visual Flight Rule (VFR) minimums.

What are vestibular illusions?

Spatial disorientation In general, vestibular illusions occur under conditions in which a pilot is unable to see a clear horizontal reference. The risk is increased at night, in clouds or in bad weather. A number of vestibular-related spatial disorientation illusions have been well-described in the literature.

What is reversible perspective illusion?

Reversible Perspective Illusion. At night, an aircraft may appear to be moving away from a second aircraft when it is, in fact, approaching a second aircraft. This illusion often occurs when an aircraft is flying parallel to another’s course.

What causes Somatogravic illusion?

Somatogravic illusions occur during rapid acceleration and deceleration flight movements. Specifically, this illusion usually happens when there’s limited exterior visibility and a pilot reacts to body senses over actual flight path and instrument readings.

What is ambiguous illusion?

Ambiguous illusions are illusions that are meant to shift from one object to another as a person’s perception of them changes. A famous ambiguous illusion is the white-candlestick-two-black-silhouetted-faces illusion.

What is it called when you see two images in one?

Ambiguous images or reversible figures are visual forms which create ambiguity by exploiting graphical similarities and other properties of visual system interpretation between two or more distinct image forms. These are famous for inducing the phenomenon of multistable perception.

What is the term for spatial disorientation?

The flight crew might become spatially disorientated in relation to an aerodrome or runway when flying an approach. This is called loss of situational awareness.

What is cognitive illusion?

A cognitive illusion is a common thinking error or thinking trap. Cognitive illusions are endemic in the normal population, where they’re usually asymptomatic. It’s important to emphasize that we’re as prone to cognitive illusions as we are to optical illusions.

How is the somatogravic illusion an optical illusion?

somatogravic illusion An optical illusion that can result in spatial disorientation. A rapid acceleration during takeoff can create an illusion of being in a nose-up attitude. The disoriented pilot will push the aircraft into a nose-low, or dive, attitude.

What causes the Somatogyral illusions in SKYbrary aviation?

Changes in linear acceleration, angular acceleration and vertical acceleration (gravity) which occur as a result of flight control inputs, made to accomplish a change in the flight path, are detected by the vestibular system and may create either or both of these illusions.

What is the effect of an optical illusion?

An optical illusion that can result in spatial disorientation. A rapid acceleration during takeoff can create an illusion of being in a nose-up attitude. The disoriented pilot will push the aircraft into a nose-low, or dive, attitude. A rapid deceleration by quick reduction of the throttles can have the opposite effect,…

What causes an illusion of a nose up attitude?

A rapid acceleration during takeoff can create an illusion of being in a nose-up attitude. The disoriented pilot will push the aircraft into a nose-low, or dive, attitude.