IRFP-01
Metro Review
XI.
Spatial Disorientation 9.7.1.1.5.2
Spatial disorientation is the mistaken perception of one's position
relative to the earth. Three sensory systems give us the information
we use to maintain our equilibrium and determine where we are and
how we are oriented.
A. Sensory Systems
1.
Visual System
a.
90% of the information we use for point
reference comes from our eyes
b.
When we fly in visual meteorological conditions
(VMC), our vision enables us to keep the
aircraft properly oriented to Earth by reference
to the ground, sky, and horizon
c.
It is the most reliable of our senses but is prone
to illusion, mistakes in processing or
interpreting what we see, that can result in
spatial disorientation
2.
Vestibular System
Fig 45: Vestibular
Semicircular Canals
System
Ossicles
Vestibular Nerve
Pinna
Cochlear Nerve
Cochlea
Eardrum
Vestibule
Oval Window
Auditory Canal
Round Window
Eustachian Tube
Figure 45: VESTIBULAR SYSTEM
(8-97) Change 2
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