limited to daytime using the rod cells.

almost equally shared by the entire retina.

 limited to the foveal area of the retina.

governed by peripheral vision over an area of approximately 20 degrees of angle.

responsible for night vision.

concentrated at the peripheral visual field.

insensitive to oxygen deficiency.

concentrated mainly in the fovea.

Hypotension.

A too high diastolic pressure.

Hypertension.

An ideal systolic pressure.

N0T rely on the his/her "seat-of-the-pants", unless he/she has completed a spatial disorientation training.

Ignore his/her "seat-of-the-pants" sense as it is completely unreliable.

Rely on the his/her "seat-of-the-pants" sense as visual contact is lost.

Presbycusis.

A cerumen blockage in the ear canal.

Damage to the auditory nerve.

Significant wear on the cochlear hair cells.

35 000 ft

30 000 ft

25 000 ft

43 000 ft

Platelets.

Blood plasma.

Red blood cells.

White blood cells.

The pilot may believe that they are flying too fast, resulting in an early thrust reduction and lack of energy. They should be careful not to reduce below the specified approach speed.

The pilot may have the impression that they are above the correct approach path, resulting in an increased rate of descent and possible undershoot. They should believe their instruments.

The pilot will feel that they are further out on the descent path and may reduce thrust too late, resulting in an overshoot. They should pay careful attention to their approach speed.

The pilot will be able to correctly assess their relative position and speed, but may be unaware of the increased landing distance required. They should consult their performance charts before the flight to ensure that the aircraft can safely land at the aerodrome.