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

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

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

Hypotension.

Hypertension.

An ideal systolic pressure.

A too high diastolic pressure.

concentrated mainly in the fovea.

insensitive to oxygen deficiency.

responsible for night vision.

concentrated at the peripheral visual field.

Vertical acceleration

Angular acceleration

Linear acceleration

A lack of acceleration

By maintaining a constant instrument scan and trusting the indications.

By wearing their corrective lenses.

By deliberately focusing on a distant object such as a cloud edge or a wingtip.

By scanning the sky for other aircraft.

Potassium Hydroxide

Mercury

Carbon Monoxide

Foam Fire Extinguisher

250 mg/day

3 mg/day.

40-65 mg/day

150 mg/day.

Drugs to improve sleep may be used during flight, if approved by the commander.

The use of drugs containing melatonin within 12 hours of, or during, flight duty, is prohibited.

Sleep-improving drugs can be taken during flight duty, but only just before a short in-flight rest period.

Sleep-inducing drugs may be taken up to 4 hours before flight, without needing to consult an Aeromedical Examiner.

Balack of distant focal points.

atmospheric perspective.

flying over mountainous terrain.

ozone at altitude.

1 and 5

2 and 3.

1 and 4.

2 and 4.