1, 2 and 3.

3 only.

1 and 3.

1,3 and 4.

40-65 mg/day

150 mg/day.

3 mg/day.

250 mg/day

The otolith organs sense motion around the roll, pitch and yaw axes, whereas the semicircular canals detect

linear acceleration and gravity

The otolith organs detect angular acceleration, whereas the semicircular canals detect linear acceleration but

not gravity

The semicircular canals sense motion around the roll, pitch and yaw axes, whereas the otolith organs detect

angular acceleration and gravity.

The semicircular canals detect angular acceleration, whereas the otolith organs detect linear acceleration

and gravity.

Potassium Hydroxide

Mercury

Carbon Monoxide

Foam Fire Extinguisher

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.

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.

By wearing their corrective lenses.

By scanning the sky for other aircraft.

By maintaining a constant instrument scan and trusting the indications.

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

ozone at altitude.

Balack of distant focal points.

atmospheric perspective.

flying over mountainous terrain.

Angular acceleration

Linear acceleration

A lack of acceleration

Vertical acceleration

1 and 4.

1 and 5

2 and 3.

2 and 4.

 lack of mobility of the cornea.

 clouding of the lens.

mis-shapen cornea.

lack of accommodation at the cornea.