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Flashcards in Human Factors Deck (66)
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What causes 91% of fatal aviation accident?

Pilot error


What is situational awareness in aviation?

Pilots must have a good understanding of what is going on around them


At what stage of flight do most accidents occur?



What are the four stages of pilot performance?

Information gathering, information processing, decision making, implementing decisions


What are four factors that affect situational awareness?

Fatigue, sickness, distraction, stress


What are the four divisions of situational awareness?

The pilot, aircraft, environment, operation


What is the pilot decision making model?


What are the factors that influence decision making?

Knowledge, situational awareness, skill, experience and training, reasoning, risk assessment, stress, attitude


How does skill influence decision making?

The higher the skill level, the less effort required to fly the aircraft


How does experience and training influence decision making?

Greatly improved skills of experienced pilots allow them to pay more attention to what is going on around them. If something goes wrong, experience can street you in the right direction


What is the false assumption?

Assuming everything is normal when it is not


When can false assumptions occur?

You see or hear what you expect

Fixation (you focus your attention on one item while something more important goes unnoticed)

Tendency to relax and make false assumptions after periods of high concentration

Flying in a new unfamiliar aircraft

Ignoring bad news


Describe the relationship between behavioural efficiency and level of arousal


What are some causes of stress?

Physical (extreme temperature, noise & vibration, lack of oxygen)

Physiological (fatigue, hunger, injury, illness)

Psychological (homesickness, business/academic worries, illness of loved one)


Describe the relationship between pilot capacity, time, and margin of safety


How can life stress be managed?

Physical fitness, social support, recreation, special techniques, self assessment, good habits and itme management


What is the "IMSAFE" checklist?

Illness - do I have any symptoms?

Medication - have I been taking them?

Stress - am I under psychological pressure?

Alcohol - Have I been drinking within 12 hours?

Fatigue - Am I adequately rested?

Eating - when was my last meal?


What are 5 types of hazardous attitudes and their antidotes?

Anti-Authority: "Follow the rules, they are usually right"

Impulsivity: "Think before you act"

 Invulnerability: "It can happen to anyone anytime"

Macho: "It's not worth the risk"

Resignation: "I'm not helpless. I can make a difference"


What is hypoxia? What does it interfere with?

A lack of sufficient oxygen for the body to operate normally. Its onset may be accompanied by a feeling of euphoria.

It interferes with reasoning, alertness, and consciousness


Explain the different types of hypoxia

Hypoxic hypoxia: occurs with exposure to altitude

Anemic hypoxia: decreased red blood cell count

Stagnant hypoxia: inadequate blood flow to body tissues. Can occur when exposed to higher G forces

Histotoxic hypoxia: inability of cells to use oxygen available. Can be caused by high blood alcohol levels


Describe the three types of vision

Photopic - during daytime or high artificial illumination conditions the eyes rely on central vision to perceive and interpret image and colour object

Mesopic vision - occurs at dawn, dusk, or full moonlight levels and is characterized by decreasing visual acuity and colour vision

Scotopic vision - occur during nighttime, low visibility, and low intensity artificial illumination conditions. Central vision becomes ineffective to maintain visual aacuity and colour perception


What affects the visibility of an object?

Size, ambient illumination, contrast, viewing time, atmospheric clarity


What are the dangers of excessive ambient illumination, especially from light reflected off the canopy, surfaces, cloud, water, snow, and desert terrain?

It can produce glare that may cause uncomfortable squinting, eye tearing, and temporary eye blindness


What factors can affect pilot vision?

Uncorrected refractive eye disorder (like myopia)

Self imposed stress (self medication, alcohol consumption, tobacco, hypoglycemia, sleep depreivation)


How much time do the eyes require to fully adapt to the dark?

30 to 45 minutes


How can you minimize the time neccessary to achieve complete dark adaptation?

Avoid inhaling carbon monoxide, get enough vitamin A, adjust instrument and cockpit lighting to lowest level, avoid prolonged exposure to bright light, use supplementary oxygen when flying at night above 5000'


What are the best ways to protect your eyes?

Wear 100% UVA/UVB sunglasses

Avoid polarized sunglasses

Don't wear prescription sunglasses at night


Define steady and impulse/blast noise?

Steady: continuous noise of sudden or gradual onset and long duration

Impulse/blast: noise pulses of sudden onset and brief duration


What are physiological effects of noise exposure to pilots?

Ear discomfort, ear pain, ear drum rupture, temporary hearing impairment, permanent hearing impairment


How can a pilot protect their ears?

Limit duration of exposure to noise, use ear protection equipment, use active noise reduction headset