Night flight

Question 1

Types of light-sensitive cells in the eyes

Answer 1

Cones and Rods

Question 2

cone cells in eyes:

Answer 2

-responsible for all color vision
-concentrated in the center of the retina
-used for detecting fine detail in bright light

Question 3

rod cells in eyes:

Answer 3

-unable to discern color
-located throughout the retina
-very sensitive in low light
-can take 30 mins to fully adapt to night conditions

Question 4

FAA Recommended altitude for using supplemental oxygen at night

Answer 4

5000 MSL (compared to 10000 MSL during the day)

Question 5

Items known to decrease night vision:

Answer 5

-smoking
-alcohol
-lack of oxygen
-fatigue
-CO poisoning

Question 6

Landing light is required to be on when landing at night if:

Answer 6

-The airplane is operating for hire

Question 7

Weather considerations for night flight

Answer 7

-cloud bases
-visibility
-temp / dew point spread: make sure you have at least 2 degree difference
-wind direction and speed
-weather forecast at your alternate

Question 8

Appropriate altitude selection for VFR night flight

Answer 8

• Base altitude selection on the highest terrain within 5 miles on either side of the route
• At least 1000 ft higher than Max Elevation Figure in the chart for flatlands
• 2000 ft for mountainous areas
• Generally at least 3000 ft AGL
  (At the appropriate VFR altitude based on direction)