2.5 Night Operations Training Flashcards
As defined in 14 CFR Part 107, civil twilight in the continental U.S. exists from:
a. 30 minutes before official sunrise to official sunrise, AND 30 minutes from official sunset to after official sunset.
b. 1 hour before official sunrise to official sunrise, AND 1 hour from official sunset to after official sunset.
c. official sunrise to official sunset.
a. 30 minutes before official sunrise to official sunrise, AND 30 minutes from official sunset to after official sunset.
According to 14 CFR Part 107, what is required to operate a small unmanned aircraft within 30 minutes after official sunset?
a. Use of anti-collision lights.
b. Must be operated in a rural area.
c. Use of a transponder.
a. Use of anti-collision lights.
It’s 40 minutes until official sunrise. How long must you wait to operate your unmanned aircraft if you don’t have anti-collision lighting?
a. 10 minutes
b. 40 minutes
c. 140 minutes
b. 40 minutes
When may a remote pilot reduce the intensity of an aircraft’s lights during a night flight?
a. At no time may the lights of an sUAS be reduced in intensity at night.
b. When a manned aircraft is in the vicinity of the sUAS.
c. When it is in the interest of safety to dim the aircraft’s lights.
c. When it is in the interest of safety to dim the aircraft’s lights.
2.5.2
If you need light when setting up your drone and running through your final pre-flight checklist, consider using _____ filtered light source.
a. an optic
b. a red
c. a white
b. a red
You see a manned aircraft in the distance while flying your drone at night. On the left, you’re seeing a green light and on the right, you’re seeing a red light. Which direction is the aircraft headed?
a. It depends how bright the lights are
b. It’s heading toward you
c. It’s heading away from you
b. It’s heading toward you
Your eyes take approximately _____ minutes to fully adapt to darkness. That adjustment can take longer depending on the amount of light in the environment you just left.
5
10
30
30
At night, when you’re scanning the sky in 30° increments, you shouldn’t pause for more than _____ seconds to avoid night vision limitations.
2-3
3-5
5-10
2-3
Of all the self-imposed stressors that can affect your night flight operations, _____ most decreases visual sensitivity at night.
a. hypoglycemia
b. cigarette smoking
c. nutritional deficiency
b. cigarette smoking
You see a manned aircraft in the distance while flying your drone at night. On the left, you’re seeing a green light. On the right, you’re seeing a red light. Which direction is the aircraft headed?
a. It depends how bright the lights are
b. It’s heading toward you
c. It’s heading away from you
b. It’s heading toward you
At night, drone pilots and other crew members should use off-center viewing, where you’re _____.
a. looking directly at an object, but for no more than 2-3 seconds at a time
b. looking directly at an object with both eyes, alternating opening and closing your right and left eyes every 2-3 seconds
c. not looking directly at an object. You’re looking 10° above, below, or to either side of the object
c. not looking directly at an object. You’re looking 10° above, below, or to either side of the object
When preparing for a night flight, what should an sUAS pilot be aware of after assembling and conducting a preflight of an aircraft while using a bright flashlight or work light?
a. Once adapted to darkness, a persons eyes are relatively immune to bright lights.
b. It takes approximately 30 minutes for a persons eyes to fully adapt to darkness.
c. The person should use a flash light equipped with LED lights to facilitate their night vision.
b. It takes approximately 30 minutes for a persons eyes to fully adapt to darkness.
2.5.3
At night, your eyes don’t work as well when staring directly at an object. Your _____ are concentrated in the center of the retina. And because they only work well in bright light, you have a blind spot in the center of the field of vision.
rods
cones
fovea
cones
2.5.4
A light flickering at a rate between 4 and 20 cycles per second can cause _____.
a. flicker vertigo for manned aircraft pilots, but not typically for drone pilots
b. unpleasant and dangerous reactions like nausea, vomiting, and vertigo
c. your peripheral vision to be severely affected by up to 10 minutes
b. unpleasant and dangerous reactions like nausea, vomiting, and vertigo
Autokinesis is a kind of phantom motion that is caused by _____.
a. fixating on one source of light
b. visual scanning
c. red filtered light sources
a. fixating on one source of light
