Module 3 Recap Flashcards
(25 cards)
Evening civil twilight is the period of sunset until _____ minutes after sunset and morning civil twilight is the period of _____ minutes prior to sunrise until official sunrise.
30
UAs flown during civil twilight (or at night) are required to be equipped with anti-collision lights that are visible for _____ statute miles.
3
Are you allowed to decrease the intensity of anti-collision lights?
Yes, for safety reasons
Your eyes take approximately _____ minutes to fully adapt to darkness
30
If you need light when setting up your drone and running through your pre-flight checklist, consider using a _____ filtered light source.
Red
Identifying objects at night is done by scanning from left to right in _____ degree increments and pausing no longer than 2 to 3 seconds to focus on an object.
30
Off-center viewing is a technique that requires an object be viewed by looking _____ degrees above, below, or to either side of the object which allows the peripheral vision to be used to see the object.
10
Objects viewed with off-center vision will disappear if viewed longer than _____.
2-3 seconds
_______________ is the most common self-imposed stressor and greatly decreases visual sensitivity at night.
Cigarette smoking
Navigation lights help determine the direction of travel of an aircraft. A _____ light is on the left wing of an airplane.
Red
Navigation lights help determine the direction of travel of an aircraft. A _____ light is on the right wing of an airplane.
Green
Navigation lights help determine the direction of travel of an aircraft. A _____ light is on the rear of the airplane.
White
You’re flying a drone and see a manned aircraft with red and green lights in the distance. Which direction is the aircraft flying?
If you see red and green lights, the aircraft is flying toward you.
You’re flying a drone and see a manned aircraft with a white light in the distance. Which direction is the aircraft flying?
If you see only a white light, the aircraft is flying away from you.
You’re flying a drone and see a manned aircraft with red and white lights in the distance. Which direction is the aircraft flying?
If you see red and white lights, the aircraft is flying from right to left.
The eye has light-sensitive nerves called “cones” and “rods.” _____ are used to detect color, details, and faraway objects and works best in bright lighted conditions.
Cones
The eye has light-sensitive nerves called “cones” and “rods.” _____ are unable to discern color but are very sensitive in low-light levels and much better at detecting movement and providing vision in dim light.
Rods
In the absence of normal light, night vision relies almost entirely on _______________ for night vision.
The rods and off-center viewing
During daylight, an object is best seen by looking directly at it. At night, there is a _______________ in the center of the field of vision. The size of this _______________ increases as the distance between the eye and the object increases and large objects can be hidden from view.
Blind spot
_______________ can occur when staring at a single light source for several seconds on a dark night – the light appears to move on its own.
Autokinesis
The inability to determine if an object is moving towards you or away from you is called the _______________.
Reversible Perspective Illusion
The ________________ results from viewing a light source with an increasing or decreasing brightness. Pilots may interpret the light as moving toward or away from them
Size-Distance Illusion
_______________ can occur when viewing a light with a flash rate between 4 and 20 cycles per second. The flashing light can produce conditions such as nausea, vomiting, and vertigo.
Flicker Vertigo
A _______________ occurs when a landing is made from over water or non-lighted terrain where the runway lights are the only source of light.
“Black-hole approach”
