NVG Flashcards
What tool can help maintain aircraft control when hovering over low-contrast or disorienting surfaces?
In eye symbology: HUD/I-HUD/HDU
What component of the eye adjusts pupil size to allow light into the eye?
Iris
_____ cells are less effective as light levels decrease
Cone
Which type of vision is characterized by lack of color perception and required off center viewing?
Scotopic vision
Rhodopsin
30-45 minutes to buildup
Bleached out by bright light
How long does it take to recover dark adaptation due to exposure to a bright light?
5-45 minutes depending on duration and intensity of exposure
When is the lenses flexible?
When the individual is young
Where does the optic nerve enter the retina
The optic disk
What is the transition zone between photo pic and scotopic vision?
Mesopic vision
Dark adaptions takes how long?
30-45 min
How long is the night blind spot?
5-10 degrees
What information does motion parallax provide aviators?
Aircraft speed and direction of movement
How to clean dirty contacts using a ______
Pencil eraser
Which lense assembly contains the minus blue coating which filters out light from the aircraft instrument panel?
Objective lens
What item is used to clean the ANVIS electrical contacts?
Pencil eraser
What are the four Operational defects?
Shading
Edge glow
Emission points
Flashing/flickering and intermittent operation
On off switch is oriented
Up
You cannot mix what type of batteries
Alkaline and lithium
What kind of batteries can you not use
Rechargeable batteries
Primary batteries are on what side
Right
Low battery indicator
Re blinking light with 30 min remaining
Max counterweight
22 ounces
What is the only authorized counterweight
The bag
Anvis
Passive system
1:1 magnification
40 degree FOV
Anvis may degrade above what temperature
100 degrees
Anvis Breakaway capability
10-15 g forces
Halo
Is electron backscatter
Rod cells
Rod photoreceptors are mainly responsible for low-light vision and night vision
Cone cells
They’re why the center of your visual field can see colors and other fine details.
What factors increase the likelihood of experience visual illusion or spatial D?
Degraded visual acuity, fatigue, high task loading, reduced FOV, and inexperience
Battlefield light sources can negatively impact the ANVIS image due to what power supply functions being activated?
Automatic brightness control (ABC)
Bright source protection (BSP)
Effective use of monocular cues requires _____ and _____ in various terrain types and flight environments
Training and experience
What is the normal FOV of the human eye?
Approximately 120 degrees vertical and 200 degrees lateral
If ambient light levels unexpectedly decrease what indications may be present?
Scintillation, change in halo intensity, loss of celestial lights, loss of ground lights, noticeable loss of scene detail
When only two light sources are available to mark the LZ what is the minimum distance between the lights?
15 feet
What are the 5 mission planning command considerations?
Crew endurance, aircraft maintance, safety, facilities and planning cell
What is the landing zone or objective card for?
Reinforce map recon and provides a graphic picture of the LZ/PZ or objective
When possible members of the planning cell should be?
Excused from other duties and responsibilities during the planning phase
What is the first step if an aviator becomes disoriented during flight?
Locate and identify a prominent feature in the immediate area
How many types of routes planning cards are there?
3
When using supplemental lighting what color should the light be?
Blue-green
