BWS / Nights / Mnemonics

Question 1

Employ aviator night vision imaging system

Answer 1

Conduct operators checks
Properly mount ANVIS on the helmet
Adjust ANVIS to obtain the OSAP

CPA

Question 2

React to ANVIS failure

Answer 2

Announce ANVIS/google failure
Transfer flight controls as applicable
Troubleshoot ANVIS failure
Announce results of troubleshooting

ATTA

Question 3

Night vision protection

Protective equipment:

Answer 3

Protective equipment:
Red light
Supplemental oxygen
Sunglasses

Question 4

Protective measures

Answer 4

Cockpit light adjsutment
Exterior light adjustment
Light flash compensation:
Turn away from light source
Close/cover one eye
Aerial weapons system
Automatic weapons systems

Question 5

Night central blind spot

Answer 5

Central or night blindspot
Scotopic vision
Peripheral vision

Question 6

NVG visual deficiencies

Operational / cosmetic

Answer 6

Operational
Shading
Emission points
Edge glow
Flickering, flashing or intermitten operation
Cosmetic
Image distortion
Image disparity
Bright spots
Black spots
Chicken wire
Fixed pattern noice
Output brightness variation

Question 7

NVG operational considerations

Answer 7

Color discrimination
Air/ground speed limits
Lights and lighting
Performance relation
Effects of bright lights
Automatic brightness control (ABC)
Bright source protection (BSP)
Tunnel vision
Magnification
Weather
Weapons
Aircraft lighting
Depth perception and distance estimation
Degree of contrast
Available light
Type of NVDs
Experience
Scanning techniques
Obstruction detection
Spatial disorientation

Question 8

Visual illusions

Answer 8

False horizon
Fascination/fixation
Confusion with ground lights
Vection
Aerial perspective
Structural illusions
Height depth perception
Crater illussion
Autokinesis
(Size distance illussion, size constancy, shape constancy)

Question 9

Distance estimation & Depth perception

Cues

Answer 9

Binocular cues: Different view from each eye - works subconsciously and has little to no value to crewmember

Monocular cues:
Geometric perspective
Linear perspective -
Apperent foreshortening -
Vertical position in the field
Retinal image size
Known size of object -
Increasing/decreasing size -
Terrestrial association -
Overlapping contours
Aerial perspective
Fading colors and shapes -
Loss of detail and texture -
Position of light source / direction of shadow
Motion parallax

Question 10

Dark adaptation

Answer 10

Definition
The process by which the eyes become more sensitive to low levels of illumination
Starting level
Individual - the lower the starting illumination level, the lesser time needed
Sensitivity
?
Time to adapt
(30-45 minute)
Time to readapt
(5-45 minutes, depending of time and serverity)

*Degree of adaptation increases with increasing rhodopsin

Question 11

Nights / NVG

Weather

Answer 11

Ceiling/visibility
(Launch 1000/3 - REcover 700/1)
Cloud clearance
(Airspace)
Winds
(Terminate - 30 kts / gust spread 15 kts)