NVG

Question 1

The quality of depth perception in a given situation depends on factors including:

Answer 1

○ Available light
○ Type and quality of NVG
○ Degree of contrast in the FOV
○ User experience

Question 2

NVG Characteristics (DIAL VP)

Answer 2

Definition
Intensification
Acuity
Limited FOV
Voltage low indicator
Power supply

Question 3

Nvg Definition

Answer 3

● The NVGs are a helmet mounted binocular light intensification device which enables air crews to fly terrain flight under low ambient light conditions
● Function is passive in nature

Question 4

Intensification

Answer 4

● 2000 to 3000 with zero magnification

Question 5

Acuity

Answer 5

● 20/25 best to 20/70 worst

Question 6

Limited FOV FOV

Answer 6

● Slow head movement can increase the view of the field but users are ALWAYS limited to a 40 degree

Question 7

Voltage Low Indicator

Answer 7

● Approximately 30 minutes remaining

Question 8

Power Supply

Answer 8

● AA Alkaline or Lithium, no mixing
○ Aircraft Power Supply
○ Battery Power Pack
○ Clip-On Battery

Question 9

NVG Limitations/Visual Deficiencies

Answer 9

■ Operational Defects
■ Cosmetic Blemishes

Question 10

Operational Defects

Answer 10

(SEEF)
● Shading
● Edge Glow
● Emission Points
● Flashing/Flickering

Question 11

Cosmetic Blemishes

Answer 11

(IF-IC-BOB)
● Image Disparity
● Fixed Pattern Noise
● Image Distortion
● Chicken Wire
● Bright Spots
● Output Brightness Variation
● Black Spots

Question 12

NVG Operational Considerations

Answer 12

CALMWWADSOS
■ Color Discrimination
■ Air/Ground Speed Limits
■ Lights and Lighting
■ Magnification
■ Weather
■ Weapons
■ Aircraft Lighting
■ Depth Perception and Distance Estimation
■ Scanning Techniques
■ Obstruction Detection
■ Spatial Disorientation

Question 13

Automatic Brightness Control

Answer 13

ABC for me
Maintains image brightness for the viewer through micro channel plate

Question 14

Bright Source Protection

Answer 14

BSPfor goggles
Protects goggles from damage

Question 15

Operational Defects

Answer 15

These defects relate to the reliability of the image intensifier and are an indication of instability. Calls for an immediate cause for rejecting the ANVIS.

Shading
Edge glow
Flashing/flickering/intermittent op
Emission points

Question 16

What calls for immediate rejection of an ANVIS

Answer 16

Operational defects

Question 17

Cosmetic Blemishes

Answer 17

result of manufacturing imperfections that do not affect image intensifier reliability and are not normally a cause for rejecting an ANVIS

Question 18

Shading

Answer 18

indicative of a dying photocathode caused by a defective vacuum seal of the image intensifier.

Shading is very dark and you cannot see an image through it

Question 19

Edge Glow

Answer 19

Edge glow is a bright area.
defective phosphor screen that permits light feedback to the photocathode.
Cover with hand if still there return ANVIS

Question 20

Flashing, Flickering, or Intermittent Operation

Answer 20

check for loose wires, loose battery cap/door, or weak batteries.

If the problem cannot be corrected, do not fly with this condition.

Question 21

Emission Points

Answer 21

steady or fluctuating pinpoint of bright light in the image area that does not go away when all light is blocked from the objective lens of that monocular

Question 22

Bright Spots

Answer 22

These are signal-induced blemishes in the image area caused by a flaw in the film on the MCP. A bright spot is a small, non-uniform, bright area that is constant

Question 23

Black Spots

Answer 23

These are cosmetic blemishes in the image intensifier or dirt or debris between the lenses

Question 24

Fixed-Pattern Noise (Honeycomb)

Answer 24

This is usually a cosmetic blemish characterized by a faint hexagonal pattern throughout the viewing area that most often occurs at high light levels or when viewing very bright lights

Question 25

Chicken Wire

Answer 25

An irregular pattern of dark thin lines in the field-of-view either throughout the image area or in parts of the image area

Question 26

Image Disparity

Answer 26

This condition may exist when there is a difference in brightness between the two image intensifier assemblies within the same binocular

Question 27

Chicken Wire

Answer 27

An irregular pattern of dark thin lines in the field-of-view either throughout the image area or in parts of the image area

Question 28

Output Brightness Variation

Answer 28

This condition is evidenced by areas of varying brightness in or across the image area.

Question 29

Image Distortion

Answer 29

vertical objects, such as trees or poles appearing to wave or bend when your head is moved horizontally when looking through the ANVIS