Night NVG Tactics

Question 1

Describe OSAP

Answer 1

Optimal Sight Acuity Procedure

Aligned with line of sight, maximum distance from the eyes that still allows for full field of view through the ANVIS

Question 2

How long does it take to reach optimal dark adjustment/night vision acuity?

What are some things that could negatively affect dark adaptation?

Answer 2

30-45 minutes

High PA, illness, tobacco use, recent exposure level and duration to bright light sources

Question 3

What self imposed stressor impairs visual sensitivity the most at night?

Answer 3

Tobacco

Question 4

At night during a VMC approach, when should you determine the need for use of a searchlight?

Answer 4

Before descending below obstacles

Question 5

What are the three types of spatial disorientation?

Answer 5

Type I- unrecognized
Type II- Recognized
Type III- Incapacitating

Question 6

What are the two types of vestibular illusions?

Answer 6

Somatogyral- semicircular canals

Somatogravic- otolith organs

Question 7

What are NVG considerations for TASK 1004: Plan a Visual Flight Rules Flight?

Answer 7

More detailed planning is necessary at night because of visibility restrictions. Checkpoints used during the day may not be suitable for night or NVG use.

Question 8

What are the NVG considerations for TASK 1026: Maintain Airspace Surveillance?

Answer 8

Using proper scanning techniques will assist in detecting traffic and obstacles, and in avoiding spatial disorientation. Hazards such as wires are difficult

Question 9

What are NVG considerations for TASK 1028: Perform Hover Power Check?

Answer 9

The crew will use proper scanning techniques to avoid excessive drift when hovering at night or using NVGs.

[F] if excessive drift occurs P* should use DAFCS hover modes.

Question 10

What are the NVG considerations for TASK 1038 Perform hovering Flight?

Answer 10

1. Movement over areas of limited contrast, such as tall grass, water or desert tends to cause spatial disorientation. Seek HVR areas that provide adequate contrast and use proper scanning techniques.
2. If disorientation occurs, P* will perform any of the following.
   a. Apply sufficient PWR and execute an ITO, TASK 1170

b. [F] Arm the appropriate DAFCS modes.
c. If takeoff is not feasible, try to maneuver the aircraft forward and down to the ground, to limit the possibility of touchdown with sideward or rearward movement.
d. The P will take the flight controls
3. When performing operations during unaided night flight, ensure the searchlight or landing light (white light) is in the desired position. Use of the white light may impair night vision for several minutes. Therefore, exercise added caution if resuming flight before reaching full dark adaptation.