Introduction Of Night Vision Devices

The objective of this lesson was to enable you to engage targets during hours of limited visibility with the night vision device by proper mounting, operation, and maintenance of this piece of equipment, and explain the capabilities and limitations of each.

1. In order to effectively engage targets during hours of limited visibility, you must know proper procedure for mounting, operation, and operator maintenance of the NVD.

2. The adaptor bracket must be aligned with the mounting groove on the left side of the receiver and tightened securely with an alien wrench before the sight assembly can be installed, by rotating the lock knobs counterclockwise until they stop on the pins on the assembly. You then slide the boresight onto the guide rail until it is positioned against the pinstop. The last step in mounting is to tighten the lock knob by turning clockwise.

3. The first point to remember about operation of the NVD is the mercury battery is irritable to the eyes and other mucus membranes. Even though the image intensifier will turn off automatically to protect the observer, the image intensifier should never be pointed at the sun on or off. The NVD will always be inspected before use. The operational sequence is definite as sbculd always be followed.

4. The NVD will operate from -65 °F to; -125°F and the lenses will have to be cleaned frequently in sandy or dusty areas and will also operate in wet or humid areas.

5. Operator maintenance can be performed with the tools and equipment provided with the exception of a screwdriver and should be followed step-by-

Above all, never use lubricating materials on the NVD.

6. To complicate training, the two scopes in the system (AN/PVS-2 and AN/PV5-4) have sane important differences:

a. They require different zero procedures.

b. They have totally different reticles.

c. They have different mounting and dismounting procedures.

d. Windage and elevation adjustments on the AN/PVS-2 are made in the direction of the error, while adjustments on the AN/FVS-4 are made in the direction of the desired point of impact.

7. At 25 meters, the point of impact for the AN/PVS-2 is 1.2 cm high and an right. The AN/PVS-4 is 1.4 cm high.

AN/PVS-4

Horizontal line from left point of origin 20 feet at ranges shown. Range is in hundreds of meters.

Example:

Vertical lines above or below horizontal line represent 6 feet at ranges shown. Range is in hundreds of meters.

Vertical lines above or below horizontal line represent 6 feet at ranges shown. Range is in hundreds of meters.

Example:

M14-M60 Aiming points. Range is in hundreds of meters.

Use center of two horizontal lines for 0-250 meters.

A) Distance to tank is 800 m

B) Distance to 6T man is 600 m

C) Distance to 61 man is 200 m

Reference: 1M 11-5855-211-10

AN/FVS-2

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