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Operation - 14243_37
NIGHT VISION GOGGLES - 14243_39

Signalman 1 & C - Aviation theories and other practices
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The following steps are required to place the MK 37 NVS in operation: 1. Place the power switch in the ON position. 2. Press your eye against the monocular lens eyeshield flap and view the image, or view the image with both eyes through the binocular eyepiece. 3. Adjust the diopter ring to create a sharp reticle image. 4. Adjust the focus ring for a clear image of the object desired. AN/PVS-8 The AN/PVS-8 (fig. 2-17) is a portable, shipboard-mounted, battery-operated NVS used for long-range surveillance. The unit uses the mounting system common to the Mk 37 NVS. An eye shield is used to prevent the visible light emitted from the eyepiece from being externally visible on the operator's face. Power is provided by two 1.5V AA batteries with a life of 60 hours. Magnification of the unit is 6.2X with a 4.7-degree field of view. As with other NVSs, an internal image intensifier tube amplifies available light such as moonlight, starlight, and skyglow, so the scene becomes visible to the operator. An automatic brightness control is provided to automatically maintain the viewed scene illumination contrast during periods of changing light level conditions. The manual gain control (tube brightness) will not function when the automatic brightness control is in operation. The image Figure 2-17.—AN/PVS-8 long range night vision sight. intensifier tube also has protection from high-intensity, short-duration flashes of light. OPERATION Setup and operation of the AN/PVS-8 is similar to the Mk 37; actions required prior to installation are as follows: 1. Relieve air pressure inside the carrying case by pressing the core of the relief valve, before releasing the latches. 2. Release all case latches and remove the cover. 3. Inventory and inspect the contents to ensure they are ready for installation. Setup of the NVS consists of mounting the sight on the appropriate operational location and installing the batteries. Remove the NVS from the storage case. Secure the pintle in the bracket and locking assembly. Rotate the TUBE BRIGHTNESS control switch fully counterclockwise to the OFF position. Insert the batteries and replace the battery cap. The sight is now ready for operation. CAUTION Do not leave the batteries in the equip- ment during storage, or corrosive damage may result. Do not remove the cover in daylight. The following steps are required to place the AN/PVS in operation: 1. Rotate the TUBE BRIGHTNESS control clockwise to turn on the NVS. 2. Press your face against the eyeguard and view the image. 3. Adjust the TUBE BRIGHTNESS control to the setting that provides good target to background contrast. 4. Adjust the range focus ring for a clear image of the object desired. Now that you have the sights operational, you must learn scanning procedures. A well-trained operator will see more than an inexperienced one. Targets that are readily identifiable by a trained observer will invariably escape detection by the 2-16







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