The medium-range NOD, AN/TVS-4 (NODMR) (Figure 2-5), can be tripod- or vehicle-mounted. The device has a
range of 2,000 meters in moonlight, and 1,200 meters in starlight. The AN/TVS-4 is not in the MI battalion.
The AN/TVS-4 (NODMR) is used to observe terrain and detect objects of tactical interest during darkness. It
enables the individual soldier on LPs, forward OPs, and patrols to detect, identify, and observe friendly or enemy
elements, and can be used as a general night vision aid. It is usually emplaced on the best vantage point
overlooking the terrain of interest, and used for sector and perimeter defense. The device can also be used for
adjusting artillery fire during darkness.
Figure 2-5. AN/TVS-4.
Like everything else, night vision devices have limitations beyond which efficiency diminishes. For example--
* Ambient light must be present for light intensification devices.
* Night vision sights must be dismounted to permit unimpeded daylight weapon operations.