Alternate Use
The AN/PVS-4 is also commonly used for surveillance operations and surplus units are commonly donated to police forces.
There are also surveillance model derivatives specifically designed to use civilian versions of the tube, such as the Star-Tron, which uses the ITT F4845 25mm tube.
Additionally, companies such as AB Night Vision also produce after-market surveillance device housings such as the NVM-4A for law enforcement and civilian use that take surplus military MX9644 tubes.
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