What does the "V" signify in the AN/AVS-9V Aviators Night Vision Goggles?

The "V" in the AN/AVS-9V Aviators Night Vision Goggles signifies that there are many versions in service. This designation indicates that the system has undergone multiple iterations or updates to enhance its capabilities, usability, and performance based on technological advancements and feedback from users in the field. Each version can include improvements in image quality, weight, durability, and various other operational features, allowing for enhanced performance in diverse conditions encountered by aviators. The use of "V" categorically illustrates the evolution of the goggles rather than implying quality or testing processes as suggested by other options.