Figure 1-13.—AN/PVS-7A NVG

162.1 Figure 1-13.—AN/PVS-7A NVG. a BA 5567 lithium battery or two BA 3058 “AA” alkaline batteries. MAINTENANCE Most maintenance on night vision equipment is preventive maintenance only (i.e., clean and inspect) and can be completed with little to no problems. Corrective maintenance is primarily limited to the depot level. Therefore, if you experience a minor problem with night vision equipment, you must sent it to the Naval Surface Warfare Center, Crane, Indiana, for repair. Throughout this chapter, we have introduced night vision devices that are in use in the Navy today. This area of technology is continually expanding. As it does, your knowledge of this area should also grow. The next chapter will introduce you to laser systems and the safety precaution needed for their use. 1-11