MIL-DTL-62420B, DETAIL SPECIFICATION: PERISCOPE, TANK (04-SEP-1998) [SUPERSEDING MIL-PRF-62420A]

MIL-DTL-62420B, DETAIL SPECIFICATION: PERISCOPE, TANK (04-SEP-1998) [SUPERSEDING MIL-PRF-62420A]., This specification covers the laser protected tank periscope assemblies. Unless otherwise specified herein, these items will be referred to as �periscopes�. These periscopes are used as unity vision devices in combat type vehicles.