MIL-P-18981 Complete Document History
Power Drive, Electric-Hydraulic, for 40mm Gun Mounts (Elevation Mark 5 Mods 15, 16, and 17, Train Mark 5 Mods 18, 19, and 20, and Train Mark 6 Mods 9, 10, and 11) (No Superseding Document)


Obsolete Revision Information:
   CAN NOT 1 - POWER DRIVE, ELECTRIC-HYDRAULI - Jan. 18, 1980
   BASE - POWER DRIVE, ELECTRIC-HYDRAULI - Jan. 1, 1960