MIL-M-22121 › Complete Document History
Modification Kit, Electronic Equipment, Direction Finder Set an/URD-4 Series Bearing Conversion


Obsolete Revision Information:
   NOT - MODIFICATION KIT, ELECTRONIC E - May 31, 1968
   BASE - MODIFICATION KIT, ELECTRONIC E - April 5, 1960
   AMENDMENT 2 - MODIFICATION KIT, ELECTRONIC E - Jan. 1, 1960