MIL-S-23399 Complete Document History
Signal, Underwater Sound Mark 57 Mod 0


Obsolete Revision Information:
   NOT - SIGNAL, UNDERWATER SOUND MARK - May 3, 1971
   BASE - SIGNAL, UNDERWATER SOUND MARK - Oct. 26, 1964
   AMENDMENT 1 - SIGNAL, UNDERWATER SOUND MARK - Jan. 1, 1960