Military specification MIL-M-18371 covers the requirements for two types of emergency signaling mirrors, designated as Mark 3.

History

• 1997-09-17: Revision E Notice 1 - inactivation
• 1979-08-06: Revision E Amendment 2
• 1973-05-31: Revision E Amendment 1
• 1969-02-17: Revision E
• 1966-07-18: Revision D

Reference

• https://quicksearch.dla.mil/qsDocDetails.aspx?ident_number=12866