Theoretically the Mark series should have
gone away when the tri-service designations took over in 1962, but remnants
of it
remain in use.

....such as in all types of USN torpedoes in use today. Not to mention
thousands of Mk 82s (and dozens of other weapon types).

v/r
Gordon
====(A+C====
USN SAR

Donate your memories - write a note on the back and send your old photos to a
reputable museum, don't take them with you when you're gone.