All,
We recently discovered a BNP674 belonging to my Father in law, Lutz, Wilbur W. S2c who was a Navy Armed Guard.
It indicates that Wilbur completed the prescribed course of study at the "Naval Mine Warfare School, Yorktown, Virginia"
The next line says "A/TD MK 29 (Seaman)".
Can anyone identify if this was a course name or was it a specific piece of equipment as in a MK 29 model of automatic or anti-torpedo defense.