What does UM1 stand for?

UM1 stands for "UNDERWATER MECHANIC 1ST CLASS PETTY OFFICER"

How to abbreviate "UNDERWATER MECHANIC 1ST CLASS PETTY OFFICER"?

"UNDERWATER MECHANIC 1ST CLASS PETTY OFFICER" can be abbreviated as UM1

What is the meaning of UM1 abbreviation?

The meaning of UM1 abbreviation is "UNDERWATER MECHANIC 1ST CLASS PETTY OFFICER"

What does UM1 mean?

UM1 as abbreviation means "UNDERWATER MECHANIC 1ST CLASS PETTY OFFICER"