What does O1 stand for?

O1 stands for "Officer grade: Ensign or 2nd Lieutenant"

How to abbreviate "Officer grade: Ensign or 2nd Lieutenant"?

"Officer grade: Ensign or 2nd Lieutenant" can be abbreviated as O1

What is the meaning of O1 abbreviation?

The meaning of O1 abbreviation is "Officer grade: Ensign or 2nd Lieutenant"

What does O1 mean?

O1 as abbreviation means "Officer grade: Ensign or 2nd Lieutenant"