What does O1 Stand For?
For O1 we have found 4 definitions.
What does O1 mean? We know 4 definitions for O1 abbreviation or acronym in 1 categories. Possible O1 meaning as an acronym, abbreviation, shorthand or slang term vary from category to category. Please look for them carefully.
O1 Stands For:
|*****||O1||Organized Naval Reserve Seagoing|
|***||O1||Officer grade: Ensign or 2nd Lieutenant|