Style of addressEdit
- Lieutenants, Junior Grade are referred to as "Lieutenant" in informal settings.
- Lieutenant, Junior Grade can be abbreviated as or "LTJG".
- Preston Cole was likely a Lieutenant, Junior Grade when he was aboard the UNSC Las Vegas during the Callisto Incident. Though he is referred to as a "Second Lieutenant," that is not a Navy rank, therefore he was most likely a Lieutenant, Junior Grade, or the Navy equivalent to 2nd Lieutenant, Ensign.
- Jacob Keyes was this rank when he first traveled with Catherine Elizabeth Halsey on the shuttle, Han, to seek out potential SPARTAN-II candidates.
|UNSC Defense Force commissioned officer ranks|
|Air Force:||2nd Lt||1st Lt||Capt||Maj||Lt Col||Col||Brig Gen||Maj Gen||Lt Gen||Gen||GOAF|