Commander (disambiguation)
From Halopedia, the Halo wiki
Template:Rank Infobox Commander is a senior commissioned officer rank of the UNSC Navy, equal in rank to Lieutenant Colonel in the UNSC Marine Corps.
Commanders typically serve as the executive officer (XO) (second in command) of a UNSC Warship. However, they may also command a UNSC Warship.
Sources
In reference to the above image, this is the U.S. Navy insignia for a Commander, which is also used by UNSC Navy. Reference: It is visible on Commander Miranda Keyes' uniform during Halo 2 cinematics.