swallow-tailed pennant has a white field bounded by two horizontal blue stripes, with the numerical designation or the initials of the command title in blue centered on the white field. In the U.S. Navy, commodore billets are considered to be O-6 "major command" assignments for Captains, on par with the commanding officers of major combatant vessels (e.g., aircraft carrier, battleship, guided missile cruiser), commanders of carrier air wings, and commanding officers of major shore installations (e.g., naval air station, naval station, naval base, naval support activity, etc.). In the other U.S. armed services, the level and scope of responsibility of a USN Captain in a commodore billet is equivalent to that of the Commanding Officer of a Marine Regiment, Marine Aircraft Group (MAG) or Marine Expeditionary Unit (MEU) in the U.S. Marine Corps, a wing commander in the U.S. Air Force (even when the USN command is designated as a "Group"), or a brigade commander or O-6 level post commander/installation commander in the U.S. Army. U.S. Coast Guard The U.S. Coast Guard presently designates the USCG captain commanding those U.S. Coast Guard cutters and other afloat and ashore USCG units comprising Patrol Forces Southwest Asia (PATFORSWA) as a "commodore". PATFORSWA is headquartered at Naval Support Activity Bahrain in Manama, Bahrain and its primary area of responsibility is the Persian Gulf, as well as other areas coinciding with that of United States Naval Forces Central Command (NAVCENT). It is currently the only commodore billet in the U.S. Coast Guard and this usage mirrors the USN's use of the title "commodore". Auxiliary components of uniformed services U.S. Coast Guard Auxiliary In the U.S. Coast Guard Auxiliary variants of "commodore" are used as position titles for high level leadership positions (e.g. National Commodore, Deputy National Commodore, District Commodore etc.). While auxiliarists do not hold ranks per se, and it is not usual to address an auxiliarist by position title, these very senior members do use "Commodore" (abbreviated "COMO") as a form of address (e.g. Commodore John Smith; or COMO John Smith). The National Commodore wears insignia similar to that of a Coast Guard vice admiral (three stars), the Vice National Commodore and the four Deputy National Commodores wear insignia similar to that of a rear admiral upper half (two stars), and the eight Assistant National Commodores and each District Commodore wear insignia similar to that of a rear admiral lower half (one star).