Commander is a rank used primarily in
navies, and is very rarely used as a rank in
armies. In most armies, the term "commander" is used as a job title. For example, in the
US Army, an officer with the rank of
captain (
NATO rank code OF-2) may hold the title of "
company commander", whereas an officer with the rank of
lieutenant colonel (
NATO rank code OF-4) typically holds the title of "
battalion commander". The title, originally "master and commander", originated in the 18th century to describe naval officers who commanded ships of war too large to be commanded by a lieutenant but too small to warrant the assignment of a
post-captain and (before about 1770) a
sailing master; the commanding officer served as his own master. In practice, these were usually unrated
sloops-of-war of no more than 20 guns. The
Royal Navy shortened "master and commander" to "commander" in 1794; however, the term "master and commander" remained (unofficially) in common parlance for several years. The equivalent American rank
master commandant remained in use until changed to
commander in 1838. A corresponding rank in some navies is
frigate captain. In the 20th and 21st centuries, the rank has been assigned the
NATO rank code of OF-4. Various functions of commanding officers were also styled
commander. In the navy of the
Dutch Republic, anyone who commanded a ship or a fleet without having an appropriate rank to do so could be called a . This included
ad hoc fleet commanders and acting captains (). In the fleet of the
Admiralty of Zeeland however, was a formal rank, the equivalent of (rear-admiral) in the other Dutch admiralties. The Dutch use of the title as a rank lives on in the
Royal Netherlands Navy, as the equivalent of
commodore. In the
Royal Netherlands Air Force, however, this rank is known by the English spelling of which is the Dutch equivalent of the British
air commodore.
Australia The rank of commander in the
Royal Australian Navy (RAN) is identical in description to that of a commander in the British
Royal Navy. RAN chaplains who are in divisions 1, 2 or 3 (of five divisions) have the equivalent rank standing of commanders. This means that to officers and NCOs below the rank of commander, lieutenant colonel, or wing commander, the chaplain is a superior. To those officers ranked higher than commander, the chaplain is subordinate. Although this equivalency exists, RAN chaplains who are in divisions 1, 2 or 3 do not actually wear the rank of commander, and they hold no command privilege.
Canada Romania The rank of commander ( in Romanian) is used by both the
Romanian Air Force and
Romanian Naval Forces. It is equivalent to the army rank of
Colonel (
OF-5). In both cases, the rank is above (, OF-4). In the air force, is below the rank of (), while in the navy it is below (). The rank was also used in the
Royal Romanian Air Force and Navy until
the proclamation of the Republic.
Scandinavia Commander is a naval rank in Scandinavia ( in Danish and Norwegian, in Swedish) The Scandinavian rank of commander is immediately above "
kapteinløytnant" ({{langx|da|kapteinløynant}, {{}, {{langx|sv|[}),
Denmark In Denmark, the rank of commander exists as (commander captain or commanding captain), which is senior to (captain) and (commander), which is senior to . is officially translated into English as "Commander, Senior Grade", while is officially translated as '"Commander."
United Kingdom Royal Navy A commander in the Royal Navy is above the rank of
lieutenant commander, below the rank of
captain, and is equivalent in rank to a
lieutenant colonel in the army. A commander may command a
frigate,
destroyer,
submarine, aviation squadron or shore installation, or may serve on a staff.
Royal Air Force Since the British
Royal Air Force's mid-rank officers' ranks are modeled on those of the
Royal Navy, the term
wing commander is used as a rank, and this is the equivalent of a
lieutenant colonel in the army or a commander in the navy. The rank of wing commander is above that of
squadron leader and below that of
group captain. In the former
Royal Naval Air Service, which was merged with the
Royal Flying Corps to form the Royal Air Force in 1918, the pilots held appointments as well as their normal ranks in the Royal Navy, and they wore insignia appropriate to the appointment instead of the rank. A flight commander wore a star above a lieutenant's two rank stripes, squadron commander wore two stars above two rank stripes (less than eight years' seniority) or two-and-a-half rank stripes (over eight years seniority), and wing commander wore three rank stripes. The rank stripes had the usual Royal Navy curl, and they were surmounted by an eagle.
United States In the
United States Navy,
United States Coast Guard,
United States Public Health Service Commissioned Corps, and
National Oceanic and Atmospheric Administration Commissioned Officer Corps, commander (abbreviated "CDR") is a senior-grade officer rank, with the pay grade of O-5. Commander ranks above
lieutenant commander (O-4) and below
captain. (O-6). Commander is equivalent to the rank of
lieutenant colonel in the
United States Army,
United States Air Force,
United States Marine Corps, and
United States Space Force. Notably, commander is the first rank at which the holder wears an embellished cap, whereas officers of the other military services are entitled to embellishment of similar headgear at O-4 rank. Promotion to commander in the U.S. Navy is governed by
United States Department of Defense policies derived from the
Defense Officer Personnel Management Act (DOPMA) of 1980 or its companion
Reserve Officer Personnel Management Act (ROPMA). DOPMA/ROPMA guidelines suggest that 70% of lieutenant commanders should be promoted to commander after serving a minimum of three years at their present rank and after attaining 15 to 17 years of cumulative commissioned service, although this percentage may vary and be appreciably less for certain officer designators (i.e., primary "specialties") depending on defense budgets, force structure, and the needs of the service.
Gallery File:Generic-Navy-6.svg|Commander(
Antigua and Barbuda Coast Guard) File:Generic-Navy-6.svg|Commander(
Royal Australian Navy) File:Generic-Navy-6.svg|Commander(
Royal Bahamas Defence Force) File:Generic-Navy-6.svg|Commander(
Bangladesh Navy) File:Generic-Navy-6.svg|(
Royal Brunei Navy) File:Generic-Navy-6.svg|Commander(
Barbados Coast Guard) File:Belize Coast Guard OF-4.svg|Commander(
Belize Coast Guard) File:Generic-Navy-6.svg|Commander(
Royal Canadian Navy) File:Generic-Navy-8.svg|(
Royal Danish Navy) File:Generic-Navy-6.svg|Commander(
Republic of Fiji Navy) File:Finland-Navy-OF-4.svg|(
Finnish Navy) File:Generic-Navy-6.svg|Commander(
Gambian Navy) File:Generic-Navy-6.svg|Commander(
Ghana Navy) File:Generic-Navy-6.svg|Commander(
Guyana Coast Guard) File:Generic-Navy-6.svg|Commander(
Indian Navy) File:Generic-Navy-(star)-O5.svg|Commander(
Irish Naval Service) File:Generic-Navy-6.svg|Commander(
Jamaican Coast Guard) File:Generic-Navy-(star)-O5.svg|Commander(
Liberian National Coast Guard) File:Generic-Navy-7.svg|(
Lithuanian Naval Force) File:Generic-Navy-6.svg|(
Royal Malaysian Navy) File:Generic-Navy-6.svg|Commander(
Namibian Navy) File:Generic-Navy-6.svg|Commander(
Royal New Zealand Navy) File:Generic-Navy-6.svg|Commander(
Nigerian Navy) File:Generic-Navy-8.svg|(
Royal Norwegian Navy) File:Generic-Navy-6.svg|Commander(
Pakistan Navy) File:Generic-Navy-12.svg|(
Polish Navy) File:Romania-Navy-OF-5-Sleeve.svg|(
Romanian Naval Forces) File:Romania-AirForce-OF-5 Sleeve.svg|(
Romanian Air Force) File:Generic-Navy-6.svg|Commander(
Sri Lanka Navy) File:Generic-Navy-8.svg|(
Swedish Navy) File:Generic-Navy-6.svg|Commander(
Tanzania Naval Command) File:Generic-Navy-6.svg|Commander(
Tongan Maritime Force) File:Generic-Navy-6.svg|Commander(
Trinidad and Tobago Coast Guard) File:Generic-Navy-6.svg|Commander(
Royal Navy) File:US Navy O5 insignia.svg|Commander(
United States Navy) File:USCG O-5 insignia.svg|Commander(
United States Coast Guard) ==Commander as a military appointment==