Captain is both a nautical term and a rank in various uniformed organizations. The word came to English via French from the Latin capitaneus ("chief") which is itself derived from the Latin word caput ("head").
The term has different meanings both at sea and in the military. Confusion between the different types of captain (nautical, naval and army) often exists in literature, drama and real life. The customs indicated are necessary to avoid confusion at sea when the question of "Who is in charge of the ship?" may be a matter of life and death.
The captain of a ship at sea is in absolute command of that vessel even if higher-ranking persons are aboard. If higher-ranking persons give orders to the nautical captain, such persons are very careful to say what they want done rather than specifying how the orders are to be carried out, because even higher rank does not give them the right to interfere in how a captain runs the ship.
On shore, a harbormaster, as the equivalent "chief" of a port, was sometimes titled "captain" if he had merchant marine or naval rank and professional service in command at sea, but this is rare today.
The traditional sleeve emblem for captains is four gold stripes (often called "rings") on the lower sleeve or shoulderboard. Many navies follow the precedent of the Royal Navy and have an "executive loop" on the top or inner ring. In the Royal Navy, the stripes and rings are called Nelsons if the ring sits above the stripe, and Half Nelson if only half above the stripe. Oftentimes harbormasters have a foul anchor or other local symbol on the gold rings.
The officer who is ranked immediately below the captain of a ship is designated the chief mate, or first officer (also executive officer on Naval vessels), and is responsible for implementing the orders of the captain as well as conferring with the captain on matters concerning the ship. This "second in command" is typically responsible (along with the senior enlisted petty officer) for maintaining minor discipline on the ship. Ranked below the chief mate are the second mate (navigational officer) and the third mate (safety officer).
In older times, a captain was a nobleman given responsibility over a ship, but was not likely to have any nautical experience. The next officer of the ship would be the ship's master, who would carry out the executive functions of a captain, while the titular captain filled a ceremonial and legal role.
Captains with field naval commands generally command ships of cruiser size or larger. The more senior the officer, the larger the ship. Commanders of aircraft carriers can be rear admirals, but generally, ship commanders are of captain rank or lower. Also, many captains are either retired or have desk jobs.
Prior to the professionalization of the armed services of European nations subsequent to the French revolution, a captain was a nobleman who purchased the right to head a company from the previous holder of that right. He would in turn receive money from another nobleman to serve as his lieutenant. The funding to provide for the troops came from the monarch or his government; the captain had to be responsible for it. If he was not, or was otherwise court-martialed, he would be dismissed ("cashiered"), and the monarch would receive money from another nobleman to command the company. Otherwise, the only pension for the captain was selling the right to another nobleman when he was ready to retire.
Captains in the United States Army and Marine Corps generally command and control company-sized units (62 to 190 Soldiers), together with a principal Non Commissioned Officer assistant. They instruct at service schools and combat training centers and are often staff officers at the battalion level. In medical units, captain is the entry-level rank for doctors and registered nurses. In Judge Advocate General units, captain is the entry-level rank for lawyers who already have their academic degree and are members of a Bar.
Captains in the United States Marine Corps are sometimes referred to as "skipper" in informal situations. This term for a captain is most often used by very senior staff non-commissioned officers.
In the United Kingdom, the approximate equivalent rank is chief inspector.
Generally, a fire department captain is in charge of a specific fire station. In paid departments, as opposed to volunteer departments, there is a captain for each shift at each station. In these cases, the senior captain is responsible for the station overall. The head of the training division is often a captain, or there may be multiple captains reporting to a battalion chief of training. Additionally, captains may be assigned over other areas, such as Hazmat response or EMS.
Captain is approximately equivalent to the rank of station officer in the United Kingdom and some other Commonwealth countries.
In the Australian New South Wales Rural Fire Service and Country Fire Authority, the rank of captain indicates the head of a brigade.
In the New Zealand Fire Service in the early 1980's, a captain was in charge of a station. The NZFS has now moved to senior station officer and station officer as station management ranks. The person in charge of a fire brigade is the chief fire officer, and captain is no longer used.
See also: military rank and comparative military ranks
Becoming a Ship's Captain:
Military ranks | Police ranks | Military ranks of Australia | Military ranks of Canada | Military ranks of India | Military ranks of Ireland | Military ranks of Singapore | Military ranks of the United Kingdom | Military ranks of the United States Army | Military ranks of the United States Air Force | United States Marine Corps ranks | Military ranks of the United States Navy
Capità | Hauptmann (Offizier) | Capitán | سروان | Kapteeni | Capitaine | Kapten | 大尉 | Kapitein (rang) | Kaptein | Kapitan | Stotnik | 上校