Captain

Captain is is a senior ranking officer in the various of militaries across the world; acting as a commanding officer of sorts.
==Earth Kingdom==
===Army===
A captain is the commander, or second-in-command, of a company of soldiers or a squadron. In Omashu, it was shown that captains are of a high enough rank to be able to speak with the King of Omashu and discuss military affairs.
Known captains include:
* Captain Yung
* Earthbender captain
===Air Force===
A captain is an officer who commands an airship and its crew.
Known captains include:
* Ba Sing Se airship captain
==Fire Nation==
===Army===
Captain (), also a rank in the Fire Nation's Navy and air force, was an officer rank below colonel. Usually, captains led units into battles. Some captains were in charge of garrisons.
Known captains include:
* Captain Chey (prior to desertion)<
* Guard captain
===Navy===
A captain is an officer charged with overseeing a particular vessel. They're under the direct command of a commander. A captain could also oversee a royal vessel, a position held, for example, by Azula's ship captain. Captain is also a rank in the air force.
Known captains include:
* Azula's ship captain
* Captain Li
* Captain Zhao (prior to gaining the rank of Commander)
===Air Force===
Captain was a rank in the Fire Nation Air Force. Captains were given command of Fire Nation airships and their crews. Captain is also a rank in the Fire Nation Navy as well as the Fire Nation Army.
Known captains include:
* Fire Nation airship captain
==United Republic of Nations==
===United Forces===
Captain () is a senior officer rank in both the United Forces Navy and its Airforce. A captain is charged with the overseer of a vessel, and may sometimes command a small group of vessels
Known captains include:
* James Cook
==Trivia & Notes==
*Cook's uniforms is variantly different to any other known officer uniform.