Captain is the name most often given in English-speaking navies to the rank corresponding to command of the largest ships. The rank is equal to the army rank of colonel and air force rank of group cap
Royal Navy captain's rank insignia during Divisions conducted at HMNB Clyde, 2013
Captain from US Navy (at left) and Senior Captain from PLA Navy, 2015
Front page of the Breve Compendio do que pertence à obrigação de hum Capitão de Mar, & Guerra, or "Brief compendium of what pertains to the obligation of a captain of sea and war" (1676)
Portrait miniature of the Portuguese captain of sea and war André de Sousa Ferreira in 1751.
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, captain is
Captain (naval)
…Captain's cabin Captain (United States) Captain (Royal Navy…
U.S. Coast Guard Captain Jessica Rozzi-Ochs of USCGC Eagle, left, and U.S. Navy Commander Billie J. Farrell of USS Constitution, right, were the first female commanding officers of their respective ships
Navy submarine captain Michael Bernacchi, serving as a chief of staff to a flag officer