Frigate Captain is a naval rank.

It is equivalent to the Royal Navy / Commonwealth / US Navy rank of Commander. The Royal Navy of the United Kingdom is the oldest of the British armed services (and is therefore the Senior Service). ... The English noun Commonwealth dates originally from the fifteenth century. ... The United States Navy (USN) is the branch of the United States armed forces responsible for naval operations. ... Commander is a military rank which is also sometimes used as a military title depending on the individual customs of a given military service. ...

Countries using this rank include Argentina (Spanish: Capitán de Fragata), France (French: Capitaine de Fregate), Germany (German: Fregattenkapitän) and Spain (Spanish: Capitán de Fragata).