In the

Royal Navy The Royal Navy (RN) is the United Kingdom's naval warfare force. Although warships were used by Kingdom of England, English and Kingdom of Scotland, Scottish kings from the early medieval period, the first major maritime engagements were foug ...

, a flag captain was the captain of an admiral's flagship. During the 18th and 19th centuries, this ship might also have a " captain of the fleet", who would be ranked between the admiral and the "flag captain" as the ship's "First Captain", with the "flag captain" as the ship's "Second Captain". Unlike a " captain of the fleet", a flag-captain was generally a fairly junior post-captain, as he had the admiral to keep an eye on him, but – like a "captain of the fleet" – a "flag captain" was a post rather than a rank.

References

F Royal Navy {{navy-stub