What is naval jack?

A naval jack is a flag specifically designed to be flown from the jackstaff of a naval vessel. It typically features the national colors or emblem of the country to which the vessel belongs, and may also include other symbols or insignia to represent the particular branch of the navy or specific ship it is associated with. Naval jacks are a long-standing tradition in naval history, dating back centuries, and continue to be an important symbol of national pride and identity for modern navies around the world. In some cases, naval jacks may also have ceremonial or tactical significance, such as signaling a specific message or marking the presence of a particular naval unit.