The term “crossjack” refers to a type of sail on a sailing ship, specifically a square sail that is set on the lower mast of a ship’s main mast or a foremast. It is typically used in traditional sailing ships and is often rigged to extend out from the top of the lower mast. The crossjack sail plays a role in enhancing the ship’s maneuverability and speed when sailing downwind. Additionally, the term can also refer to a specific part of the rigging associated with this sail.
