On a square rig

Square rig

Square rig is a generic type of sail and rigging arrangement in which the primary driving sails are carried on horizontal spars which are perpendicular, or square, to the keel of the vessel and to the masts. These spars are called yards and their tips, beyond the last stay, are called the yardarms...

ged sailing

Sailing

Sailing is the propulsion of a vehicle and the control of its movement with large foils called sails. By changing the rigging, rudder, and sometimes the keel or centre board, a sailor manages the force of the wind on the sails in order to move the boat relative to its surrounding medium and...

 vessel, a topgallant sail is the square-rigged sail or sails immediately above the topsail

Topsail

A topsail is a sail set above another sail; on square-rigged vessels further sails may be set above topsails.- Square rig :On a square rigged vessel, a topsail is a square sail rigged above the course sail and below the topgallant sail where carried...

 or topsails. It is also known as a gallant or garrant sail.

Later full rigged ship

Full rigged ship

A full rigged ship or fully rigged ship is a sailing vessel with three or more masts, all of them square rigged. A full rigged ship is said to have a ship rig....

s split the topsail (and often the topgallant sail) for easier handling. They thus fly two topsails (and possibly two topgallant sails) per mast. The lower topgallant sail is immediately above the upper topsail. The upper or only topgallant sail is set from the top of the topgallant mast, if there is a lower topgallant it is set from midway down the topgallant mast. A staysail

Staysail

A staysail is a fore-and-aft rigged sail whose luff can be affixed to a stay running forward from a mast to the deck, the bowsprit or to another mast....

set on a stay running forward and downwards from the top or midpoint of the topgallant mast is called a topgallant staysail.