On asquare riggedsailing vessel, atopgallant sail (topgallant alone pronounced "t'gallant", topgallant sail pronounced "t'garns'l",[1] is the square-rigged sail or sails immediately above thetopsail or topsails. It is also known as agallant orgarrant sail.
Laterfull-rigged ships split the topsail (and often the topgallant sail) for easier handling. They thus set 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 thetopgallant mast. If there is a lower topgallant it is set from midway down the topgallant mast. Astaysail set on a stay running forward and downwards from the top or midpoint of the topgallant mast is called atopgallant staysail.[2]