It is a fore and aft rig, where the mainsail is controlled by brails. Throat brails are fitted, and used when gybing. The brails would be placed in the correct positions, and wingnuts fitted. Brails from a Miller Dunn are difficult to fit on another maker's helmet. The command is, "hale up the brails", or, "brail up the sails". On a ship rig, these brails are most often found on the mizzen sail.