The Tig Rig (TR) sail system is a way to retrofit sails to the world’s existing flat decked merchant ships, tankers and bulk carriers and some ferries. The TR is a two part system consisting of square rigged sails in self contained units which are mounted at fixed mounting points around the hull of the ship.
The mast and sails can be rotated through 360o and the sails reefed up and down in increments of 10ths of sail drop. The mounting points are interconnected by rails which allow the units to be drawn round the ship to sea side and out of the way of dockside operations in port. A similar but more involved procedure allows the units to be gathered at the stern and bow for transit through canals.
