Abstract: An improvement on U.S. Pat. Nos. 3,789,790 and 3,749,043 employs spool sections which are notched so that they are spliced together over the jib stay rather than having pins in two of the grooves in the sections to join the same end-to-end, thereby freeing two grooves and enabling a second sail and its halyard to be installed. Thus twin jibs may be supported and also furled. The sail is attached to the furling spool by securing slug slides at intervals along the luff of the sail to fit into one groove of the spool. The top of the sail is fixed to a wire rope halyard which runs over a pulley in a crown block fixed to the upper end of the uppermost spool section, then down a groove in the spool. The lower end of the halyard is fixed to a traveler having an apertured ear which extends outside the spool. Several means for tightening the halyard by applying a pull on the ear and several ways of securing the ear in place once it is tightened are disclosed.