found: LC database, July 16, 2008(usage: gaff rig, gaff rigged)
found: International Sailing Federation Web site, July 16, 2008:Australia Day Regatta page (Gaff riggers)
found: Isle of Wight Web site, July 16, 2008:Old Gaffers Festival page (gaff-rigged boats, gaff riggers, gaff rig)
found: Wikipedia, July 16, 2008:Gaff rig page (gaff rig is the most popular rig for schooner and barquentine mainsails; gaff-rigged sails were once common on the schooner, ketch, and yawl but have been largely replaced by Bermuda rigged sails; square rigged vessels have a gaff rigged spanker sail)