Notes: Based on an IOR 1/2 ton prototype.\nA more racing oriented version (with a shorter coach roof and longer cockpit, deeper keel etc.) was also available. How many of these were built in unknown. \nAvailable with the deeper keel: 6.0'/1.83m\nTall rig:\nI: 39.5'/12.04m\nJ: 12.5'/3.81m\nP: 35.0'/10.67m\nE: 9.5'/2.90m\nThanks to SJ 30 owner Chris F. for providing additional information.