G&amp;S 30G&amp;S 30 G&S 30 The G&S 30 is an American sailboat that was designed by Graham & Schlageter as an International Offshore Rule Half Ton class racer and first built in 1979. Production. The design was built by a number of builders on a custom basis, including at least three built by Shea Marine. Design. The G&S 30 is a recreational keelboat, built predominantly of fiberglass and wood. It has a fractional sloop rig, a raked stem, a sharply reverse transom, an internally mounted spade-type/transom-hung rudder controlled by a tiller and a fixed fin keel. It displaces and has lead  ballast. The boat has a draft of with the standard keel. The boat may be fitted with an inboard engine or a small outboard motor for docking and maneuvering. The design has a hull speed of and PHRF racing average handicap of 144. Operational history. The boat is supported by an active class club that organizes racing events, the "Half Ton Class". G&S 30 The G&S 30 is an American sailboat that was designed by Graham & Schlageter as an International Offshore Rule Half Ton class racer and first built in 1979. Production. The design was built by a number of