The S2 6.9, also marketed as the S2 6.9 Grand Slam, is an American trailerable sailboat that was designed by Don Wennersten and Graham & Schlageter as racer-cruiser and first built in 1983.
S2 Yachts engaged Graham & Schlageter to make changes to the cockpit, cabin, sailplan and the keel, however the result was a boat that was no faster than the 6.7.
It has a fractional sloop rig, a raked stem, a plumb transom, a transom-hung rudder controlled by a tiller and a lifting keel operated via a winch from the cockpit.
[1][3] The boat has a draft of 4.50 ft (1.37 m) with the lifting keel extended and 10 in (25 cm) with it retracted, allowing operation in shallow water, beaching or ground transportation on a trailer.
[3] In a 2010 review Steve Henkel wrote, "best features: The ten-inch draft and smooth bottom with keel up makes her easy to launch and retrieve to a trailer, Worst features: The lifting keel takes a winch to lift its 430 pounds straight up.