The Song Wren 21 extends the Wren series in several ways. She’s a bit larger than the Winter and Marsh Wrens, with room for up to three berths, and plenty of cabin space for all the amenities of cruising. She maintains the light and balanced feel of the smaller Wrens and adds the performance of a larger gaff rig and cutter sail arrangement. Although she can be built with a traditional keel, Sam has designed a swing keel that allows the exploration of shallower waters. Perhaps more importantly, the swing keel allows the boat to be trailered on a powerboat trailer, which means simpler storage and the means to take her to new and isolated waters – new adventures in a Song Wren.