The 18 sq is a development class. NACRA made a Square, but as a whole the Squares were never actually made as production boats (read, we don't need no STEENKIN' class rules). You can get hullplans by Lindahl or any hull design for that matter. The only real limitations are 18' length (5.5m), 18 square meters of sail area (in any config you want), and the Category I squares are 330 lb or less, Cat II sq are 330 or greater. <br> <br>For the details, see the Square page <br>http://members.nbci.com/_XOOM/nacrasailor/18square.htm <br> <br>I love mine... <br>tami <br><br><br>
