There is rec.boats and rec.boats.paddle, rec.boats.racing, and rec.boats.building. There is also alt.sport.jetski and rec.sports.waterski. You might also want to look at rec.woodworking. There are also some sailing-related WWW pages; pointers to some can apparently be found at http://pdsmacii.as.utexas.edu, and some laser-related stuff to be found at ftp://ftp.law.indiana.edu/pub/laser and a WWW site at http://www.law.indiana.edu/misc/laser.html; further online sources are listed below.