Forces on sails apart, which generally prevents heeling. Each sailing craft is a system that mobilizes wind force through its sails—supported by spars and rigging—which provide motive power and reactive force from the underbody of a sailboat—including the keel, centerboard, rudder or other underwater foils—or the running gear of an ice boat or land craft, which allows it to be kept on a course. Without the ability to mobilize reactive forces in directions different from the wind direction, a craft would simply be adrift before the wind. Accordingly, motive and heeling forces on sailing craft are either "components of" or "reactions to" the
Scarlet Sails (tradition) Scarlet Sails (tradition) The Scarlet Sails () is a celebration in St. Petersburg, Russia, the most massive and famous public event during the White Nights Festival every summer. The tradition is highly popular for its spectacular fireworks, numerous music concerts and a massive water show. More than one million people attended the Scarlet Sails show celebrating the end of the 2007 school year. In 2010 public attendance grew to 3 million, with entertainers including such stars as the Cirque du Soleil, Mariinsky Ballet and Antonio Banderas. This tradition began after World War II ended in 1945 - several Leningrad schools