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
Black Hands, White Sails: The Story of African-American Whalers Black Hands, White Sails: The Story of African-American Whalers Black Hands, White Sails: The Story of African-American Whalers is a 1999 book by Patricia McKissack and Frederick McKissack about the involvement of African-Americans in the history of whaling in the United States. "BookList", in its review of "Black Hands, White Sails", called it a "fascinating look at the convergent histories of whaling and the abolitionist movement" and concluded "Less-skilled readers may have difficulty following the expansive narrative that pulls in details from several different angles, but history buffs and researchers should find the book's complexity rewarding." and "Library Journal" found