The Supreme Court decision in Sprietsma v. Mercury Marine may require boat manufacturers to satisfy different safety standards for recreational vessels and associated equipment in all 50 states, rather than the one set of federal safety standards they currently meet. In the Sprietsma case, Mrs. Sprietsma accidentally fell overboard after the boat in which she was riding turned, and was struck by the propeller, suffering fatal injuries. Mr. Sprietsma claimed that the Mercury Marine outboard motor was unreasonably dangerous because it did not include a propeller guard. The Coast Guard has concluded that, to date, the evidence is unclear regarding the possible benefits and inherent dangers of propeller guards, and has not mandated propeller guards on recreational boats.