What year were land sailing invented?

What are water wheels made of? What year is a wards Sea King outboard motor model no VWB19073A serial no 56XC13472? What is the requirement for coast guards assistance when a vessel is aground? What color is a mooring buoy? What is weight ofshorelander 18 foottandem boat trailer? What does a deep freeboard mean? What is the best outboard motor fuel? Which lights must be shown on a power driven vessel at night? Do you need a passport if you are going on a cruise to the Bahamas? Where can one find information about Carnaval Cruises? What must you do when operating a boat within 50 feet of a dock? How much can a barge carry? What type of boat situtation causes the most fatalities? Why are periscopes used? How many pairs of parallel lines in a hexagon? Will a 40 to 1 gas to oil mixture damage an engine that asks for a 50 to 1 ratio? Where did the CSS Hunley sink? What should you do when approaching a boat in darkness or reduced light? How can you get info on boat hull number? These are PFDs and most states require at least one of these to be on board vessels 16 feet in length and longer?