Boats and boating Maintenance and repair 18 Boatbuilding 12 Safety measures 12 Navigation 7 Design and construction 6 Seamanship 5 Motorboats 4 Boating accidents 3 Environmental aspects 3 Fiberglass boats 3 Periodicals 3 Boats, Prehistoric 2 Consumer education 2 Designs and plans 2 Distress signals 2 Electronic equipment 2 Equipment and supplies 2 Ground-effect machines 2 Hydrofoil boats 2 Marine meteorology 2 Painting 2 Recreational use 2 Rescue work 2 Ships 2 Standards 2 Weather forecasting 2 Wooden boats 2 Yachts 2 Aquatic sports 1