Travel by water can refer to a variety of activities, such as sailing, boating, and canoeing. The term 'SAIL' is often used to describe the act of propelling a boat or ship through the water using wind power. This is done by raising sails on a mast, which catches the wind and propels the vessel forward. Sailing is an ancient form of transportation that has been used for centuries to explore the world's oceans and waterways.