A symmetrical spinnaker is a type of sail used primarily for downwind sailing. It has a shape that allows it to catch the wind from behind the boat, providing maximum propulsion. This sail is typically larger than other sails and is designed to be flown from a pole, which helps maintain its shape and efficiency. The symmetrical spinnaker is often used in racing and cruising because of its ability to harness wind power effectively. Sailors can adjust the angle of the sail to optimize performance, making it a versatile choice for various wind conditions. Proper handling and trimming are essential for achieving the best results with a symmetrical spinnaker.