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A polar diagram, or polar plot, is a graph that shows a sailboat's potential speed over a range of wind speeds and relative wind angles. [1] It normally consists of the right side of a line chart with the radius representing the yacht speed and the angle representing the wind direction blowing from top to bottom. Several lines are normally ...
Fore-and-aft rigs comprise the vast majority of sailing vessels in use today, including effectively all dinghies and yachts. The sheet on a fore-and-aft sail controls the angle of the sail to the wind, and should be adjusted to keep the sail just filled. Most smaller boats use the Bermuda rig, which has two or three sets of sheets:
An extract from a case study in the application of Mark Room (Rule 18). The Racing Rules of Sailing (often abbreviated to RRS) govern the conduct of yacht racing, windsurfing, kitesurfing, model boat racing, dinghy racing and virtually any other form of racing around a course with more than one vessel while powered by the wind.
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The primary advantage of adjusting the cunningham is the speed and ease with which the luff tension can be changed while sailing or racing. By either hauling or easing the line, the tension in the luff can be changed, thereby shifting the point of maximum draft of the sail forward or aft respectively, optimizing sail shape and thus performance ...
Because a spinnaker has two clews, there is always a second line identical to the afterguy attached to the leeward clew of the spinnaker. This is called the sheet and serves a slightly different function. When the boat jibes, the spinnaker pole will be moved from one side of the boat to the other, causing the sheet to become the guy and vice versa.
Leech line with jam cleat to control the tension on the leach of a sail Modern sails may come with a standard leech line ( leech control ) that runs under the back edge of the mainsail . This line is usually fixed at the head of the sail, and the other end can be cleated near the clew of the sail.
"PT-109" is a 1962 song by Jimmy Dean about the combat service of John F. Kennedy and the crew of the PT-109 in World War II. The boat was famous even before Kennedy ran for office, because Kennedy and most of the crew had survived after it was rammed and cut in two by a Japanese destroyer.