Sound Buoys: These are a special type of buoy equipped with a characteristic sound signal to aid in their location during periods of reduced visibility. Bell Buoys: These buoys are steel floats surmounted by a short tower in which a bell is mounted. The rolling of the waves makes the bell ring. Direction is the position of one point relative to another point without reference to the distance between them. Three types are True,Magnetic & Compass The Beaufort Scale is a type of measurement used by sailors to estimate the strength of the wind. A Fin Keel is a short deep keel fitted amidships in some sailing yachts that perform the same function as a dinghys' centerboard or dagger plate. Depth in nautical terms is measured in Fathoms. A fathom is equal to 6 feet or 1.83 meters. To moor a boat means to anchor a vessel with two anchors so that she lies between them; also to make fast the head and stern between two buoys. Boats with two or three parallel hulls are referred to as Multihull boats. Because of the wide overall beam, they are very stable boats. A vessel is said to be on a starboard tack when she is sailing with the wind on her starboard side. (Left) Seizing is the nautical term for binding together. For instance binding one rope to another. To tack in sailing means to go about (turn) by bringing the wind ahead and round on the other bow. The Lubber Line is the vertical mark on the inner surface of the compass bowl that is lined up with the vessels' bow. A severe squall or storm occurring along a cold front usually with thunderstorms, is referred to as a Line Squall. A fetch is the distance waves travel without interference. The longer the fetch, generally the higher the waves. Course: The intended direction of movement of the craft on a horizontal plane, generally measured in relation to the true or magnetic meridian. A Daymark is generally an unlighted beacon that serves as a daytime navigational mark. Kedge: A kedge is a small type of anchor, generally used with a line instead of a chain. Lead and Line: Is a leaded weight on a graduated line used for sounding the depth of the water when navigating in the shallows. The hull of the ship is referred to as the main body of the vessel, excluding the masts, rigging and equipment. In nautical terms, speed is measured in knots. A knot defined as one nautical mile per hour. A spinnaker is a large triangular sail carried by yachts as a headsail when running before the wind. The spinnaker allows the boat to travel with speed. A Wale is the extra protective thickness of wood bolted to the sides of a vessel to prevent her from getting damaged or scraped. In nautical terms the word Headway is referred to as the forward movement of a vessel through the water. Heave to or Lie to; refers to vessel that has trimmed her sails so that she remains virtually stationary in the water. Heading is referred to as the instantaneous direction of the fore and aft axis of a vessel, generally measured by the use of a compass. The word to Ghost in nautical terms means to make headway in the water by skillfully handling the sails in almost no wind. A Riding Light is a all-round white light hung in the fore part of a vessel to show she is at anchor. Sprung: Is the word used by sailors to refer to the mast when it has been damaged or cracked. The long oars used in sailing vessels when the wind has failed are called Sweeps. The extra canvas sewn along the edges of a sail to give it strength is referred to as the tabling. Windage: Is referred to the drag created by the parts of a vessel that are exposed to the wind. To Wear a ship means to put a vessel about (turn) on the other tack by bringing the wind around the stern instead of tacking. A vessel is said to be Wind-rode when she is at anchor and is lying at the command of the wind rather then the tide.