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Marconi Rig
The most common type of sail used today, a triangle-shaped mainsail defined by the mast and one horizontal beam.
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Marlinspike
A tool for opening the strands of a rope while splicing.
MIDSHIP - Approximately in the location equally distant from the bow and stern.
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Mast
A spar set upright to support rigging and sails.
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Monohull
A boat with one hull.
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Mooring
An arrangement for securing a boat to a mooring buoy or a pier.
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Nautical Mile
One minute of latitude; approximately 6076 feet - about 1/8 longer than the statute mile of 5280 feet.
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Navigation
The art and science of conducting a boat safely from one point to another.
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Navigation Rules
The regulations governing the movement of vessels in relation to each other, generally called steering and sailing rules.
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Outboard
Toward or beyond the boat's sides. A detachable engine mounted on a boat's stern.
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Overboard
Over the side or out of the boat.
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Painter
A line attached to the bow of a boat for use in towing or making fast.
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Pay Out
To ease out a line, or let it run in a controlled manner.
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Pendant
The line by which a boat is connected to a mooring buoy; a short rope hanging from a spar having at its free end a spliced thimble or a block.
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Pennant
Any nautical flags that taper to a point and used for identification.
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Personal Flotation Device (PFD)
Official terminology for life jacket. When properly used a
PFD will support a person in the water. Available in several sizes and types.
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Pier
A loading platform extending at an angle from the shore.
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Pile
A wood, metal or concrete pole driven into the bottom. Craft may be made fast to a pile; it may be used to support a pier (see PILING) or a float.
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Piloting
Navigation by using visible references.
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Pitch
The alternating rise and fall of the bow of a vessel proceeding through waves; the theoretical distance advanced by a propeller in one revolution; tar and resin used for caulking between the planks of a wooden vessel.
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Piling
Support, protection for wharves, piers etc.; constructed of piles (see PILE).
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Piloting
Navigation by use of visible references, the depth of the water, etc.
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Pitchpole
To turn end over end in very rough seas.
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Planing
A boat is said to be planing when it is essentially moving over the top of the water rather than through the water.
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Planing Hull
A type of hull shaped to glide easily across the water at high speed.
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Port
The left side of a boat looking forward. A harbor.
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Priveleged Vessel
A vessel which, according to the applicable Navigation Rule, has right-of-way (this term has been superseded by the term "stand-on").
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Propeller
A rotating device, with two or more blades, that acts as a screw in propelling a vessel.
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