MAYDAY
A radio distress call, from the french m’aidez
(help me); SOS in Morse Code.
Mooring
Commonly, the anchor chain, buoy, pennant,
etc., by which a boat is permanently anchored
in one location.
Motor
A source of mechanical power.
Motorboat
Any watercraft 65 feet or less in length pro-
pelled by machinery, whether or not such
machinery is the principal source of propul-
sion.
Navigation
The art of conducting a ship from port to port.
NauticalMile
6076.12 feet, or 1852 meters, an international
standard; the geographical mile, the length of
one minute of latitude at the equator, is
6087.20 feet.
NunBuoy
A conical, red buoy bearing an even number
and marking the starboard side of a channel
from seaward.
Oar
A long, wooden instrument with a flat blade at
one end, used for propelling a boat.
Outboard
(1) a propulsion unit for boats, attached at the
transom; includes motor, driveshaft, and pro-
peller; fuel tank and battery may be integral or
installed separately in the boat; (2) outside or
away from a vessel’s hull; opposite of
inboard.
Outdrive
A propulsion system for boats, with an
inboard motor operating an exterior drive,
with driveshaft, gears, and propeller; also
called stern-drive and inboard/outboard.
OverallLength
The extreme length of a vessel, excluding
spars or rigging fittings. See LOA.
Painter
A rope attached to the bow of a boat for mak-
ing it fast.
PFD
Personal Flotation Device.
Pier
A structure, usually wood or masonry, extend-
ing into the water, used as a landing place for
boats and ships.
Pile
A vertical wooden or concrete pole, driven
into the bottom; may be a support for a pier or
floats; also used for mooring.
Piling
A structure of piles.
Pitch
(1) The up and down movement as the bow
and stern rise and fall due to wave action; (2)
The theoretical distance advanced by a pro-
peller in one revolution.
PlaningHull
Type of hull that is shaped to lift out of the
water at high speed and ride on the surface.
Port
The left side of a boat when you are facing
the bow, also a destination or harbor.
PrivilegedVessel
Former term for the vessel with the right-of-
way.
Propeller
Wheel or screw. Mechanism that pushes
water aft to propel the boat.
Rigging
The general term for all lines (ropes) of a ves-
sel.
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