block

The internal duct and filter medium support

The opening between the jib and the mainsail. Wind passing through this opening increases the pressure difference across the sides of the mainsail, helping to move the boat forward.

The operation of secretly bringing goods into a country to avoid paying duty on the goods. Also applies to illicit goods.

The rod connecting the disc to the lever on a valve.

A large balloon shaped lightweight sail used when running or reaching. Spinnakers are made of cloth very similar to that used for parachutes, which is why you may also hear them called chutes, or kites.

Large ships dating back to the 17th century typically with three masts carrying rectangular sails mounted on horizontal spars called yards. A sailing-ship rig with rectangular sails set approximately at right angles to the keel line from horizontal yards.

Air or vapor given off or expelled as a byproduct or result of an operation or treatment process.

The quantity of heat required to raise the temperature of a unit weight of a substance by one degree.

The ship's funnel or smokestack.

An articulated five-platform rail car that allows containers to be double stacked. A typical stack car holds ten 40-foot equivalent units (FEU's).

The mount and housing for the compass, usually located on the wheel's pedestal.

Same as two blocks.

In sailboat racing, to have a controlling position over competitors by staying between them and the next mark or buoy - a tactical maneuver in which the lead boat stays between the trailing boat and the wind or the next mark.

A raised portion of the hull forward of the cockpit intended to prevent water entering.

Along or around a coast.

To permanently join two pieces of rope. It will not pass through a block since it increases the diameter

Blowdown.

A boom on a jib or staysail.

A structure of heavy timbers placed between ground ways and cradle to support the ship during launching.