The top point of the line about which the earth rotates.

A means of purifying an air stream by using both gravitational and centrifugal forces.

The U.S. government does not issue certificates of free sale. However, the Food and Drug Administration, Silver Spring, Maryland, will issue, upon request, a letter of comment to the U.S. manufacturers whose products are subject to the Federal Food, Drug ...

The swiveled opening at the top of a ventilator.

A large foresail which extends aft behind the mast.

Said of a vessel when she is shipping water on deck and it is running off through scuppers and freeing ports.

The number of degrees of list a vessel has. The first indication that a vessel may need to reef is when there is too great an angle of heel.

(1) A nautical instrument, on the arc of which is a finely graduated scale showing degrees and minutes, with adjustable reflectors, etc.; used to find the altitude of heavenly bodies, angular distances, etc. (2) On a steering gear, the rudder quadrant is ...

A charge made for lifting articles too heavy to be lifted by a ship's normal tackle.

To heave in until the vessel is riding nearly over her anchor.

Sailors' term for an old ship that needed a lot of paint and repairs.

Seaman's term for the period of work on board ship for which he has been paid in advance when signing on.

Machines cooled by water circulated through jackets surrounding the cylinders or casings.

A prisoner sold in the slave market. He was forced to serve in the war galleys, where he pulled on one of the oars.

Owners or operators of vessels providing transportation to shippers. The term is also used to refer to the vessels.

When the wind pushes on the wrong side of the sail, causing it to be pushed away from the wind. If the lines holding the sail in place are not released, the boat could become hard to control and heel excessively.

The fitting which connects the boom to the mast.

A short piece of rope secured in the bow of a small boat used for making her fast.

A cleat designed to hold a line in place without slipping. It consists of two narrowing jaws with teeth in which the line is placed.

Cotton yarn used for cleaning purposes.