At right angles to the centerline of the boat; rowboat seats are generally athwart ships.

A device for mounting cylinders.

A topsail on the main mast.

Usually refers to intracity hauling on drays or trucks.

Sundays, holidays excluded

Method of producing a chart in which the parallels of latitude and the meridians of longitude intersect each other at right angles.

The area (in sq inches) of the filter element that is exposed to the flow of air or fluid for effective filtering.

Man or boy employed in sailing deep-water craft. Word is sometimes loosely used to include men who go to sea. Used officially to denote a seaman serving on deck.

A pressure-volume diagram for a compressor or engine cylinder produced by direct measurement made by the use of a device called an indicator.

Filter rating indicating the approximate particle size for which the majority will not pass through a given filter. It is generally interpreted as meaning that 85% of the particles of size equal to the nominal filter rating will be retained by the filter.

The art and science of designing vessels.

Heat cannot, of itself, pass from a colder to a hotter body.

A unit used when measuring atmospheric pressure. 33.86 millibars.

A rail surrounding the poop deck.

A frame used to support the boom when the sail is down.

A fluid (as hydrogen or air) that tends to expand indefinitely. Is one of three basic phases of matter.

Canvas, wood or rope used over the side to protect a vessel from chafing when alongside another vessel or a dock.

Is the ratio of weight of vapor existing in a given space to the weight that would be present if the space were saturated at the space temperature.

U.S. Commerce Department document, "Shipper's Export Declaration."

Method of settling disputes which is usually binding on parties. A clause usually in a charter party.