A timber or rib of a ship running from the keel to the side rail; the transverse strengthening members in a ship's hull that extend from the keel to the deck or gunwale. The frames form the shape of the hull and act as a skeleton on which the hull plankin ...

Fixed ports that do not open which are placed in the deck or cabin to admit light.

The ability of a fluid that is insoluble in water to separate from water with which it may be mixed in the form of an emulsion.

(1) Old nickname for a sailor, who would treat his canvas coats and hats with tar as a protection against the weather. (2) The distilled residue of gum extracted from pine trees, used for preserving many things.

Abbreviation for "Not Elsewhere Specified."

A metallic structure on which a compressor or other machine is mounted.

A metal air-tight tank built into a boat to insure flotation even when the boat is swamped.

An industry abbreviation for "Hazardous Material."

Cargo thrown overboard in order to lighten the ship and washed ashore.

In the days of tall ships the barometer was a glass vessel with a thin stem. The fluid in the glass (in most cases water) would move up and down the stem as the pressure of the surrounding atmosphere changed. These movements were used to predict changes i ...

A compressor cooled by atmospheric air circulated around the cylinders or casing.

Is a measure of the rate of change of viscosity with temperature. Oils with high VI have low viscosity changes.

A cargo on which the transportation charge is assessed on the basis of weight.

The principal sail that is set on the main mast.

The behavior of perfect gases, or mixtures thereof, follows a set of laws. Boyle' law, Charle's law, Amonton's law, Dalton's law, Amagat's law, Avogadro's law, Poisson's law.

A device for furnishing fresh air to compartments below deck or exhausting foul air. Construction designed to lead air below decks. May have a cowl, which can be angled into or away from the wind; and may be constructed with baffles, so that water is not ...

An electrical depth sounder or fish finder that uses sound echoes to locate the depth of objects in water. It does so by timing the sound pulses.

Also VMG. Actual boat speed after adjusting for such factors as current and leeway.

A method of docking with a boat's stern to the dock.

A day for general ship cleaning.