In a square rigged ship, the act of hauling the head sheets to windward and laying the head-yards flat aback in order to bring the ships head out of the wind while tacking. This is done when helm action alone is insufficient.

(1) Said of seas that break over a vessel or over a sea wall. (2) A whale breaches when it leaps out of the water.

The large enclosed floor where the lines of a vessel are laid out and the molds or templates made.

Is any gas or gas mixture that contains no water vapor and/or in which all of the constituents are substantially above their respective saturated vapor pressures at the existing temperature.

A small channel or opening in a filter medium which allows passage of gas.

Wooden shoulders attached below the masthead to either side of a wooden mast which originally supported the trestle trees.

An expression of surprise or unbelief, as when a ship strikes a rock or shoal so hard that her timbers shiver.

A Marine insurance term to refer to partial loss on an individual shipment from one of the perils insured against, regardless of the balance of the cargo. Particularaverage insurance can usually be obtained, but the loss must be in excess of a certain per ...

is an ideal process that may be stopped and made to retrace its steps and restore to the systems or surroundings all work and heat previously removed. It is frictionless.

The rotating element of a machine and, in the case of a compressor, is composed of the impeller (impellers) and shaft, and may include shaft sleeves and a thrust balancing device.

An order to make haste.

Sailing term used to indicate a sailing vessel underway with no headsails set.

The ship that carries an admiral's flag.

(1) The land in general, but usually refers to that part adjacent to the water. (2) A timber used in damage control to brace bulkheads and decks. (3) One of the many wooden props by which the ribs or frames of a vessel are externally supported while build ...

A dynamic compressor. A machine in which air or gas is compressed by the mechanical action of rotating vanes or impellers imparting velocity and pressure to the air or gas. In a centrifugal compressor, flow is in a radial direction. Air enters the compres ...

A trailer or semi-trailer with no sides and with the floor of the unit close to the ground.

Removal of a shipment from a vessel.

Old expression for the engraving of the wind-rose on charts.

A bunk which runs under the cockpit

Is the energy a substance possesses by virtue of its motion or velocity. Used primarily in calculations for dynamic and ejector type compressors.