A guy who gets Head (toilet) cleaning detail.

Opposite of absorption or adsorption. In filtration, it relates to the downstream release of particles previously retained by the filter.

To fill the seams of a vessel with pitch.

The temperature which would be measured at the stagnation point if a gas stream were stopped, with adiabatic compression from the flow condition to the stagnation pressure.

A topsail on the main mast.

Sundays, holidays excluded

A device for mounting cylinders.

Man employed in unloading ships in harbour, or in taking a ship from one port to another. Paid "lump" sum for services.

Completely filled with water.

National Fluid Power Association.

A board with cleats, forming a bridge reaching from a gangway of a vessel to the wharf.

The lines that lead from the clew of the jib to the cockpit and are used to control the jib.

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.

A notification by carrier of ship's arrival to the consignee, the "Notify Party," and - when applicable - the "Also Notify Party." These parties in interest are listed in blocks 3, 4 and 10, respectively, of the Bill of Lading.

A rail surrounding the poop deck.

Get gear in condition for use; to separate the blocks of a tackle to lengthen the fall (ready for use again).

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

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

Capable of going to sea.