A document required and issued by some national governments authorizing the importation of goods.

Said of a vessel when unable to maneuver.

The ability of a filter to remove specified test contaminants under specified test conditions from a specific test fluid, air, gas or liquid. Expressed as a percentage of the quantity of test contaminant introduced into the inlet of the filter test system

Name given to the metal point or ram fixed on the bows of old war galleys and used to pierce the hulls, and thus sink or disable enemy ships.

A halyard used to raise the spinnaker.

An arrangement whereby a steamship company, under rules and regulations established in the freight tariff of a given trade, accepts small packages at rates below the minimum bill of lading, and issues a parcel receipt instead of a bill of lading.

Components subordinate to the compressor.

Old and experienced seaman.

Error that can be introduced when not reading an instrument, such as a compass, directly from its front, due to the separation of the indicator and the scale being read.

Inlet and outlet connections are located at the same level on opposite sides of the filter or other device installed on the pipeline.

40 cubic feet.

A traditionally shaped anchor having flukes perpendicular to the stock of the anchor and connected by a shank. These are less common than modern anchors such as the plow and lightweight anchors.

Any small collar made with spunyarn or light line to hold something in place.

a type of separator for removal of larger particles from an exhaust gas stream. Gas laden with particulates enters the cyclone and is directed to flow in a spiral causing the entrained particulates to fall out and collect at the bottom. The gas exits near ...

To pass a turn around a belaying pin or cleat.

One who designs ships.

The depth of the boat below the waterline; the amount of vertical distance from a boats water line to the bottom of it's keel.(2) The depth of water necessary to float a vessel(3) The belly or chord depth of the sail, its fullness

An order given to take hold of a rope and pull.

The point at which the Sun , traveling in the Ecliptic , crosses the Equinoctial when going from South to North declination.

A unit of work, being the work done in one hour at the rate of 1,000 watts.