The title of a commander of a fleet or a subdivision of it.

On the deck (not over it - see ALOFT)

Moves anchors and tow drilling vessels, lighters and similar.

In the direction of the vessel's head. Wind ahead is from the direction toward which the vessel's head points. In a forward direction.

To push a sail out so that the wind fills the opposite side, thus slowing the boat down.

A colorless gaseous compound of nitrogen and hydrogen used in refrigeration and in making of fertilizers and explosives. Found in some ambient air conditions.

The forwarding agreement or carrying agreement between shipper and air carrier and is issued only in nonnegotiable form.

An old maritime expression meaning "immediately", as "let go amain" (drop the anchor at once!).

That part of the ocean lying below 300 fathoms from the surface.

The angle a celestial body makes with the horizon.

A term of measure referring to 42 gallons of liquid at 60o F.

Placing a port on a vessel's itinerary because the volume of cargo offered at that port justifies the cost of routing the vessel.

A type of compression where no heat is transferred to or from the gas during the compression process.

All (not just 98%) particles larger than the stated micron size have been removed from the fluid being filtered.

The act if striking or collision of a moving vessel against a stationary object.

Device that permits passage between regions of differing air pressures, most often used for passage between atmospheric pressure and chambers in which the air is compressed. A typical modern air lock consists of a cylinder of steel plate with airtight doo ...

A member of the steward's department who served meals to officers and crew.

To remove the ballast from the a ship.

An act beyond human control, such as lightning, flood or earthquake. – An unpredictable situation which is beyond the power of man. A natural event, not preventable by any human power, such as flood, storms, or lighting usually quoted as “force majeure” ...

a filter medium primarily intended to hold soluble and insoluble contaminants on its surface by molecular adhesion.