Required lights on a boat help others determine its course, position and what it is doing. Boats underway should have a red light visible from its port bow, a green light on the starboard bow and a white light at its stern. Other lights are required for v ...

Carry over of particles or contaminant from the filter or other filter materials into the clean side of the air flow.

An arbitrary filter efficiency rating.

An area of the North Atlantic east of the Bahamas where a powerful eddy in the water causes Sargasso weed to collect in vast quantities and float on the surface.

A through hull valve, a shut off on a plumbing or drain pipe between the vessel and the sea

Setting rate within a conference tariff that is different from the rate(s) for the same items established by other conference members.

A right claim against the guarantors of a loan or draft or bill of exchange.

Where the boat is pointed directly into the wind, sails luffing

Periodic publications containing details of any alterations to charts, to keep them up to date.

Any raised portion of a vessel/s hull above an upermost continuous deck such as a poop, bridge or forecastle and extending from side to side of the vessel.

Traditionally a ship's bell is made of brass and has her name engraved on it. It is used for striking the bells which mark the passage of time (see Bells) and is also used as a fog signal as an audible warning of a ship's position.

Lifts temporary quarantine of a vessel; granted pratique by Health Officer.

Is the ratio of actual capacity to piston displacement, stated as a percentage.

Describing a small or confined space. Originated from the time when a cat-o'-nine-tails was used to inflict punishment.

On ships, the stern and stem are marked in feet to show the draft or depth of the vessel.

A vessel which, according to the applicable Navigation Rule, has right-of-way. Also known as the "stand on" vessel.

Is the force in newton required to move a fluid layer of one square meter area and a thickness of one meter with a velocity of one meter per second.

One who is adept at splicing, knotting, and working with line and canvas.

The amount of air that a filter can handle. Expressed in CFM.

A situation in which waves strike a boat from the side, causing it to roll unpleasantly.