The typical winds for a particular region and time of year.

A floatation device shaped like a U and thrown to people in the water in emergencies.

To double a vessel's mooring lines.

Practices and measures that increase energy efficiency.

The soft sandstone block sailors use to scrub the deck, so-called, because seamen were on their knees to use it.

See standard air.

A safety device used to prevent or stop unwanted flames.

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.

Of, relating to, or using air. Moved by air pressure. Filled with compressed air.

Devices that may be used to position the impeller or to protect the shaft.

Fitted with drilling rig (oil derrick with rotary drill and a mud pumping system), drilling for petroleum.

Swing of the boom from one side of the ship to the other when the tack is changed.

Sailor's slang for anchor.

A port designated by the government of a country for duty-free entry of any non-prohibited goods. Merchandise may be stored, displayed, used for manufacturing, etc., within the zone and re-exported without duties.

The horsepower calculated from compressor-indicator diagrams. Applied only to displacement type compressors.

The gauge pressure at which a safety valve visibly and audibly opens or at setting which a relief valve discharges an unbroken stream of liquid.

The borrowing of money by the master using his ship as security.

To touch bottom.

A vessel formed of two or more hulls. A catamaran has two hulls, and a trimaran has three hulls.

To sail too close to the wind so that the sails start to luff.