A valve designed to prevent air volume and pressure from escaping the compressor tank back into compressor heads while compressor is not operating.

That geographical belt located approximately in 40 degrees south latitude in which are encountered the prevailing or stormy westerlies.

A preparatory order (wait

GMT for short. Greenwich Meridian Time, also known as Universal Time or Zulu time. A time standard that is not affected by time zones or seasons. It is the time used by navigators in celestial navigation.

A figure marked on the side of merchant vessels to indicate allowed loading depths. Named after Samuel Plimsoll, English Member of Parliament and maritime reformer.

Removal of a shipment from a vessel.

A form used to acknowledge receipt of cargo and often serves as basis for preparation of the ocean bill of lading.

Said of the anchor chain when moored and the chain does not lead clear of another chain.

In water transportation, the deliberate sacrifice of cargo to make the vessel safe for the remaining cargo. Those sharing in the spared cargo proportionately cover the loss.

A solid adsorbent used for drying compressed air.

A design in which the forestay runs to the top of the mast.

Placed at right angles to the keel, such as a transverse frame, transverse bulkhead, etc.

Term used in a voyage charter party, e.g. vessel shall proceed to Berth 2 at Falmouth.

A call to turn out of bunks.

To trim the sheets in.

In lore, the flag flown by a pirate ship - a white skull on a black background with crossed bones below the skull - although there is no evidence that such a flag was ever flown.

Metal fitting attached to the hull that supports and aligns the aft portion of the propeller shaft.

Allows foreign merchandise arriving at one port to be transported in bond through the U.S. to be exported from another port, without paying duty.

A line leading forward from the end of a mainsail boom to prevent the boom from swinging inboard while broad reaching or running. also Preventer

An indication on a draft that the documents attached are to be released to the drawee only on payment.