A dock line leading forward or aft, to prevent a vessel from moving ahead or astern. The after bow spring line is attached near the bow and runs aft, where it is attached to the dock. The forward quarter spring line is attached to the quarter of the boat, ...

The deck chest in which the bos'n keeps his deck gear.

A bow pivot line used in docking and undocking, or a dock line leading aft from the bow to prevent the boat from moving forward while made fast to a dock or pier.

A bridge that can be raised vertically to allow boats to pass underneath.

To touch bottom.

The upper deck rail along both sides of a vessel to prevent anyone on board from falling overboard.

Joining the ends of two lines without increasing the thickness over the length of the splice, so that the splice will pass freely through a block.

Sideward force created by a spinning propeller.

CFM. An airflow measurement of volume.

Damage Free Car. Boxcars equipped with special bracing material.

A breakwater used as a landing pier.

Steps in the compression of a gas, In reciprocating compressors, each stage usually requires a separate cylinder, in dynamic compressors, each requires a separate rotor disc.

The most important commercial measurement when the intrinsic weight of the cargo is so low that the ship becomes full without being loaded to the cargo line. Is expressed in cubic metres or cubic feet.

Is the total gas pressure (static plus velocity) at the discharge port of the compressor. Velocity pressure is considered only with dynamic compressors.

Articles which are taken apart to reduce the cubic footage displaced or to make a better shipping unit and are to be re-assembled.

Crew store managed by crew members offering everything from snacks to toiletries. Originally the name given to clothing that was issued to seamen.

A recess into the keel or a framework fixed to the keelson in which the mast is placed

The total pressure measured from absolute zero ( i.e., from an absolute vacuum).

The pressure measured in a flowing stream (liquid or gas) in such a manner that no effect on the measurement is produced by the velocity of the stream.

Small horizontal spars extending athwartships from one or more places along the mast. The shrouds cross the end of these "spreaders", enabling the shrouds to better support the mast.