Tools that operate by air pressure.

(1) Clear, not tangled. (2) sailing free: a vessel is sailing free when her sheets are eased. (3) running free: to sail with the wind from astern.

A thick serge jacket worn by seamen while keeping watch at night or in stormy weather.

The slight deflection of very small particles in a gas stream that occurs when rapidly moving gas molecules strike them.

Damage Free Car. Boxcars equipped with special bracing material.

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

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.

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.

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

To touch bottom.

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

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.

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 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, ...

To cause a break in the hull which may sink the vessel; the vessel is then called stove.

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

(1) To stop moving. (2) Usually air travels smoothly along both sides of a sail, but if the sail is not properly trimmed, the air can leave one of the sides of the sail and begin to stall. Stalled sails are not operating efficiently.

On a square-rigged ship, the act of lowering a spar or yard to the deck.