To stand at the mast and pull down on a halyard as another crewmate winches it in.

Those frames of a ship's hull which are equal in area, one forward and one aft of the ship's center of gravity.

Direct current. A continuous, one directional flow of electricity

Bulk Carrier or Motorcar Carrier

A rope spliced into the end of a block and used for making it fast to rigging or spars. Such a block is called a tail-block.

Said of a lighthouse not tended.

A depth measuring device.

Navigation and Inspection Circular (US Coast Guard)

A container frame fitted to accommodate two or more separate tanks for liquids.

A fix taken by visually observing the location of known landmarks.

A line led to a sail, but is not currently in use. The line currently in use is known as the working sheet. Usually the working and lazy sheets change when the boat is tacked.

An abbreviation of forecastle.

Sling of various types used for lifting vehicles on to and off general cargo ship.s

A rope used for securing any movable object in place

Slang for getting married. A splice joins two lines together permanently.

Is the ratio of the computed isentropic temperature rise to the measured total temperature rise during compression.

A sailing ship with three to five masts, all of them square-rigged except the after mast, which is fore-and-aft rigged.

A term used to describe the hot gas pressure on the outlet side of the refrigeration compression.

To go aboard the vessel; to put onboard a vessel.

Circular iron band used to hold a bowsprit on the stem of a sailing vessel.