A draft payable upon presentation to the drawee.

The difference in pressure between the opening pressure and reclose pressure of a valve. May be expressed in percentage of set pressure or "psig".

freezing of a piston ring in its groove in a piston engine or reciprocating compressor due to heavy deposits in the piston ring zone.

An anchor is said to bite when the flukes dig themselves into the ground and hold firm without dragging.

A load sufficient in size to fill a container either by cubic measurement or by weight.

Response to an offer which varies the terms or conditions of that offer.

Is the temperature at which oil begins to flow under prescribed conditions.

Running directly before wind and sea.

All matter consists of molecules which are in constant motion, but which are held together by molecular forces. In a solid the molecules are closely packed and arranged in such a pattern that the influence of the molecular forces is very strong. This give ...

Machines in which axial vanes slide radially in an eccentrically mounted rotor.

A wooden wedge fitting into a drainage hole in the bottom of a boat for the purpose of draining the boat when she is out of water.

Timber placed across the floor of the cargo hold to protect it from damage.

An able-bodied seamen entrusted with the steering of a vessel when entering or leaving a harbor. He is also involved with the use and upkeep of navigational equipment.

Path through open water used for commercial vessel passage and so noted on chart

Small birds that foretell bad weather and bad luck.

A 19th century term for a yachtsman who sails his own yacht without the help of a professional skipper.

Distinguishing flag of a merchant marine company flown from the mainmast of merchant ships.

A board that can be raised and lowered by pivoting in a watertight box called the trunk or well to increase the draft and lateral area of the hull, preventing the boat from sliding sideways. Unlike a daggerboard, which lifts vertically, a centerboard pivo ...

In sailboat racing, the mark or buoy that signifies one side of the starting line, opposite of the race committee boat.

Small marlinespike.