When reciprocating compressors run, the moving parts such as pistons, rods, crossheads, connecting rods are repeatedly accelerated and retarded. These velocity changes set up pulsating inertia forces. The forces are of the first and second order. The firs ...

Used to denote movements of cargo containers interchangeably between transport modes, i.e., motor, water, and air carriers, and where the equipment is compatible within the multiple systems.

Confined to an anchorage or haven through being unable to proceed because of stormy weather.

A draft to which no documents are attached.

Logistics Over The Shore.

In the middle portion of the boat - Roughly halfway between a ship's stem and stern, and where the beam usually is the widest.

An individual with specific knowledge of a harbor, canal, river or other waterway, qualified to guide vessels through the region. Some areas require that boats and ships be piloted by a licensed pilot.

During the operation of tacking, the moment when a sailing vessel is head to the wind and hanging there, with her head not paying off on the opposite tack. Such a vessel is said to be "in stays" or "in irons".

A steamship. A ship propelled by a steam engine.

A white light, usually on the masthead, visible from all directions, used to indicate that a vessel is anchored.

A keel that runs the length of the boat.

The after rail at the stern of a ship. Also called a Pushpit

Shell or body of a ship.

A multihull with two hulls separated by a deck or crossbeams from which a trampoline is suspended; abbreviated "cat."

Insoluble material suspended in the lubricating oil. This material may come from contamination or oil degradation.

A round wood plug inserted in a hole to cover a nail, screw, or bolt.

An adjustable section of the rudder that allows the rudder to be corrected for lee helm or weather helm.

A two-masted vessel with both masts square rigged. On the sternmost mast, the main mast, there is also a gaff sail

A rotating device, with two or more blades, that acts as a screw in propelling a vessel. Sometimes called a screw.

A knot used to form a knob in the end of a line to prevent the end from running through a block or other narrow space.