Contraction for Empty Repositioning. The movement of empty containers.

An order to stop; as, "Avast heaving!"

Opposite of absorption or adsorption. In filtration, it relates to the downstream release of particles previously retained by the filter.

A floating log

Sailing upwind so close to the wind that the forward edge of the sail is stalling or luffing, reducing the power generated by the sail and the angle of heel. Also known as pinching.

A single block such as a snatch block used as a fairlead to bring a line in a more favorable direction.

Order given to a boat's crew when going alongside under oars. Denotes that boat has sufficient way, and that oars are to be placed inside the boat.

A compressor belonging to the group of displacement reciprocating compressors.

Small boat similar to and including jetskis

A plot of expected operating characteristics (e.g.., discharge pressure versus inlet capacity, shaft horsepower versus inlet capacity).

Machines in which air or gas is compressed by the mechanical action of rotating vanes or impellers imparting velocity and pressure to the flowing medium. (Raise the pressure of the air by converting the energy from the velocity of the air to pressure.)

To receive goods from a foreign country.

The official who is in charge of a harbor, enforcing all its applicable regulations.

A wind moving from the land to the water due to temperature changes in the evening, where the temperature of the land falls below the sea temperature.

An expression describing a sailing ship set with every sail she can carry.

Method of payment for goods in which documents transferring title are given the buyer upon payment of cash to an intermediary acting for the seller, usually a commission house.

The line to which a vessel is submerged with a full cargo on board.

The highest operating pressure the system or component is designed to withstand.

A knot used to tie two lines together.

Person given a passage in one of H.M. ships; usually on compassionate grounds.