Shipping companies operating a service in common between designated areas. Conference partners agree on special freight rates and terms for the trade in order to stabilize market and service.

A gun or rocket device which can project a light line between vessels.

Cutter blades mounted on the propeller to sever fishing lines, drift nets or discarded tow lines and hawsers.

A small hole cut in a plate near the bottom of the frame or other structural member to permit the passage of water or oil.

A procedure which involves auditing all items which are to be added, deducted or relocated on the ship at the time of the inclining test so that the observed condition of the ship can be adjusted to the lightship condition.

Red vessels on some hidden rock, reef or sand, and by night exposing characteristic lights. Their object is to mark outstanding dangers or port approaches.

Estimation of lightship mass is one of the most important tasks when a new ship is designed. In the preliminary design stage, the lightweight can be derived from the masses of a parent ship.

The mass of the ship in metric tons without cargo, fuel, lubricating oil, ballast water, fresh water and feed water in tanks, consumable stores, passengers and crew and their belongings.

The mean draught of an empty vessel.

The lightship is a ship complete in all respects, but without consumables, stores, cargo, crew, passengers and their belongings and without any liquids on board except for machinery and piping fluids, such as lubricants and hydraulics.

The lighting of crew spaces should facilitate visual task performance and facilitate the movement of crew members in the space and aid in the creation of an appropriate visual environment.

Solid towers which, in the day time, serve as landmarks, and by night exhibit strong lights. These lights vary, so that navigators may recognise the coast they are approaching.

The loading condition with the ship on even keel, without cargo, with 10% stores and fuel remaining and in the case of a passenger ship with the full number of passengers and crew and their luggage.

Carriage of goods by lighter and the charge assessed therefrom.

A small barge for carrying cargo between ship and shore.

The process of transferring cargo from a tanker to another ship. Also discharging a part of cargo into a lighter to reduce the vessel draft so it can then get alongside a pier.

A hole cut in any member to reduce weight.

A long steel beam usually constructed in “H” section or similar weight bearing construction employed to spread the load when lifting long or awkwardly shaped loads.

A hatch cover lifted bodily off the coaming by a ship or shore crane to provide access to the hold.

A hatch cover which is lifted by hydraulic jacks, or wheel lifts, and then can roll freely to a desired position.