Vertical tubular steel posts; two of them are fastened to the rectangular base of a bollard.

A secondary supporting structural member: an angle, T-bar, channel, built-up section, etc. used to stiffen plating of a bulkhead, a deck, etc.

A person or firm employed to load and unload vessels.

The inboard end of a ship anchoring cable which is secured in the chain locker by the clench pin.

Essentially biofuels, both bioethanol and biodiesel, are derivate of vegetable oils and animal fats. In Europe, rapeseed oil methyl ester (RME) is the common feedstock. In the United States the most common biofuel...

In principle, the sterntube aft seals can function without a lubrication system. However, the aft sealing functions better and has a longer life if it is fitted, like the forward sealing, with a lubrication system.

A general term for substances that counter foul actively. Biocides can have very different levels of toxicity and their environmental impact can vary from nothing to significant.

A resin or other cement-like material used to hold particles together and provide mechanical strength or to ensure uniform consistency, solidification, or adhesion to a surface coating; typical binders are resin, glue, gum, and casein.

Bimetallic joints between steel and aluminium are increasingly made with transition bars. These are explosively bonded laminates of steel and aluminium with pure aluminium at the interface, the production of which is itself a welding process.

Receipt for payment of the ship purchase price, delivered by the seller to the buyer on completion of the contract.

Document issued on behalf of the carrier describing the kind and quantity of goods being shipped, the shipper, the consignee, the ports of loading and discharge and the carrying vessel.

A sump to which bilge water drains. It is important to arrange bilge wells in the way enabling permanent access and possibility of cleaning even when holds are loaded.

see Oily water separator.

Current MARPOL legislation stipulates that separated bilge water containing 15 ppm or below in water can be disposed into international waters. Some national, regional and local authorities have more stringent regulations

The water that collects in the bilges of a vessel which generally becomes foul and noxious. Bilge water also contains fluids from machinery spaces, internal drainage systems, sludge tanks and various other sources.

All elements of the bilge system are to be tested to demonstrate satisfactory pumping operation, including emergency suctions and all controls.

A piping system intended for disposing of water that may accumulate in spaces within the vessel (holds, machinery spaces, cofferdams) due to condensation, leakage, washing, fire fighting, etc.

Drain pipes placed on each side at the after end of the holds or compartments. The suction end is fitted with a strainer or mud box.

The strake at the turn of bilge extending outward to a point where the side rises vertically.

The radius of the plating joining the side shell to the bottom shell. It is measured at midships.