Rocks & mirror
WÄRTSILÄ
Encyclopedia of Marine and Energy Technology

B

329 results

Ballast movement

marine

A voyage or voyage leg made without any paying cargo in a vessel tanks. To maintain proper stability, trim, or draught, seawater is usually carried during such movements.

Ballast pumps

marine

Electric-driven pumps, usually vertically mounted and fitted with separate motor-driven priming systems. Close-coupled designs have the pump rotor mounted on an extended motor shaft.

Ballast system

marine

Piping and pumping system arranged so that water can be drawn from any ballast tank or the sea and discharged to any other ballast tank or the sea.

Ballast tank

marine

Watertight compartment for holding water ballast.

Ballast Water Discharge Requirements

marine

1. Ballast Water Convention, 2004 -The International Convention for the Control and Management of Ships’ Ballast Water and Sediments, 2004.

Ballast water exchange at sea

marine

The practical method to minimize the introduction of unwanted organisms from the discharge of ballast water. The exchange procedure shall be carried out in an “open ocean condition” at least 200 nautical miles...

Ballast water exchange standard D1

marine

Ships performing ballast water exchange shall do so with an efficiency of 95% of ballast water. For ships exchanging ballast water by the flow-through method...

Ballast water management

marine

Various measures to prevent, minimize and ultimately eliminate the risk of introduction of harmful marine organisms within ballast water. Ballast water management includes theballast water exchange...

Ballast Water Management Plan

marine

Ships of 400 gross tonnes and above are required to have on board and implement a Ballast Water Management Plan approved by Administration.

Ballast water performance standard D2

marine

Ships conducting ballast water management must discharge fewer than 10 viable organisms per cubic metre that are greater than or equal to 50 micrometers in minimum dimension...

Ballast water treatment

marine

Any method to kill, remove or render infertile, harmful or potentially harmful organisms within ballast water.

Ballast Water Treatment Systems (BWTS)

marine

Ballast Water Treatment System (BWTS) is a system designed to remove and destroy/inactive biological organisms (zooplankton, algae, bacteria) from ballast water.

Ballasting

marine

The procedure during which seawater ballast is introduced in specific tanks to achieve a desired stability, draught and trim.

Balljoint connection over the bow

marine

A special link between a floating pipeline and hopper dredger.

Baltic and International Maritime Council (BIMCO)

marine

A commercial shipping trade organisation headquartered in Copenhagen. BIMCO is one of the largest international organisations of ship owners in the world.

Bank side reservoir

energy

A contructed reservoir where water is pumped or siphoned from a river of variable quality or size.

Bar

marine

A unit of pressure equal to 100 000 Pascal (14.5 PSIG).

Bar (unit)

energy

The bar is a metric unit of pressure, but not part of the International System of Units (SI).

Bare boat charter

marine

A charter in which the bare ship is chartered without crew. The charterer for a stipulated sum takes over the vessel for a stated period of time, with a minimum of restrictions.

Bare hand

energy

Bare hand, or potential working, involves placing the worker in direct electrical contact with an energized overhead line.

Download the Encyclopedia