Water ballast

Also found in: Acronyms, Encyclopedia, Wikipedia.

Wa´ter bal´last

1.(Naut.) Water confined in specially constructed compartments in a vessel's hold, to serve as ballast.
Webster's Revised Unabridged Dictionary, published 1913 by G. & C. Merriam Co.
Mentioned in ?
References in periodicals archive ?
Nine workers were engaged in welding inside the water ballast when the blast occurred, killing five of them, while four were injured.
AE-monitoring indicated in an empty area of the water ballast tank active AEsources with amplitudes up to 65 [dB.sub.AE] approximately 1.5 m to 2.5 m below the sensor setup.
Hempel Quattro Photo IMO requires the use of a PSPC certified coating for water ballast tanks and this launch of a new range of pure epoxy coatings represents the latest state-of-the-art in pure epoxy technology which delivers optimized performance based on customer requirements.
The water ballast solves the "ballast problem" notwithstanding the environmental cost.
The vessel has under deck capacities of 1,287 c m of fuel, 800 c m of fresh water, 1,538 c m of water ballast, 497 c m of brine and 230 c m dry bulk tanks.Propulsion comes from four Cummins generators each rated at 1800kw, delivering a maximum speed of 14 knots.
His crafted tree will consist of a basic timber frame covered in a green canopy - and will be weighted down with heavy water ballast to stop it blowing over.
"Each crane weighs hundreds of tons, so the transport ship needs to be balanced by water ballast as the cranes are removed in order to keep its height above the water line constant.
The new vessels will incorporate a number of "green ship technology" features such as a fuel-efficient hull design, dual fuel engines, environmentally safe double-hull fuel tanks and fresh water ballast systems.
To aid his descent he cut some of the giant balloons away as well as ditching water ballast before landing in the village of Moeres at 9.05am.
It was the first yard in the world to produce an all-welded ship and the first to produce a vessel with a double bottom for water ballast. It was also the first shipyard in the world to produce rolled armour plates for warships.
"I have been changing course on the autopilot as the wind alters, and filling and emptying the water ballast tanks as the trim requires it.