water ballast


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water ballast

[′wȯd·ər ‚bal·əst]
(naval architecture)
Water confined to double-bottom tanks, peak tanks, or other designated compartments, for use in obtaining satisfactory draft, trim, or stability.
References in periodicals archive ?
"Since there was a loud noise, there may be a chance that gas got consolidated in the water ballast since welding is done using two different gases.
In addition, for lane closures, the merging taper can use water ballast channelizing barricades, with the barrier placed beyond the transition area.
IMO (International Maritime Organization) requires the use of a PSPC certified coating for water ballast tanks.
Each crane weighs hundreds of tonnes, 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.
In the marine environment, and particularly in sea water ballast tanks, corrosion control can be challenging due to the harsh conditions to which the metals are subjected.
"Obviously having the water ballast on the wrong side can be quite dangerous - which happened now and again but we diligently pumped it back to where it belonged.
Earlier this year, Alinghi, owned by biotech tycoon Ernesto Bertarelli, broke with America's Cup tradition by launching a 90-foot catamaran with an engine to trim its gigantic sails and move water ballast from one hull to another.
To salvage the ferry, water ballast will first be pumped into the vessel until it is in an upright position.
The Water Barrier Manufacturers Association is the premier national association representing plastic water ballast device manufacturers.
Firefighters from the city's Pilgrim Street Station used winches to pull the scaffolding back into place and hose reels to fill a water ballast to weigh the tower back down.
``Additional fresh water ballast has been added to the double bottom to bring the section to an even keel trim.
Traditional FPSOs can incur significant cost and complexity in construction through the need for a turret system to handle moorings and flowlines.The DDPSOs symmetrical hull uses an oil-over-water philosophy to store stabilised crude product following processing, and as a result requires only a minimal water ballast system.