deballastv.
/diːˈbaləst/ transitive. To remove ballast from (esp. an oil-rig platform or barge).
ΘΚΠ
society > travel > travel by water > other nautical operations > [verb (transitive)] > supply with ballast > remove ballast from
unbalance1586
unballast1769
deballast1962
1962 Oil & Gas Jrnl. 20 Aug. 78/1 In this control room, one man can ballast and deballast the barge to offset changing loads.
1975 Lamp (Exxon Corp.) Winter 18/2 From a sheep pasture, the platform is seen deballasted and ready for towing, with Stavanger harbor and town in the background.
1976 Offshore Platforms & Pipelining 51/1 Deballast the temporary launching barge until the end of the buoyant tower floats.
1982 Sci. Amer. Apr. 38/1 After mating, the hull and topside assembly is towed to the installation site, submerged to allow its tethers to be connected to preset foundations and deballasted to tension the tethers.
Derivatives
deˈballasting n.
ΘΚΠ
society > travel > travel by water > other nautical operations > [noun] > ballasting or deballasting
unballastinga1684
ballasting1769
deballasting1965
1965 Economist 16 Jan. 221/2 The deballasting system which might have been adequate for a conventional submarine.
1976 Offshore Engineer Apr. 9/3 Barge deballasting was scheduled to start so that they rose to make contact just before high tide on Monday, 5 April.
1980 Jrnl. Royal Soc. Arts July 526/1 De-ballasting lines and ballast treatment plant would be very expensive to instal [sic] and operate.
This entry has not yet been fully updated (first published 1989; most recently modified version published online September 2018).
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v.1962