A ship's signalling blast of from 4 to 6 seconds' duration.
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BAYAMO
A violent blast of wind, accompanied by vivid lightning, blowing from the land on the south coast of Cuba, especially near the Bight of Bayamo
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BLAST FURNACE GAS
Lean combustible by-product gas resulting from burning coke with a deficiency of air in a blast furnace.
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GENERAL EMERGENCY ALARM
A sound signal of seven short blasts and one long blast given with the vessel ́s sound system
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BLAST
A sound signal made with the whistle of the vessel
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NORTHER
A northerly wind. In the southern United States, especially in Texas (Texas norther) in the Gulf of Mexico, in the Gulf of Panama away from the coast, and in central America (the norte), the norther is a strong cold wind from the northeast to northwest. It occurs between November and April, freshening during the afternoon and decreasing at night. It is a cold air outbreak associated with the southward movement of a cold anticyclone. It is usually preceded by a warm and cloudy or rainy spell with southerly winds. The norther comes as a rushing blast and brings a sudden drop of temperature of as much as 25°F in 1 hour or 50°F in 3 hours in winter. The California norther is a strong, very dry, dusty, northerly wind which blows in late spring, summer and early fall in the valley of California or on the west coast when pressure is high over the mountains to the north. It lasts from 1 to 4 days. The dryness is due to adiabatic warming during descent. In summer it is very hot. The Portuguese norther is the beginning of the trade wind west of Portugal. The term is used for a strong north wind on the coast of Chile which blows occasionally in summer. In southeast Australia, a hot dry wind from the desert is called a norther.
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WILLIWAW
A sudden blast of wind descending from a mountainous coast to the sea, especially in the vicinity of either the Strait of Magellan or the Aleutian Islands.
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ABRASIVE BLASTING
The cleaning or finishing of surfaces by the use of an abrasive entrained in a blast of air.
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AIGUILLE
A slender form of drill used for boring or drilling a blast hole in rock.
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BARRICADE
Structure composed essentially of concrete, earth, metal, or wood, or any combination thereof, and so constructed as to reduce or confine the blast effect and fragmentation of an explosion.
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BEATER
1. A tool for packing in material to fill a blast hole containing a charge of powder. 2. A laborer who shovels or dumps asbestos fibers and sprays them with water in order to prepare them for the beating. 3. A machine that cuts or beats paper stock.
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