Debris ejected from a ship that sinks or washes ashore.(flotsam)

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Debris or cargo that remains afloat after a shipwreck.


Debris that has sunk to the seabed.


A well-developed dust whirl, a small but vigorous whirlwind, usually of short duration, rendered visible by dust, sand, and debris picked up from the ground. Diameters of dust devils range from about 10 feet to greater than 100 feet; their average height is about 600 feet, but a few have been observed as high as several thousand feet. They have been observed to rotate anticyclonically as well as cyclonically. Dust devils are best developed on a hot, calm after- noon with clear skies, in a dry region when intense surface heating causes a very steep lapse rate of temperature in the lower few hundred feet of the atmosphere.


A flat expanse of dead reef rock which is partly or entirely dry at low tide. Shallow pools, potholes, gullies, and patches of coral debris and sand are features of the reef flat.


1. One of the timber and steel structures supporting the fore and aft ends of a ship for launching from sliding ways. 2. A spring-loaded ball engaging a notch; a ball latch.


A device used aboard ship to bring up large samples of deposits and sediments from the ocean bottom.


Full-size lines of a ship or airplane which are laid out in a mold loft.


The ability of a ship or aircraft to recover a horizontal position after a vertical motion of its ends about a horizontal axis perpendicular to the centerline.


The act or process of floating a ship after only hull construction is completed; in some cases ships are not launched until after all construction is completed.


The spar projecting from stern of ship

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