Booms


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Booms

 

(military; in Russian, bony), floating obstructions used to protect the moorage area of a fleet or the site of important structures (such as bridges and dams) from penetration by enemy ships and floating mines. For the passage of friendly vessels, booms have an adjustable part called boom gates. At entrances to sea harbors and ports, booms in the form of rows of logs are situated along the line or perpendicular to the line of obstructions; they are connected by chains or ropes and held down by anchors. On rivers an iron cable stretched from one bank to the other on floats is used. In order to block access to submarines, torpedoes and underwater mines, combined booms of logs with suspended nets are used. Obstructive booms of logs floating on the surface of the sea serve to ensure fire safety around the water area near warehouses of petroleum products. Booms used in logging, usually in the form of clusters of logs, are established in the riverbed to direct the lumber being floated.

References in periodicals archive ?
With a maximum working height of 21.81m, this new model is the latest addition to the expanding Genie Xtra Capacitiy (XC) boom lift range, said the manufacturer.
This boom has also been engineered to meet the overload restriction guidelines in the current European EN280 and Australian AS 1418.10 standards, as well as in the proposed Ansi A92 and CSA B354 industry standards in North America, said the statement from Terex.
did the simulation of a mobile pump boom motion process.
Vertical oscillations of the spray boom caused by irregularities on the terrain alter the distance between each nozzle and the target, and distort the distribution.
Labafa members found the containment booms last week.
This book is part of NASA's Aeronautics Book Series and covers development and flight testing of its Shaped Sonic Boom Demonstrator (SSBD).
* Greasable boom, a rugged, proven boom similar to the standard boom but features a grease cylinder to tension the digging chain.
In 1846, a magazine called the Scientific American published an article about puzzling booms in Deerfield, New Hampshire.
For policymaking, this means that reacting to asset price movements preemptively on the basis of the price movements alone is likely to cut off several fold the number of booms that would do no harm than the number of dangerous bubbles doomed to burst that would be desirably preempted.
Pointing out that absorbent booms can be produced more rapidly than containment booms, which are also being deployed in the Gulf, Ms.
The drive system on the S-80 and S-85 booms is hydrostatic, incorporating Sauer-Danfoss hydraulic pumps and two-speed wheel motors.
What is also remarkable about these payment imbalances is the ability of the English-speaking countries to finance their housing booms with local currency debt.