DREDGE INTAKE - The sediment-gathering part of a dredge, including suc- 

 tion and cutterheads and the digging end of bucket ladders, but 

 excluding seabed mining apparatus for sorting dredged sediment by 

 size. When used with DREDGE PROPULSION, signifies that the intake 

 is propelled independently of the dredging vessel. When used with 

 PUMP, signifies that the intake includes a submerged pump. 



DREDGE LADDER CONTROL - A mechanism or method of controlling the position 

 of dredge bucket chains, ladders, and suction arms, inclioding wave 

 compensation devices. 



DREDGE PIPE - Pipe for conveying dredge spoil, including flexible joints 

 and floats. 



DREDGE PROPULSION - A means of moving a dredge, including apparatus for 

 placing spuds. 



DREDGE-SPOIL MEASUREMENT - Determination of spoil concentration or 

 volume, usually for control of the rate of dredging. 



DREDGE-SPOIL TRANSPORT - A means of loading or unloading hopper barges 

 or dredges, pumping spoil to a disposal site, or placing beach or 

 land fill. 



DREDGE, CUTTERHEAD - A suction dredge with a mechanical cutter. 



DREDGE, MECHANICAL - A bucket ladder, bucket chain, dragline, grab, 

 clamshell, or dipper dredge. 



DREDGE, SUBMERGED - A dredge with pump, propulsion, and control means 



underwater, usually supported by the seabed, excluding seabed mining 

 apparatus for sorting dredged sediment by size. 



DREDGE, SUCTION - A plain suction, dustpan suction, or trailing suction 

 dredge, with no mechanical excavating equipment. 



DUNE PROTECTION - Formation or preservation of dunes or dikes. 



ELECTRICAL GENERATOR - A source of electrical power. 



EMBEDMENT ANCHOR - A propellant-actuated or vibration-driven plate anchor, 

 a screw anchor, a driven or drilled-in-place anchor pile, or means 

 for installing such anchors. 



FABRIC MAT - A double-layered mattress of woven or nonwoven fabric or 



plastic film filled with sand or used as a form for grout or concrete, 

 a single layer of such material used as filter cloth, or a web of 

 synthetic material used to dissipate wave motion over a surface. 



FOULING PREVENTION - Protection of coastal structures, including seawater 

 Intakes, against incrustation with marine organisms. 



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