SEISMIC RECOBD PROCESSOR - An electronic device for recording, deciphering, 

 or printing signals from underwater seismic receivers. 



SEISMIC STREAMER CABLE - A linear array of hydrophones attached to a 

 towing cable, protective sheathing, and means for controlling the 

 array's position. 



SEISMIC SURVEY METHOD - A method of organizing and operating the compo- 

 nents of an underwater seismic surveying system to use the equipment 

 in different water depths or to detect features at specific depths 

 in the seabed, including altering the instrument locations in a 

 survey team's boats, the streamer cable arrangements, or the 

 sequences of firing and recording cycles. 



SEISMIC VIBRATORY ACOUSTIC TRANSMITTER - An underwater seismic signal 



source using an electrically, pneumatically, or hydraulically actuated 

 vibrating transducer. 



SLOPE PROTECTION - Stabilization of the faces of banks, dikes, or dunes 

 to prevent sliding or erosion from runoff, including terracing or 

 placement of mats, filter cloth, or other revetment materials. 



SMALL-CRAFT LAUNCHER - A means for transferring watercraf t to the water 



from storage on land and vice versa, including raihps, booms, or hoists. 



SMALL-CRAFT MOORING DEVICE - A device for securing a watercraft in place 

 in a harbor or dock. Including mooring buoys, dock cleats, tie-off 

 arrangements, or fender designs. 



SMALL-CRAFT PIER - A fixed or floating dock structure for use in a small- 

 craft harbor. 



SMALL-CRAFT SERVICE STRUCTURE - A structure for storing or servicing 



small craft, including storage racks, drydocks, hull cleaning equip- 

 ment, or sewage collection systems. 



SONAR, DEPTH SOUNDER - A device or method using sound or light waves to 

 determine the depth, and, in some cases, character of the seabed, and 

 an associated piece of bathymetric mapping equipment, such as a 

 recorder. 



SONAR, SIDE LOOKING - A depth-measuring device or method using sound 



waves projected to the side of the survey track, at an oblique angle 

 to the bottom, to detect the relief of the seabed, and, in some 

 cases, associated equipment for producing bathymetric contour maps. 



STRUCTURE INSPECTION - Detection of damage to coastal structures, includ- 

 ing the X-ray photography or sonography of piles or platform legs to 

 detect fouling, corrosion or fatigue damage, or the surveying of 

 rubble structures to detect the removal of material. 



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