OFFSHORE PLATFORM, LEG - A support for the working deck of a fixed, float- 

 ing, or jack-up platform. 



OFFSHORE PLATFORM, WALKING - A platform that can be moved horizontally 

 vhile supported by the bottom, including devices for changing the 

 horizontal position of the legs. 



OFFSHORE STORAGE TANK, EMERGENT - A tank with at least one storage chamber 

 above or piercing the water's surface. 



OFFSHORE STORAGE TANK, SUBMERGED - A tank with all storage chambers 



underwater, in some cases including an attached mooring and service 

 structure protruding above the surface. 



OFFSHORE STRUCTURE FENDER - A device for preventing or absorbing the 

 impact between an offshore structure and ships, ice, or debris. 



PIER FENDER - A device for absorbing the Impact between a dock structure 

 and a water craft. 



PIER, FIXED - A recreation or dock structure rigidly supported by piles 

 or legs on the bottom or cantilevered out from the shore. 



PIER, FLOATING - A dock structure supported by its buoyancy. 



PIER, MOBILE - A fixed or floating dock structure designed to be dis- 

 mantled, moved, and reassembled easily. 



PILE DOLPHIN - A freestanding pile or cluster of piles, usually used in 

 a harbor, designed to absorb impacts with watercraft. 



PILE DRIVER LEADS - Guides for a pile or hammer, including means for 

 controlling batter. 



PILE DRIVER, IMPACT - A means of driving a pile by a succession of 



Impacts, including drop hammers, steam hammers, and diesel hammers. 



PILE DRIVER, VIBRATORY - A means of driving a pile by vibrating the pile 

 at a resonant frequency, including "sonic drivers" and rotated 

 eccentric weights. 



PILE DRIVER, WATER JET - A means of driving a pile, or aiding other 



methods of pile driving, by using a jet of fluid to remove material 

 below the pile. 



PILE-DRIVING SHOE - A cutting shoe used at the bottom of concrete, wood, 

 or thin steel piling to aid driving. 



PILE EXTRACTOR - A means of removing a pile from the earth. 



PILE FOOTING - A means of increasing a pile's bearing capacity by increas- 

 ing the diameter of the bearing area in the surrounding soil. 



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