Unclassified 



Secunlv Classific 



DOCUMENT CONTROL DATA -R&D 



Naval Civil Engineering Laboratory 

 Port Hueneme, California 93043 



Unc lassif ied 



HYDRAULIC TOOLS AND EQUIPMENT FOR UNDERWATER SALVAGE 



Not Final; Nov 1970 to Jun 1971 



(First name, middle initial. last name) 



G. Lonn Liffick and Fred B. Barrett 



July 1972 



34 



43-003 



TN-1229 



) (AnY other numbers 



Approved for public release; distribution unlimited 



Naval Ship Systems Command 



Extending the U. S. Navy's underwater salvage capability will require 

 improved diver-operated tools and equipment. The Naval Civil 

 Engineering Laboratory (NCEL) is conducting a program to develop 

 hydraulic hardware for future underwater salvage operations. Commer- 

 cially available hydraulic pumps, rigging, load handling and cutting 

 equipment have been evaluated at NCEL to determine characteristic 

 diver performance and mechanical suitability for underwater operation, 

 Manually operated hydraulic pumps were modified and pumped against a 

 load cell to determine reasonable levels of diver exertion. Tests 

 have shown that divers can be utilized as prime movers for small jobs 

 and that some conventional surface hydraulic equipment can be used 

 underwater for reasonable periods of time with a minimum of addition- 

 al maintenance. Surface hydraulic equipment suitable for underwater 

 operation includes manual pumps, rams, cylinders and several cutters. 

 However, innovative new equipment is urgently required for underwater 

 salvage, particularly for load handling. 



DD,?o?»1473 



S/N 010 1.607-6801 



Unclassified 



Security Classification 



