Unclassified 



Srciintv Classific 



DOCUMENT CONTROL DATA -R&D 



cufily rMiii/zrafion o/ llllo, body ol fibytrnci nnd indexing unnomtion n\uyl be enlerei 



^ overall rtporl Is rlsssllied) 



Naval Civil Engineering Laboratory 

 Port Hueneme, California 93041 



Unclassified 



FEASIBILITY STUDY AND COMPARATIVE ANALYSIS OF DEEP OCEAN LOAD 

 HANDLING SYSTEMS 



DESCRIPTIVE NOTES (Type of report end Ineluelve dmiee) 



Final; October 1968 - June 1969 



s. luTHOKlsl (FIritntme, middle Inllltl, Imil ntme) 



D. A. Davis and M. J. Wolfe 



e. REPORT DATE 



December 1969 



NO. or PASES 7b. NO. OF REF 



155 I 37 



ea. CONTRACT OR 



b. PROJEC 1 



I'S REPORT NUMeER(St 



YF 38.535.003.01 .007A 



TR-652 



96. OTHER REPORT NO(5) (Any other number) 



■ION STATEV 



This document has been approved for public release and sale; its distribution is unlimited. 



Naval Facilities Engineering Command 

 Washington, D. C. 



Nine candidate systems for lowering and raising negatively buoyant loads in the deep ocean 

 were compared and evaluated by means of a systems effectiveness model. For both load ranges 

 considered - 20 to 100 tons and 400 to 600 tons at 6,000 feet - a lift system employing a ship 

 with pipe string suspension medium was considered to be the most feasible approach. 



Accurate positioning of heavy modular loads can be most readily achieved by resorting to 

 acoustic devices for guiding the translation and rotation of the surface support craft prior to final 

 emplacement. A manned submersible would serve as a useful guidance backup system. 



The transport of 10- to 30-ton loads for short distances in the near bottom environment is 

 considered feasible. Final choice between two competing systems, a heavy-life submersible and a 

 hydrocopter, must await further definition of work missions and load configurations. 



DD 



.,1473 ^^^^^ ' 



Unclassified 



S/N 0101.807.6801 



