Unclassified 



CLASSIFICATION OF THIS PAGE (When Data En 



REPORT DOCUMENTATION PAGE 



REPORT NUMBER 



TR-829 



2. GOVT ACCESSION NO 



DN044052 



3. RECIPIENT'S CATALOG NUMBER 



TITLE (and SublilJeJ 



DEVELOPMENT AND EVALUATION OF A MOTION 

 COMPENSATING LIFT SYSTEM FOR DEEP OCEAN 

 CONSTRUCTION 



5. TYPE OF REPORT & PERIOD COVERED 



Final; Jul 1969 -Oct 1974 



6. PERFORMING ORG. REPOR 



7. AUTHORfsJ 



L. W. Hallanger, Ph D and R. L. Brackett 



CONTRACT OR I 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Civil Engineering Laboratory 



Naval Construction Battalion Center 



Port Hueneme, California 93043 



63713N, S46-36X, WBS 3.1410, 

 3.1410A 



. CONTROLLING OFFICE NAME AND ADDRESS 



Naval Facilities Engineering Command 

 Alexandria, Virginia 22332 



12. REPORT DATE 



December 1975 



30 



^BER OF PAGES 



14. MONITORING AGENCY NAME S ADDRESSfif di/ 



I Controlling Otitce) 



15, SECURITY CLASS, (ot this report) 



Unclassified 



ISa. DECLASSIFICATION 'DOWNGRADING 

 SCHEDULE 



16. DISTRIBUTION STATEMENT (ol this Report) 



Approved for public release; distribution unlimited. 



17. DISTRIBUTION STATEMENT (of the abstract enter&d in Block 20. if different from Report) 



18. SUPPLEMENTARY NOTES 



19. KEY WORDS (Cot 



Lift systems, motion compensation, load handling, shipboard cranes. 



20. ABSTRACT (Coi 



A system to raise and lower loads in the deep ocean while providing lift-line tension 

 control and payload motion control was designed, fabricated, and tested. Design parameters 

 included a maximum wet payload weight of 40,000 pounds at a maximum operating depth 

 of 6,000 feet through sea conditions state 4 when the system is mounted on an ARS-type 

 vessel. A load-handling system of this type allows soft landing of a payload on the seafloor. 



continued 



DD 1 JAN 73 1473 EDITION OF 1 NOV 55 IS OBSOLETE 



WIBL/WHOI 



Unclassified 



SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) 



D D3D1 DDMQB^T 4 



