UNDERWATER MOORING SYSTEM
Abstract
On 17 July 1961, a sea water environment test was initiated to determine the useful life of a 7/64-in.-diameter galvanized steel cable, sheathed with a 0.020 polyethylene coating. This specific work was undertaken as a part of NCEL Task NUSL-16407, Development of a Container for a Master Repeater Unit. The test cable had a proven breaking strength of 1600 pounds. The test consisted of an underwater mooring of a 32-ft-long, 20-in.-diameter cylinder with 700 lbs of positive buoyancy. This cylinder container was lowered to a depth of 130 ft at its lower end, held by the test cable attached to a 1500-lb concrete clump anchor. The design life of the test cable was six months. The container was found adrift approximately one mile from its moored position on 23 September 1964, three years and two months after installation. There are reasons to believe that the test cable's useful life far exceeded its design life due to the protection against sea water corrosion of steel cable provided by polyethylene coating.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 07, 1965
- Accession Number
- AD0461146
Entities
People
- John J. Boyles
- R. E. Jochums
Organizations
- Naval Facilities Engineering Service Center