Considerable progress has been made recently in the areas of ship-to-ship transfer at sea and in salvage operations with the use of large marine fenders. These fenders can absorb the tremendous kinetic energy of two moving ship masses and transform it into potential energy. In the last ten years, the most commonly used energy absorbing media has been a pressurized air bladder or penumatic structure. In this case, the energy is absorbed primarily by raising the pressure of the air within this structure. This has been generally acceptable but problems have arisen with the requirement for inflation of the structure, with maintenance of safety valves, and with the possible adverse consequences of an inflatable fender rupturing under pressure. In response to these problems and others, the SEA CUSHION marine fender has been developed. Unlike pneumatic fenders, the SEA CUSHION is filled with a flexible closed-cell foam which is specially formulated to absorb impact energy. The SEA CUSHION method of energy absorption may be likened to the compression of a spring since the foam exhibits a spring-like behavior. Unlike the pneumatic fender, the pressure inside the foam fender does not rise significantly when compressed and there is no need for relief valves or inflation valves. Since the closed-cell foam is much more efficient in absorbing energy than air, a SEA CUSHION fender has approximately 30 percent greater energy absorption than a pneumatic fender of equal size. Also, at the same energy absorption level, a SEA CUSHION fender has approximately 20 percent less reaction force than an identically sized penumatic fender. The SEA CUSHION is also lightweight, rugged (operates even if punctured), safe, and uses long-life high quality materials.

  • Supplemental Notes:
    • Cost of entire Proceedings is $25.00.
  • Corporate Authors:

    Marine Technology Society

    5565 Sterrett Place, Suite 108
    Columbia, MD  United States  21044
  • Authors:
    • March, F A
    • Beach, R L
  • Publication Date: 1974-9

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00071895
  • Record Type: Publication
  • Source Agency: Marine Technology Society
  • Report/Paper Numbers: Proceeding
  • Files: TRIS
  • Created Date: Nov 12 1974 12:00AM