AN INVESTIGATION INTO SAFETY OF PASSAGE OF LARGE TANKERS IN THE PUGET SOUND AREA--A SUPPLEMENTARY STUDY

The first phase of the study was conducted in 1977 at the Compuer Aided Operations Research Facility to investigate the safety of passage of tankers through the Puget Sound area under maximum credible adverse environmental conditions. The track-keeping results of that phase indicated that all ships were able to navigate safely under the extreme environmental conditions provided they maintained sufficient speed. The failed equipment runs indicated that tug support of ships was required to avoid grounding after suffering steering/propulsion failures. This supplementary study provides data on the transfer and advance of a 400K DWT tanker after a combined steering/propulsion failure under the same conditions as the earlier study. A formula relating tug force to ship tonnage was developed from data derived from the earlier study; computer runs in this study validated that formula. In addition, this supplementary study investigated the use of a rudder tug to control speed and heading of 120K, 165K, and 280K tankers.

• Corporate Authors:

  National Maritime Research Center, Kings Point

  United States Merchant Marine Academy
  Kings Point, NY  United States  11024

  United States Coast Guard

  Office of Marine Environment and Systems
  Washington, DC  United States  20590
• Authors:
  • Mcilroy, W
• Publication Date: 1980-5

Media Info

• Pagination: 35 p.

Subject/Index Terms

• TRT Terms: Emergencies; Maneuvering; Mechanical failure; Ship simulators; Steering; Tankers; Tug ship interaction
• Old TRIS Terms: Emergency steering; Restricted water operation; Steering failure; Tanker maneuvering
• Subject Areas: Marine Transportation; Vehicles and Equipment;

Filing Info

• Accession Number: 00323326
• Record Type: Publication
• Report/Paper Numbers: CAORF 42-7703-01S Tech Rpt.
• Contract Numbers: MIPR Z 700998843822
• Files: TRIS
• Created Date: Feb 6 1981 12:00AM