An Investigation into Safety of Passage of Large Tankers in the Puget Sound Area. A Supplementary Study.
Abstract
The first phase of the study was conducted in 1977 at the Computer 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. Corrected sheets for the computational method presented in Volume I of the 1978 report are included. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1980
- Accession Number
- ADA102525
Entities
People
- W. Mcilroy