Accession Number:

ADA128889

Title:

Tug Usage for Control and Deceleration in Restricted Waterways,

Descriptive Note:

Corporate Author:

NATIONAL MARITIME RESEARCH CENTER KINGS POINT NY COMPUTER AIDED OPERATIONS RESEARCH FACILITY

Personal Author(s):

Report Date:

1982-12-01

Pagination or Media Count:

223.0

Abstract:

The investigations described in this report form the first part of a series of experiments planned at the Computer Aided Operations Research Facility CAORF to investigate the effectiveness of tugs in restricted waterways and the variability in pilot operating procedures. The present experiment involved comparisons between harbor pilots and docking masters, ship size 80,000 DWT and 250,000 DWT tankers, tug number, tug power, and tug availability. A simple harbor scenario involving straight legs 34 nm in length and 800 feet wide and a widened 45 deg turn was used. The waterdepth ratio was 115. The ships experienced a northwesterly wind fluctuating around 30 knots and a flood current of 1 knot in the channel direction. During the experiment each pilot performed three successive runs on his ship, followed by a final run that involved a complete engine and rudder failure just at the entrance to the turn. The data from the experiment were the examined qualitatively and selected performance measures were subjected to statistical analyses. On this basis, observations and conclusions were made relating to the comparisons indicated previously. Author

Subject Categories:

  • Construction Equipment, Materials and Supplies
  • Marine Engineering

Distribution Statement:

APPROVED FOR PUBLIC RELEASE