OPERATIONAL STABILITY IN FOLLOWING AND QUARTERING SEAS - A PROPOSED GUIDANCE AND ITS VALIDATION

A new practical guidance is described and validated for avoiding dangerous situations in following and quartering seas. This guidance presents a desired course and velocity to avoid capsize due to pure loss of stability as well as broaching. For the pure loss of stability, the reduced righting arm on a wave profile and the spectrum of ocean waves are taken into account. For broaching, the critical velocity is identified for surf-riding, because surf-riding can be regarded as a prerequisite of broaching. The guidance requires the master to detect only the Beaufort scale, wave period and natural roll period. To examine this guidance, existing results from model experiments of fishing vessels and container ships are compared with the dangerous zones that are indicated by the guidance. As a result, it is confirmed that all capsize events in these experiments occurred in the dangerous zones specified in the guidance.

  • Supplemental Notes:
    • STAB 94, 5th Intl Conf on Stability of Ships and Ocean Vehicles; 7-11 Nov 1994; Florida, USA. Sponsored by SNAME, USA and RINA, UK. Procs. Publ by Florida Inst Technology, USA. Vol 2, session 6 [15 p, 24 ref, 1 tab, 8 fig]
  • Authors:
    • Umeda, N
  • Publication Date: 1994

Language

  • English

Subject/Index Terms

Filing Info

  • Accession Number: 00717034
  • Record Type: Publication
  • Source Agency: British Maritime Technology
  • Files: TRIS
  • Created Date: Mar 4 1996 12:00AM