This paper proposes general analysis procedures for investigating necessary ship controllability and conditions limiting safe control in restricted waterways. General types of problems requiring controllability analysis are outlined and a consistent approach to problem solving is suggested. The paper recognized real conditions, and explores available tools which may be applied. Three main tasks are identified: (1) to break down navigational requirements into a succession of linked elemental maneuvers, (2) to predict a ship's controllability under defined conditions, and (2) to decide the nature and magnitude of meaningful indices and margins. Several variables of ship and waterway configuration complicate the problem, and human shiphandling factors and environmental conditions must be included. The paper describes available and emerging controllability analysis techniques and gives some guidance on time and costs involved. Ideas on realistic ship controllability indices and margins are presented. Typical studies are suggested, and some possible maneuvering trials based on real operations are proposed, together with thoughts on the preparation of pilothouse maneuvering information. The need to combine analysis with successful ship experience is stressed. The paper does not offer a final controllability analysis procedure but puts forth Panel H-10 views on a modern approach as a base for discussion.

  • Supplemental Notes:
    • Presented at the First Ship Technology and Research (STAR) Symposium, Washington, D.C., August 26-29, 1975. Prepared by Panel H-10 (Controllability) of SNAME T&R Hydrodynamics Committee.
  • Corporate Authors:

    Society of Naval Architects and Marine Engineers

    601 Pavonia Avenue
    Jersey City, NJ  United States  07306-2907
  • Publication Date: 1975-8

Media Info

  • Features: References;
  • Pagination: 18 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00126932
  • Record Type: Publication
  • Source Agency: Society of Naval Architects and Marine Engineers
  • Report/Paper Numbers: No. 4
  • Files: TRIS
  • Created Date: Nov 5 1975 12:00AM