This article analyzes the various problems encountered while moving heavy and cumbersome structures along waterways of limited size. It is shown that the drift angle magnitude is determined by the equilibrium of the following forces acting on the vessel formation: the wind-generated aerodynamic force; the hydrodynamic forces acting on the underwater surfaces of all the included vessels; the inertial force; the current-generated force; the tugboat steering gear force; and the tugboat propulsive forces. Calculations and equations are presented, taking into account the different variables influencing the steerability of the formation. Finally, the author proposes recommendations for use in the planning and piloting of large structures in a constricted waterway. These are: rearrangement/replacement of tugboats; allowing for direction and forces of existing and anticipated winds; and constant analysis of piloting conditions.

  • Supplemental Notes:
    • Journal article; DTIC distribution restrictions apply
  • Authors:
    • Pershits, R Y
  • Publication Date: 0

Media Info

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Filing Info

  • Accession Number: 00660014
  • Record Type: Publication
  • Source Agency: Maritime Technical Information Facility
  • Files: TRIS
  • Created Date: Jul 21 1994 12:00AM