The Effect of Weather On a Ship's Speed

Abstract

The need for better dead-reckoning data from several trials on HMAS KIMBLA, which is not fitted with a speed log, led to this attempt to model the effect of wind and sea-state on ship's speed. Weather data comprised only normal ship's log observations, which imposed a constraint on the factors considered. In particular, no specific data on wave and swell periods were recorded. Equations were set up to allow for augmentation of resistance due to waves, swell and applied rudder. In addition, the effects of the direct push of wind and waves on the forward and transverse components of ship's velocity were considered. The parameters were fitted to observed data on the set of the ship in varying weather conditions. Some recommendations for future work are included.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1977
Accession Number
ADA056220

Entities

People

  • Carl S. Nilsson

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Angle Of Incidence
  • Australia
  • Chemistry
  • Correlation Analysis
  • Dead Reckoning
  • Department Of Defense
  • Equations
  • Errors
  • Measurement
  • Naval Architecture
  • Navigation
  • Observation
  • Oceans
  • Propellers
  • Satellite Navigation Systems
  • Wind
  • Wind Velocity

Fields of Study

  • Environmental science

Readers

  • Climatology
  • Marine Hydrodynamics
  • Systems Analysis and Design