Sea-ice Pressure Generation and its Effect on Navigation in the Gulf of St. Lawrence Area

Instances of merchant ships beset in times of ice pressure in the Gulf of St. Lawrence were investigated to study the observed relationship between winds and ice pressure generation. The relative power of the ships reported beset was calculated in an attempt to relate ice pressure severity with ship...

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Bibliographic Details
Published in:Journal of Navigation
Main Author: Bradford, J. D.
Format: Article in Journal/Newspaper
Language:English
Published: Cambridge University Press (CUP) 1971
Subjects:
Online Access:http://dx.doi.org/10.1017/s0373463300022359
https://www.cambridge.org/core/services/aop-cambridge-core/content/view/S0373463300022359
Description
Summary:Instances of merchant ships beset in times of ice pressure in the Gulf of St. Lawrence were investigated to study the observed relationship between winds and ice pressure generation. The relative power of the ships reported beset was calculated in an attempt to relate ice pressure severity with ship performance. Most pressure episodes occurred during onshore winds or near the time of major wind shifts. Ice pressure intensity during onshore winds appeared to be related to wind strength and duration and distance from shore. The ‘Mouth of the Gaspé Passage’ area was anomalous.