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A Unified Measure Of Collision Risk Derived From The Concept Of A Ship Domain

Published online by Cambridge University Press:  23 August 2006

Rafal Szlapczynski
Rafal Szlapczynski
Affiliation:
Gdansk University of Technology, Poland Email: rafal@pg.gda.pl
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Abstract

The paper introduces a new measure of collision risk derived from the concept of a ship domain. Its simplicity and the fact that it takes into account the courses of both ships, makes it a good alternative to the commonly used term of the distance at the closest point of approach (DCPA). The measure being presented is flexible enough to be applied in combination with any given ship domain. Derivations of all the necessary equations for the Fuji domain have been presented in detail. Additionally, the paper contains numerical algorithms that are capable of determining value of the measure for any other ship domain. Based on these algorithms a generic method for determination of the necessary course alteration is developed. Also, an example of an already known formula for risk assessment, that may benefit from the measure, is provided. All of the algorithms, formulas and their derivations in the text are presented explicitly, so that they could be directly applied in any collision avoidance or VTS system.

Keywords

Ship domainDCPACollision riskCollision avoidance
Type
Research Article
Information
The Journal of Navigation , Volume 59 , Issue 3 , September 2006 , pp. 477 - 490
Copyright
Copyright © The Royal Institute of Navigation 2006

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