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Towards a Method Evaluating Control Actions in STPA-Based Model of Ship-Ship Collision Avoidance Process

[+] Author Affiliations
Krzysztof Wróbel, Mateusz Gil, Jakub Montewka

Gdynia Maritime University, Gdynia, Poland

Paper No. OMAE2018-77790, pp. V11AT12A026; 9 pages
  • ASME 2018 37th International Conference on Ocean, Offshore and Arctic Engineering
  • Volume 11A: Honoring Symposium for Professor Carlos Guedes Soares on Marine Technology and Ocean Engineering
  • Madrid, Spain, June 17–22, 2018
  • Conference Sponsors: Ocean, Offshore and Arctic Engineering Division
  • ISBN: 978-0-7918-5132-6
  • Copyright © 2018 by ASME


As system-theoretic methods of safety assessment are developed, certain aspects of them remain under-explored, including the question of prioritizing one control action’s adequacy over another. This paper investigates this feature based on an analysis of a process of merchant vessels’ collision avoidance. We first elicit experts’ views on the structure of the process and importance of particular interactions occurring therein. Thence, we analyse a number of incident reports to examine the percentage of cases in which failure to ensure the particular control action contributed to the loss. By comparing the results, we strive to determine whether any of the approaches might be beneficial in determining safety control actions’ priorities.

Copyright © 2018 by ASME



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