Application of a Decision Support Tool for the Collision Avoidance of a Container Vessel
- Panagiotis Mizythras (University of Strathclyde) | Evangelos Boulougouris (University of Strathclyde) | Gerasimos Theotokatos (University of Strathclyde)
- Document ID
- International Society of Offshore and Polar Engineers
- The 29th International Ocean and Polar Engineering Conference, 16-21 June, Honolulu, Hawaii, USA
- Publication Date
- Document Type
- Conference Paper
- 2019. International Society of Offshore and Polar Engineers
- risk index, quantitative risk analysis, collision avoidance, COLREGs, decision support tool, propulsion system performance, 3-DOF manoeuvring
- 1 in the last 30 days
- 15 since 2007
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In this paper, a decision support tool for collision avoidance is presented. The collision probability of the investigated container vessel is estimated using a 3-step approach. In this methodology, the manoeuvrability and the propulsion system performance of the own vessel is taken into account, increasing the accuracy of the collision risk probability. The results of the validation process are presented and the collision risk probability at various near miss counter scenarios is evaluated. Moreover, the methodology presented herein, allows the holistic assessment of the impact that actions in accordance to the IMO COLREGs or violating them have. They are all included in the selection of the optimum control options to minimize the risk of a collision as sea.
The growth dynamics of the international commodities and people transports has resulted to the rapid expansion of the world fleet, as 80 per cent of world trade is transported by sea (IMO, 2019). The containerization in particular has increased the demand of containership application in maritime logistics (UNCTAD, 2017). The boost of the world maritime fleet increases the collision risk probability, especially in straits and coastal waters (EMSA, 2017). International Maritime Organization (IMO) has published the COLREGs guidelines with the procedures to be followed for the avoidance of collision (IMO, 1972). Moreover, the decisions on board are supported by modern electronic instrumentation that provides information and awareness regarding the navigational safety of the vessels (IMO, 1974). However, these tools estimate a posterior probability, neglecting the manoeuvring characteristics and the propulsion system of the own vessel, parameters that affect the collision risk estimation (af Geijerstam, et al., 2008). Furthermore, state-of-the-art quantitative risk analysis (QRA) models depend for their validity on how well they estimate the ship-ship collision conditional to an encounter (Goerlandt et al., 2014). However, in most cases they still rely on the blind navigation assumption.
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