Abstract
Efficient maritime navigation through dynamic obstructions at close range is still a serious issue faced by mariners. There have been studies focusing on collision risk assessment in the past, but the majority were based on the first person perspective, with area-based ship domain concepts that are defined around either the ownship or the obstacle. Such methods are acceptable for encounters where the ownship is required to manoeuvre according to the collision regulations (COLREGs), but they will not work correctly if the ownship is the stay-on party. This article presents an alternative method of assessing the collision risk for surface ships in close-range encounters that is compliant with the COLREGs as well as other ships from different perspectives.














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In this article, a ship that is in direct control is referred as an ownship (OS), while any other ship besides an OS is referred as the target ship (TS) or obstacle.
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Acknowledgments
The authors would like to express their gratitude for financial support from the ACCeSS group. The Atlantic Centre for the Innovative Design and Control of Small Ships (ACCeSS) is an ONR-NNRNE programme with grant number N0014-03-0160; the group consists of universities and industrial partners that perform small-ship-related research. The authors also wish to thank Alistair Greig for his comments.
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Tam, C., Bucknall, R. Collision risk assessment for ships. J Mar Sci Technol 15, 257–270 (2010). https://doi.org/10.1007/s00773-010-0089-7
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DOI: https://doi.org/10.1007/s00773-010-0089-7