| 1. |
- Hörteborn, Axel, 1986, et al.
(författare)
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A revisit of the definition of the ship domain based on AIS analysis
- 2019
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Ingår i: Journal of Navigation. - 0373-4633 .- 1469-7785. ; 72:3, s. 777-794
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Tidskriftsartikel (refereegranskat)abstract
- When ships approach each other, they should keep a minimum area around them clear of other vessels in order to remain safe. The geometrical shape of this area has been studied since the early 1970s and is defined as the ship domain. The progress in computer capacity since then and the introduction of the Automatic Identification System (AIS) provides the potential to further investigate the size and the governing factors of the domain. This investigation revisits and proposes a method using data based on 600,000 ship encounters at 36 locations. It is concluded that the ship domain has the shape of an ellipse with half axis radii of 0.9 and 0.45 nautical miles. However, there are two factors that greatly affect the ship domain: how large the area is that is used to gather vessel intersections and whether they are constrained by water depth. In contradiction to some previous research, it is found that the ship domain is unrelated to the length of the ship.
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| 2. |
- Svanberg, Martin, 1982, et al.
(författare)
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AIS in maritime research
- 2019
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Ingår i: Marine Policy. - : Elsevier BV. - 0308-597X .- 1872-9460. ; 106
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Tidskriftsartikel (refereegranskat)abstract
- Although not originally developed for research use, the Automatic Identification System (AIS) enables its data to be used in research. The present paper provides a structured overview of how AIS data is used for various research applications. Ten areas have been identified, spread across maritime, marine and other journals. Many stakeholders beyond the most frequently mentioned – authorities and maritime administrations – can benefit from the research in which AIS data is used. AIS data can be incorporated in various types of modelling approaches and play a small or large role as a source of data. AIS data can also be validated or used to validate research from other data sources. Although a large amount of AIS-based research adds to the literature, there is still a large potential for using AIS data for research by making greater use of the variety in AIS messages, combining AIS with other sources of data, and extending both spatial and temporal perspectives.
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