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CPA Calculation Method based on AIS Position Prediction

Sang, L-Z and Yan, X-P and Wall, A and Wang, J and Mao, Z (2016) CPA Calculation Method based on AIS Position Prediction. Journal of Navigation, 69 (6). pp. 1409-1426. ISSN 0373-4633

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Abstract

The information on the Closest Point of Approach (CPA) is required in a potential collision situation as it determines the risk to each vessel. CPA is usually calculated based on the speed and direction of the approaching ship neglecting the Change Of Speed (COS) and the Rate Of Turn (ROT). This will make the CPA less useful. To improve the CPA calculation, the Automatic Identification System (AIS) information containing the Speed Over Ground (SOG), Course Over Ground (COG), COS and ROT is used. Firstly, a model using these four factors is built to predict ship positions better. Secondly, a three-step CPA searching method is developed. The developed CPA calculation method can assist in informing the navigation decisions and reducing unnecessary manoeuvres. Through the analysis of a real collision scenario, this paper shows that the proposed method can help identify and warn anomalous ship behaviours in a realistic time frame.

Item Type: Article
Uncontrolled Keywords: 0909 Geomatic Engineering
Subjects: T Technology > TC Hydraulic engineering. Ocean engineering
V Naval Science > VM Naval architecture. Shipbuilding. Marine engineering
Divisions: Maritime and Mechanical Engineering
Publisher: Cambridge University Press
Related URLs:
Date Deposited: 05 Jan 2017 10:21
Last Modified: 06 Sep 2017 15:40
DOI or Identification number: 10.1017/S0373463316000229
URI: http://researchonline.ljmu.ac.uk/id/eprint/5162

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