Preliminary Inter-comparison of AIS Data and Optimal Ship Tracks
Mannarini, Gianandrea; Carelli, Lorenzo; Zissis, Dimitris; Spiliopoulos, Giannis; Chatzikokolakis, Konstantinos
TransNav, the International Journal on Marine Navigation and Safety of Sea Transportation, Vol. 13, No. 1, doi:10.12716/1001.13.01.04, pp. 53-61, 2019
Abstract
Optimal ship tracks computed via the VISIRmodel are compared to tracks recorded by the Automatic Identification System (AIS). The evaluation regards 43 tracks in the Southern Atlantic Ocean, sailed during 2016-17 by different bulk carriers. In this exercise, VISIR is fed by wave analysis fields from the Copernicus Marine Environment Monitoring Service (CMEMS). In order to reproduce vessel speed loss in waves, a new methodology is developed, where kinematic information from AIS is complemented by wave information from CMEMS. Resulting VISIR tracks are analyzed along with AIS tracks in terms of their topological features and duration. The tracks exhibit quite diverse topological shapes, including orthodromic, loxodromic, and other paths with complex and dynamic diversions. The distribution of AIS to VISIR track durations is analyzed with respect to several parameters, such as the AIS to VISIR track length and their Fréchet distance. Model features of VISIR affecting the results are discussed and a future development suggested by the results are outlined.
This work has received funding from the European Union Horizon 2020 research and innovation programme under grant agreements No. 633211 (AtlantOS) and No. 732310 (BigDataOcean) and the Italy-Croatia Interreg V-A programme under project ID 10043587 (GUTTA).
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