a)
b)
Figure 2: Example of a staying vessel track in a narrow area around Japan (in a narrow area for a long period of time, Staying period: 9-15 February 2019)
Figure a) Whole North American route
Figure b) Magnification of the red rectangle area

a)
b)
Figure 3: Example of a staying vessel track. (drifting over a wide area at a distance from land, Staying period: 10 May -18 June 2020)
Figure a) Whole North American route
Figure b) Magnification of the red rectangle area

a)
b)
Figure 4: Example of a staying vessel track (in wide area on the ocean far away from Japan in the ocean, Staying period: 29 April -14 May 2020)
Figure a) Whole North American route
Figure b) Magnification of the red rectangle area

a)
b)
c)
Figure 5: Example of a staying vessel track around Japan and far away from Japan (Staying period: 20-30 March, 6-18 June 2020)
Figure a) Whole North American route
Figure b) Magnification of the yellow rectangle area
Figure c) Magnification of the red rectangle area