As an example of how difficult it can be to ID a vessel: Gulf River.
Visual conditions at their limits: cannot see the boats. Even with lens/optics visibility is very limited.
In fact, we thought this was a different vessel: likely Megalon (which it's not) . But that is what the AIS database said.
As before ,,, how do you ID a vessel? If you have a clear photo ... that is your starting point (you can see the name). If not ... you use the various AIS databases - generally accurate if you are careful about refreshing the data.
But if the weather is nasty and your visual data is limited ???
Name : Gulf River
Heading: North: Black Sea
Type: cargo
Flags: Togo
Date: 18 Jan 2017
Weather: snow is going away- now drizzle rain
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