At the default setting, there is a noticeable absence of ships in the Atlantic to the west of the British isles - where is the traffic between Northern Europe and the Americas? I wondered if it was due to really bad weather (no - it appears to be good), but if you zoom in, the traffic appears.
As far as I can tell, this is not a consequence of the filter settings - no exclusions seem to be set.
As far as I can tell, this is not a consequence of the filter settings - no exclusions seem to be set.