As to Marine traffic, sometimes that happens here in Malta also, but worst of all is when I check Marine traffic in the morning and find a large tanker or vehicle carrier berthed in an impossible corner of the harbour such as the yacht marina .
Also some vessels keep on appearing hours after they have departed the spot indicated as our friend has commented upon.
Marine traffic is not Gospel, sometimes it must be taken with a pinch of salt. Nothing is infallible.
thanks and regards
Emmanuel.L. (Malta)