Does an ETA/ETD get updated in case a vessel is delayed?

Yes and No. A vessel’s ETA/ETD at any port will update before a vessel departs the “start port” of a voyage. After a vessel departs the “start port” of a voyage, none of the ETA/ETD at ports of call will be updated. However, we can add actual ATD and ATA from AIS, so you can see delays as they occur.