GRACE

Arrivals, time in port and the load/discharge inferred from the draught change — detected from AIS track history. An open call means the vessel is still in port (no departure observed yet).

1. Grau Rheindorf

   no cargo change

   → · 3 h in port· draught 1.6→1.6 m
2. Köln

   no cargo change

   → · 7 h in port· draught 1.6→1.6 m· medium confidence
3. Port of Amsterdam

   no cargo change

   → · 23 h in port· draught 1.6→1.6 m
4. Ghent

   no cargo change

   → · 2 h in port· draught 1.6→1.6 m· medium confidence
5. Port of Antwerp-Bruges

   no cargo change

   → · 21 h in port· draught 1.6→1.6 m

Method: each call is a run of fixes inside a port’s geofence confirmed by a stop (or an AIS gap); load/discharge is the sign of the draught delta over the call. Indicative — arrivals before our AIS history began read from the first observation.

Time-in-port summed by port from the AIS-detected port-call history — the ports this vessel has spent the most time at, longest first.

1. Port of Amsterdam· Netherlands

   23 h
   1 call · 23 h avg
2. Port of Antwerp-Bruges· Belgium

   21 h
   1 call · 21 h avg
3. Köln· Germany

   7 h
   1 call · 7 h avg
4. Grau Rheindorf· Germany

   3 h
   1 call · 3 h avg
5. Ghent· Belgium

   2 h
   1 call · 2 h avg

Based on 5 completed calls observed since — open calls (no departure yet) are excluded. The distribution sharpens as AIS history accrues.