UFO 3

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. La Spezia

   no cargo change

   → · 4 h in port· draught 1.8→1.8 m
2. Portovenere

   no cargo change

   → · 13 h in port· draught 1.8→1.8 m· medium confidence
3. Monterosso al Mare

   no cargo change

   → · 3 h in port· draught 1.8→1.8 m
4. Portovenere

   no cargo change

   → · 22 h in port· draught 1.8→1.8 m· low confidence

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. Portovenere· Italy

   35 h
   2 calls · 18 h avg
2. La Spezia· Italy

   4 h
   1 call · 4 h avg
3. Monterosso al Mare· Italy

   3 h
   1 call · 3 h avg

Based on 4 completed calls observed since — open calls (no departure yet) are excluded. The distribution sharpens as AIS history accrues.