
Median and 90th-percentile time in port per harbour: the turnaround metric (not a single average, but the full dwell distribution).
Across the 60 well-sampled ports, half of all calls clear in about 13 h, but the distribution is what bites: at Warnemünde the slowest tenth run past 3.0 d, 7.6× its 10 h median, the most stretched tail on the board. 41 ports carry a P90 at least 3× their median, where a berth that usually turns in hours can hold a ship for days.
Each harbour's typical call (the median dot) and the reach of its slowest tenth (the amber P90 tail). The longer the amber, the less predictable the berth: a call that usually turns in hours can still become a multi-day hold.
Turnaround = arrival→departure time at each port from detected port calls. Ports ranked by completed-call volume; median and p90 over completed calls only (open calls, vessels still in port, are counted separately). Indicative and improving as coverage deepens. The 60 busiest ports are listed, between them 73,550 completed calls; 236,203 completed calls have been detected across the covered network.