An anchorage is a designated waiting area outside a port where vessels anchor until a berth, pilot, or tidal window is available. Anchorage wait, the time between arriving at the anchorage and proceeding to berth, is a primary indicator of port congestion.
Anchorages are charted and managed: ships report in, take an assigned spot, and queue under the port’s rules, which may be first-come or berth-window based. Some waiting is routine scheduling slack; sustained multi-day waits across many vessels signal congestion, labour trouble, or weather backlog.
The wait is invisible in most carrier messaging: a vessel is “arrived” in casual usage while still swinging at anchor miles offshore. Distinguishing anchorage arrival from berthing is essential when reading arrival times.
On an AIS track an anchorage wait is unmistakable: the vessel stops short of the port and holds position or swings on its anchor. TrackingMCP reads that pattern to separate at anchor from alongside, so the ETA on your container in tracking reflects the queue, and port pages like Shanghai show how typical the current wait is.
An anchorage is a designated waiting area outside a port where vessels anchor until a berth, pilot, or tidal window is available. Anchorage wait, the time between arriving at the anchorage and proceeding to berth, is a primary indicator of port congestion.
For the vessel’s log it is an arrival event at the anchorage, but commercially meaningful arrival for cargo is berthing and discharge. Systems that blur the two overstate progress.
From hours in normal operations to days or weeks in severe congestion episodes. The distribution varies sharply by port and season, so compare against the port’s own recent norm rather than a global figure.
Port queue context →
Track vessels at anchor →
More in Ports & terminals: Port congestion · Dwell time · Terminal operating system (TOS) · Terminal appointment · Gate-in & gate-out · Empty return · Earliest return date (ERD) · Container yard (CY) · Container freight station (CFS) · Port of loading & discharge (POL/POD) · Browse all 106 terms →