Vessel Delay Log
Scheduled vs actual berthing for every arrival you care about — the dataset behind free-time extension requests.
A vessel that berthed late ate your free time before you could act — every entry here with delay >0 is a candidate free-time extension request.
Sources & references
- AIS vessel tracking / port community systems
- Sea-Intelligence GLP — schedule reliability methodology
This tracker stores data locally in your browser — nothing is uploaded. It complements (not replaces) carrier track-and-trace: enter milestones from your carrier's notifications to keep one consolidated, private view across all providers.
Disclaimer: This tool is for general informational and estimation purposes only and is not professional financial, tax, accounting or legal advice. All figures are estimates — verify with a qualified professional before making decisions. Read the full disclaimer.
When a vessel berths four days late, three things happen: your inventory plan slips, your trucking bookings need remaking — and your free time often doesn't move, because availability-based clocks start whenever the box finally discharges into an already-congested pickup queue. This log captures scheduled versus actual berthing for every arrival carrying your cargo, with the delay's cause and your exposure.
About Vessel Delay Log
Two uses pay for the logging habit. Tactically, each delayed arrival is a documented free-time extension request: 'vessel scheduled 04 Jun, berthed 08 Jun' with the public schedule as evidence is the cleanest waiver ask in shipping. Strategically, the per-service average slip tells you which strings to trust with time-sensitive cargo — published schedules are aspirations; your log is the actuarial table. Sources are free: carrier schedules give the promise, port community systems and vessel trackers (AIS) give the truth, and the delta is thirty seconds of logging per arrival. The 'our containers aboard' field weights the dataset by what mattered — a chronic 3-day slip on your highest-volume service is worth more attention than a 7-day outlier on a string you used once.
How to use Vessel Delay Log
- 1Fill in the form and add your first record — everything persists locally in your browser.
- 2Watch the summary strip recompute totals and averages as records accumulate.
- 3Sort out stale entries with one-click delete; the data survives page reloads.
- 4Export the CSV any time for reporting or to move the log into a spreadsheet.
Why use Vessel Delay Log?
- ✓Purpose-built fields for this exact workflow — no spreadsheet setup
- ✓Live summary statistics computed from your records
- ✓One-click CSV export for reporting
- ✓Everything stays on your device — nothing is uploaded
Frequently asked questions
How do I find a vessel's actual arrival time?+
AIS-based trackers (MarineTraffic, VesselFinder and similar) show berthing in near-real-time; port community systems publish arrival/berth events; and the terminal's vessel schedule page shows worked vessels. For the log, the date the vessel ACTUALLY went alongside is the figure that matters — anchorage arrival is a different (earlier) event that flatters the carrier.
Does a late vessel extend my free time automatically?+
Almost never automatically — but commonly on request, because the cause is provably the carrier's. The ask: original ETA (their own schedule), actual berthing (public record), and the free time consumed by the gap. Carriers grant these routinely when documented; this log exists so the documentation takes two minutes instead of an archaeology project.
What's normal schedule reliability for container shipping?+
Global on-time performance (within 1 day of schedule) has ranged from ~30% in the 2021 chaos to ~50–80% in calmer periods, varying by lane and carrier. Your services' numbers matter more than the global figure — and after a quarter of logging you'll have them, including the metric the industry reports least: average delay WHEN late.
How does berthing delay differ from port congestion?+
Congestion is one cause of berthing delay (the ship waits at anchorage for a berth); others are upstream port delays, weather and schedule slides that have nothing to do with your port. The cause field matters because the remedies differ: congestion delays justify free-time relief at YOUR port; upstream slides justify pressure on the carrier's schedule integrity.
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