Diversions don’t just delay cargo—they re-time it. When schedules slip and recover in batches, arrivals compress: “nothing arrives,” then multiple ships land at once. This playbook explains why it happens and how to triage before discharge—so drayage, customs, and warehouse capacity don’t collapse under the surge.
During major routing disruptions, delays are only the first-order problem. The second-order problem is timing: cargo doesn’t arrive “evenly late.” It arrives in clusters.
That’s the paradox many import and forwarder operations teams recognize: for days it feels like nothing is landing—then several vessels (or multiple services on the same loop) arrive within a tight window. Yard space tightens, truck appointments vanish, chassis availability swings, customs exams stack up, and warehouses hit a labor wall.
This post explains the mechanics behind arrival compression and offers an operational playbook to survive the surge: how to triage before arrival, how to allocate scarce dray/warehouse capacity, and how to avoid turning schedule noise into a downstream breakdown.
The paradox in one line
Diversions don’t just delay cargo—they re-time it. When many sailings take longer routes, miss weekly “windows,” and then snap back into the network, their arrival patterns become synchronized. That synchronization is what causes the “nothing arrives, then everything arrives” effect.
Why arrival compression happens (simple mechanics)
You don’t need a complex model to understand the pattern. Arrival compression is usually a combination of five forces:
• Longer voyages create wider ETA variance. The longer the route, the more weather, port time, and network friction can compound into unpredictable ETAs. (....)