What are double sailings and why do they occur?

Double sailings occur when two vessel departures on a weekly liner service depart within the same week, typically caused by vessel delays that bunch with regularly scheduled sailings. In this case, typhoon-induced delays in Asian ports caused vessels originally scheduled for Q3 to cascade into October and November loading windows, creating these double sailings at historically unprecedented levels.

How did this affect capacity during Golden Week 2024?

Despite carriers' traditional strategy of reducing capacity 6-21% during Golden Week, deployed capacity actually increased 4-18% this year across major routes. The Asia-US west coast route deployed 393,000 teu in weekly capacity compared to the typical sub-300,000 teu baseline. This counterintuitive increase was entirely driven by double sailings, not by carriers abandoning capacity reduction strategies.

What are the operational implications for shippers?

Schedule reliability remains severely compromised despite apparently sufficient overall capacity. Metro Shipping noted that while 95% of scheduled sailings were expected to operate post-Golden Week, actual conditions vary significantly between trade lanes. Carriers' schedule adjustments, disrupted vessel rotations, and ongoing congestion continue to make planning difficult for forwarders and logistics providers.

Will carriers' capacity management strategies return to normal?

According to Sea-Intelligence analysis, carriers have not abandoned their seasonal capacity reduction strategies; their networks are simply too congested with bunched vessels to execute them effectively. Once Asian port congestion clears and vessel schedules normalize, traditional Golden Week blanking patterns should resume, though structural reliability improvements remain uncertain.

Which trade routes experienced the most disruption?

The Asia-Mediterranean route showed the most dramatic year-over-year increase at 18% capacity growth during Golden Week, compared to historical 21% reductions. Asia-US east coast routes increased 15%, while Asia-US west coast and Asia-North Europe routes each increased 4%, indicating regional variation in congestion severity.

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The signal

Port congestion in Asia, exacerbated by typhoon disruptions, has triggered unprecedented levels of vessel bunching and consecutive double sailings that inadvertently negated carriers' traditional Golden Week capacity reduction strategy.

Instead of executing planned blanked sailings during the Chinese holiday, liner services experienced capacity increases of 4% to 18% across major east-west trade lanes, with double sailings reaching historically high levels in October and November.

This phenomenon masks a deeper operational crisis: carriers are unable to execute their normal capacity management tactics because their networks remain severely congested with cascading delayed vessels, creating artificial capacity inflations that obscure underlying schedule unreliability issues affecting shipper planning.

#schedule-reliability

#asia-europe-trade

#transpacific-route

#capacity-management

#supply-chain-disruption

#freight-planning

Frequently Asked Questions

What This Means for Your Supply Chain

Simulation Suggestion

this month

What if Asian port congestion persists through Q4?

Assume Asian loading port congestion remains at current levels with vessel dwell times extending 3-5 additional days through December. Simulate cascading vessel delays into Q1 next year, quantifying impact on transpacific and Asia-Europe service reliability, landed costs, and shipper inventory requirements.

Run this scenario

Simulation Suggestion

immediate

What if typhoon season extends or intensifies through November?

Scenario: Additional typhoons occur in October-November, prolonging port delays and extending vessel bunching into year-end peak shipping season. Model supply chain impact including cascading delays into holiday retail peak, inventory availability at destination ports, and rate volatility.

Run this scenario

Simulation Suggestion

strategic

How would normalized scheduling reduce effective capacity availability?

Model scenario where double sailings reverse as congestion clears and vessel schedules normalize post-Q4. Calculate capacity reduction across major lanes as carriers execute blanked sailings in early 2025. Quantify potential rate increases and space availability tightening for shippers.

Run this scenario

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