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"Global schedule reliability was down 33.5 percentage points compared to January 2020, and is now the lowest figure ever recorded by Sea-Intelligence [Maritime Analysis]," the maritime consulting firm said in its Global Liner Performance report.

Reliability in the eastbound trans-Pacific trades in January plummeted to 13.8 per cent to the US West Coast, the second-lowest on record for the trade, and 21.5 per cent to the East Coast, the lowest ever on that lane, according to Sea-Intelligence.

The late vessel arrivals help explain why US ports have been struggling since last summer to handle near-record volumes of US imports from Asia and why port congestion will likely linger through the spring months, according to IHS Media.

Sea-Intelligence noted that the number of days vessels are delayed and must sit at anchor while awaiting berthing space continued to increase, an ominous sign for ports, especially Los Angeles-Long Beach, where vessels awaiting berthing space is a major contributor to congestion at the largest US port complex. The ports of Los Angeles and Long Beach handle about 50 per cent of US imports from Asia, according to PIERS, a {非本站网址} sister product within IHS Markit.

On the West Coast, the average delay for late vessel arrivals in January increased to 10.28 days, up from 8.01 days the previous month and 3.46 days in January 2020. "This was the second-highest figure on the trade lane," Sea-Intelligence said.

On the East Coast, the average delay for late vessel arrivals increased to 5.53 days, up from 4.92 days in December and 3.63 days during the same month last year.

Late vessel departures from Asian load ports, and late vessel arrivals at US ports, have triggered a series of logistics issues throughout the transportation supply chain. Vessel bunching at the ports, congested marine terminals, excessive container dwell times on the terminals, long truck lines at the gates, and equipment shortages have occurred to varying degrees at some US gateways.