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Ports using contingency anchorages as number of ships waiting for berths grow.
Union leader says restricted night operations amount to a "mini lockout."
No contract talks planned with Pacific Maritime Association Thursday.
Marine terminal officials agree that future contracts will require ongoing collaboration.
Maersk Line CEO Soren Skou told American Shipper container lines need to adapt to permanent overcapacity, and cited Maersk's network management as the primary driver of bumper profits in recent years.
Economist revised forecasts, predicting lower import growth and a second year of declines in exports.