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Rickmers, which manages the ship for Maersk said Iranian navy fired "warning shots" at Marshall Islands-flagged Maersk Tigris.
Members of the Transpacific Stabilization Agreement are recommending two $600 general rate increases and a $400 peak season surcharge.
The Commerce Department on Tuesday reported U.S. exports of goods and services increased by $1.6 billion, or 0.9 percent, in March.
Port of Dammam terminal operator International Ports Services set a record for the first four months of 2015.
Rates were down again in April 2015 after falling 1.6% in March 2015, according to the latest Cass Intermodal Price Index.
Investment firm Avondale Partners expects truckload pricing to increase 4%-9% in 2015.