The world’s biggest container shipping companies are revising their sailing schedules as the U.S. and Israel’s war with Iran threatens to disrupt ocean freight in the Persian Gulf region — a vital supply-chain hub for dozens of big American and European manufacturers.

Some carriers are canceling bookings temporarily, skipping some port calls, warning of delays and implementing surcharges to transport containers through the conflict zone. 

Here’s a rundown of the top six as of 4 p.m. London time on March 2:

MSC

The No. 1 container line said on March 1 it’s suspending all bookings for global cargo to the Middle East “until further notice.” The Geneva-based company will keep monitoring the situation and “is working with relevant authorities to ensure the safety of its operations.” Bookings will resume when the security situation improves, it said.

Maersk

The Copenhagen-based company said March 2 it’s suspending refrigerated and dangerous shipments into and out of the United Arab Emirates, Oman, Iraq, Kuwait, Qatar, Bahrain and Saudi Arabia until further notice. Also effective immediately is the suspension of all new bookings between the Indian subcontinent and several Gulf states. Maersk previously said it’ll avoid the Strait of Hormuz and suspended Red Sea transits. Its shares surged on March 2 to the highest since 2022. 

CMA CGM

On March 2, the Marseille, France-based carrier said it’s suspending hazardous cargo bookings immediately to Iraq, Bahrain, Kuwait, Yemen, Qatar, Oman, the UAE, Saudi Arabia, Jordan, Egypt’s Port of Ain Sokhna, Djibouti, Sudan and Eritrea. CMA CGM said March 1 it’s stopped refrigerated cargo bookings in the Gulf region, and it also suspended trips through the Suez Canal. It imposed an “emergency conflict surcharge” of $2,000 per 20-foot container.

Cosco

China’s biggest carrier said on March 1 vessels that entered the Gulf and completed operations there “have been instructed to proceed to safe waters to hover or anchor.” Ships headed to the region were advised to “prioritize navigational safety, with measures including speed reduction, proceeding to safe waters, or awaiting further instructions at designated sheltered anchorages.”

Hapag-Lloyd

The Hamburg, Germany-based firm joined Maersk in stopping Hormuz crossings and rerouting ships away from the Red Sea. As of March 2, Hapag-Lloyd said there were “no alternative discharge ports have been designated at this stage” and “delivery timelines may therefore be extended.” The company also instituted a “war risk surcharge” of $1,500 per 20-foot container. 

Ocean Network Express

The Singapore-based company said on March 2 it would immediately and temporarily “suspend acceptance of new bookings for cargo moving both to and from the Persian Gulf until further notice.” For goods that are currently in transit or planned, “we are closely assessing the situation voyage by voyage,” it said.