Shipping on High Alert in Mideast After US Strikes on Iran

Energy Connect Story Thumbnail

The shipping industry was placed on high alert on Sunday with warnings that Tehran could retaliate against commercial vessels following after US airstrikes against Iran’s nuclear facilities.

Greece, home to the oil oil-transportation capacity than any other nation, cautioned its ship owners to think again if considering entering the Persian Gulf in the wake of US airstrikes. Vessels planning to sail through the Strait of Hormuz, the waterway that sits at the mouth of the region, should “reassess passage” until the situation normalizes, according to a circular, seen by Bloomberg that its shipping ministry sent to vessel owners. It advised waiting in nearby safe ports.

Naval forces in the area warned that ships, especially US-linked ones, could be at heightened risk. The actions of the maritime industry — and its risk tolerance — will be a critical detail in the wake of the strikes because of Iran’s proximity to the strait of Hormuz, a conduit for a fifth of the world’s oil and an unavoidable searoute into the Persian Gulf.

Athens’s warning is the latest sign of pressure on shipping markets as attacks on Iran escalate. Tanker earnings already soared by almost 90% since Israel first started conducting airstrikes on June 13. As one of the world’s largest shipowning nations, advice to Greece’s vessel owners would have a major impact on commodity transportation markets, especially oil. 

There’s every chance ignore the advice because the Persian Gulf is too-important a region for them to avoid and rates can always rise to compensate for the risk of sailing in the region. Shipowners that do decide to transit Hormuz should adopt the highest security level available and maintain the maximum possible distance from Iranian waters, Greece’s ministry added.

In Sunday’s notice, the Greek ministry cited concern around a possible closure of Hormuz as a reason behind its message. 

Officials at three Greek tanker companies said they were still assessing the situation. One did indicate he might still allow his tankers to enter the region, while another said their ships would likely stay away.

Calls and emails to the ministry weren’t immediately responded to outside usual working hours. 

Bigger Risk

Naval groups are also warning of greater risk. 

On Sunday, the Joint Maritime Information Center, a liaison between navies and merchant shipping in the region, said that the US airstrikes mean US-linked ships sailing through the Red Sea and Gulf of Aden face a high risk of attack. 

Yemen’s Houthi rebel group issued fresh threats against US commercial and naval ships earlier in the day. There had been a ceasefire between the US and the Houthis in early May, geared toward limiting the group’s attacks on the US navy. US-linked ships should consider re-routing, the JMIC said in its update.

Separately, the European Union’s naval force in the region raised its threat assessment for US-linked vessels as a result of the strikes. It now sees a severe threat to ships linked to the US and Israel and a low risk for all other ships. 

“This does not exclude the possibility of all merchant vessels being targeted in the future,” it said in an update published by France’s MICA Center, which helps co-ordinate global maritime security. 

(Updates with additional information from first paragraph.)

©2025 Bloomberg L.P.

KEEPING THE ENERGY INDUSTRY CONNECTED

Subscribe to our newsletter and get the best of Energy Connects directly to your inbox each week.

Back To Top