Since late February 2026, the Strait of Hormuz has been largely inaccessible to commercial shipping, resulting in an estimated 1,550 vessels, carrying around 20,000 seafarers, being unable to transit or opting to anchor in the Arabian Gulf, Gulf of Oman, and surrounding areas. This unprecedented situation has led to a substantial number of ships remaining inactive for prolonged periods.
The primary concern arising from this extended idling is the degradation of bunker fuel quality. Stagnant fuel in tanks can lead to microbial growth, water contamination, and sediment formation, which can severely impact engine performance and reliability when vessels eventually resume operations. Proper fuel management, including regular testing, treatment, and potential fuel transfers, becomes critical to prevent costly machinery breakdowns.
For freight forwarders and shippers, this situation translates into potential delays and increased costs. Vessels facing fuel quality issues may require extensive maintenance, leading to off-hire periods. The uncertainty surrounding vessel availability and the need for specialized fuel management services could disrupt supply chains and necessitate contingency planning for cargo rerouting or alternative transport modes. Furthermore, the operational expenses for carriers will likely rise due to fuel treatment, testing, and potential repairs, which could be passed on to customers through surcharges or higher freight rates.
As the closure persists, the focus will remain on implementing robust fuel quality management protocols for the idled fleet to mitigate future operational risks and ensure a smoother return to service once transit through the Strait of Hormuz is restored.