Operational impact: Vessel transits through the Strait of Hormuz have plummeted over the past week, threatening the flow of oil and petrochemical cargoes on the world’s most strategically important energy chokepoint. According to shipping data from Clarksons, the seven-day moving average of crude tanker transits has fallen to roughly two vessels per day, down from about six a week ago. Total shipping transits have followed the same trajectory, dropping from around 36 vessels last week to about 15, [Splash247] reported.
The crisis escalated after Iran’s Islamic Revolutionary Guard Corps claimed two unidentified oil tankers exploded and were immobilised while attempting to use the waterway’s southern passage. The IRGC said the vessels had entered what it described as an unsafe or mined route under US pressure, but provided no names, flags, casualty details or evidence. The incident has not been independently verified, [Splash247] noted.
Meanwhile, the UK Maritime Trade Operations (UKMTO) issued an alert reporting a vessel on fire approximately eight nautical miles northwest of Kumzar, Oman. UKMTO said military authorities had supplied the information but stressed that the cause of the blaze remained unverified.
Escalating military actions
Iran warned that Hormuz would remain unsafe for petrochemical cargoes and “not even a single drop” of oil or gas while US military operations continued. Washington responded with a ninth consecutive day of strikes on Iran. US Central Command said its latest wave was intended to reduce Tehran’s ability to attack merchant ships operating in the strait’s shipping lanes, [Splash247] reported.
Traffic data snapshot
| Metric | 7-day average one week ago | Current 7-day average | Change |
|---|---|---|---|
| Crude tanker transits per day | ~6 | ~2 | -67% |
| Total shipping transits per day | ~36 | ~15 | -58% |
Source: Clarksons, as cited by Splash247
Implications for shippers and operators
The sharp decline in transits directly impacts the flow of crude oil, liquefied petroleum gas, and other petrochemicals from Persian Gulf producers. For tanker operators and commodity traders, the reduced traffic signals heightened war risk premiums and potential rerouting around the Arabian Peninsula via the Bab el-Mandeb strait, adding significant voyage time and cost. Freight forwarders and logistics managers should expect delays in scheduled cargoes and prepare for possible container vessel disruptions if the situation broadens. The lack of independent verification of the reported tanker explosions leaves the industry in a cautious wait-and-see mode.
Watch list
- Any further UKMTO or naval advisories regarding safe passage in the strait.
- US Central Command updates on strikes and their impact on Iranian naval capabilities.
- Claims from Iran about additional incidents or changes to waterway safety.
- Lloyd's of London and insurance market adjustments to war risk premiums for the region.
Given that 20% of the world's oil passes through Hormuz, continued reduction in transit numbers could trigger oil price spikes and supply disruptions. Logistics firms should activate contingency routing plans and monitor real-time tracking of vessels approaching the strait.
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