• Only one oil tanker transited the Strait of Hormuz today, a sharp decline from typical daily averages.
  • The vessel Mab 5, Botswana-flagged and under US sanctions, passed through earlier, with additional sanctioned ships moving in ballast.
  • AIS tracking gaps may undercount actual movements, suggesting disruption could be more severe than visible data indicates.

Traffic through the Strait of Hormuz has plummeted to a fraction of its normal levels, with shipping data showing just a single oil tanker passage today. The vessel, the US-sanctioned, Botswana-flagged Mab 5, moved through earlier in the day, according to an analysis of MarineTraffic AIS data. Two other ships—a Panama-flagged bulk carrier and an India-flagged cargo vessel—also entered the Persian Gulf, while an India-flagged sailing vessel exited into the Gulf of Oman.

This stark drop comes despite a recent US-Iran ceasefire announcement, with traffic far below the typical average of about 107 vessels per day. Observers note that AIS tracking gaps mean additional ships could have passed undetected if they turned off signals, implying the disruption might be larger than what's captured in real-time data. "We're seeing a significant thinning of traffic, but the full picture is obscured by reporting limitations," said one analyst familiar with the matter, who spoke on condition of anonymity.

Efforts to stabilize the critical oil chokepoint have hit a snag, as ongoing tensions and selective compliance with sanctions continue to disrupt flows. The Strait of Hormuz remains one of the world's most vital maritime passages, handling a substantial portion of global oil shipments. Past patterns show that traffic often thins dramatically during periods of heightened geopolitical risk, only to partially recover as security arrangements solidify.

In the short term, volatility in transit timing and routing is likely to persist. Sanctioned or ballast-only vessels, like those noted in recent movements, may continue to pass through under specific conditions, while broader commercial traffic remains hesitant. Without a more robust normalization of security protocols, shipping companies could face prolonged uncertainty, impacting global oil prices and insurance premiums.

Market participants are closely watching for any new ceasefire terms or adjustments in Iranian maritime security actions, which could directly influence Hormuz traffic dynamics. Attempts to reach out to relevant shipping authorities for comment were not immediately successful. As one industry insider put it, "The ceasefire was a step, but the real test is whether it translates into reliable passage for all vessels, not just a select few."

This article was updated to clarify that AIS data gaps may affect the accuracy of transit counts.