Marine Traffic at the Strait of Hormuz: After the Disruption, a Narrow Channel Opens
marine traffic through the Strait of Hormuz showed signs of a limited rebound in recent days, even as ship-tracking data indicate overall flows remain severely disrupted after the start of the United States and Israel’s war on Iran.
What happens when Marine Traffic is shaped by “permission-based” passage?
Ship-tracking indicators point to a small but growing number of commercial vessels moving through the waterway. Maritime intelligence company Windward said eight vessels, excluding ships flying the Iranian flag, were detected transiting the strait the vessels’ automatic identification systems on Monday. Windward described that tally as “nearly double” the numbers seen in recent days.
Michelle Wiese Bockmann, an analyst at Windward, said a growing number of ships have been rerouting Iran’s territorial waters, suggesting Tehran is allowing “permission-based transits to friendly countries. ” She added that “Western-affiliated vessels won’t voluntarily come into Iranian waters, but likely Chinese, Indian and others will. ”
A separate ship-tracking service, MarineTraffic, recorded nine transits on Monday and Sunday, compared with five over the previous two days. The counts described in the available tracking data underscore the tight conditions for non-Iranian shipping and the narrowness of any near-term improvement.
What if ship-tracking data continue to show only single-digit transits?
Despite the recent uptick, the context remains one of severe disruption. Traffic through the strait has plunged more than 95 percent since the start of the war, the available figures indicate. Daily transits by non-Iranian ships—described as mostly Chinese, Indian and Pakistani-flagged vessels—have dropped into the single digits amid Iranian threats against shipping in the region.
The geopolitical messaging has also remained inconsistent. Tehran has sent mixed signals about the status of the strait. Iranian Minister of Foreign Affairs Abbas Araghchi said on Monday that the strait was “open, but closed to our enemies, ” after a spokesperson for the Islamic Revolutionary Guard Corps earlier this month warned that any ship attempting passage would be set ablaze. That combination—limited passages alongside explicit threats—helps explain why the observed transits remain low and why rerouting decisions appear to concentrate among select flags and relationships.
The disruption has also been linked to sharp price moves. The effective halt of traffic through the waterway has sent oil prices surging above $100 per barrel, an increase of more than 40 percent compared with before the start of the war. While the ship-tracking data suggest a small rise in crossings, the overall level of flow described remains far below normal conditions.
What happens next as military actions target risks to shipping?
In Washington, President Donald Trump said on Tuesday that the United States did not need other countries’ help to unblock shipping traffic, while criticizing NATO partners for rejecting proposals for an international coalition of warships to secure the waterway. Trump made the remarks during a meeting with Irish Prime Minister Michael Martin at the Oval Office.
The U. S. military said late on Tuesday that it had dropped bunker buster bombs on “hardened” Iranian missile sites located near the strait. U. S. Central Command said the Iranian anti-ship cruise missiles in these sites posed a risk to international shipping in the strait.
For markets and operators watching the waterway, the immediate signal from the data is not a full reopening, but a constrained corridor in which a small set of vessels appear able to transit. The next shift in marine traffic will hinge on whether the pattern described by Windward—rerouting through Iran’s territorial waters under implied permission—continues, and whether threats and military actions intensify or ease in ways that alter insurers’, operators’, and crews’ risk tolerance.
