Trump Says Hormuz Is Open. Iran Says It's Closed. The Shipping Data Tells A Stranger Story
Is the Strait of Hormuz actually open?
Ships Are Still Crossing Hormuz — But More Than Six In Ten Are Hiding How
Donald Trump says the Strait of Hormuz is open and operating. Iran insists it remains closed unless vessels comply with Tehran's conditions. The ships actually moving through one of the world's most important waterways suggest something stranger: Hormuz is functioning, but it is no longer functioning normally.
Commercial vessels are still crossing. Yet traffic remains severely depressed, large numbers of ships are concealing their movements, and among vessels openly declaring their routes, dramatically more have followed the corridor preferred by Iran than the US-backed route closer to Oman. Rather than proving that either Washington or Tehran fully controls Hormuz, the data increasingly points towards a fragmented waterway governed by military risk, selective access and deliberate invisibility.
Trump Says The Strait Is Open
Trump's position is straightforward. On August 18, he said the Strait of Hormuz was "open and operating", while also declaring that the American naval blockade remained in force and that water mines had been removed or destroyed.
That is a powerful political message for Washington. The Strait of Hormuz was one of the world's most important energy arteries before the conflict, carrying roughly a fifth of global oil and liquefied natural gas flows, so demonstrating that Iran cannot shut it indefinitely matters far beyond the Gulf.
But "open" normally implies something more than the physical possibility of getting a ship from one side to the other. It implies predictable navigation, commercially viable risk, normal insurance conditions and confidence that vessels can transit without becoming part of a military confrontation.
That is not what the available shipping data shows.
Iran's Version Is Different
Tehran argues that the waterway remains under Iranian control and that vessels considered hostile cannot simply pass as they did before the war. Iranian officials have simultaneously said that non-hostile shipping can receive safe passage when coordinated with Iranian authorities.
Iran's position therefore contains an important distinction. When Tehran describes Hormuz as closed, it does not necessarily mean that no vessel can physically cross the strait. It means Iran claims the authority to determine which traffic is acceptable and under what conditions.
Senior Iranian negotiator Mohammad Baqer Qalibaf has said reopening depends on Washington ending its blockade of Iranian ports, lifting oil sanctions, releasing frozen Iranian assets and ending military threats and operations. Those demands remain unresolved.
That leaves two governments making apparently incompatible claims while commercial shipping attempts to survive between them.
The Shipping Data Changes The Picture
Between August 1 and August 19, maritime intelligence data recorded 236 ships passing through the Strait of Hormuz, including tankers, gas carriers, chemical vessels and dry-cargo ships. That immediately undermines the simplest interpretation of the word "closed": ships clearly are getting through.
But how they are crossing is far more revealing.
Of those 236 vessels, 83 openly used the northern route associated with Iran. Only three publicly used the southern route closer to Oman that Washington has promoted for commercial traffic under US naval protection. Another two followed the traditional pre-war central route.
Then there were the other 148 ships.
They crossed using routes classified as dark or unknown.
That means more than six out of every ten vessels recorded crossing Hormuz during the period were not travelling through a route that could be cleanly identified using conventional vessel-tracking information. Ships may disable or manipulate Automatic Identification System transmissions, disappear from tracking temporarily or otherwise leave insufficient information to determine precisely which corridor they followed.
That is not normal shipping.
It is shipping behaving as though visibility itself has become dangerous.
Oil Tankers Are Even More Mysterious
The picture becomes more striking when the data is narrowed to vessels carrying crude oil, liquefied petroleum gas and liquefied natural gas.
Between August 1 and August 19, 112 such vessels were recorded entering or leaving through Hormuz. Twenty-one openly followed the Iranian route. Only two publicly followed the Omani route.
The other 89 — more than 80% of the oil and gas traffic measured during the period — used dark or otherwise unclassified routes.
It is impossible from that data alone to establish exactly where every one of those ships travelled. A dark vessel could be closer to Iran, closer to Oman or using another navigational pattern entirely.
But the behaviour itself matters.
Ships transporting extraordinarily valuable cargoes through one of the planet's most militarised waterways are choosing, in enormous numbers, not to broadcast enough information for outsiders to reconstruct their precise movements.
That suggests the dispute over who "controls" Hormuz may be missing the most important development.
Commercial operators increasingly appear to be designing their behaviour around avoiding both sides.
The Openly Visible Traffic Favours Iran
There is another uncomfortable detail for Washington.
Among ships whose routes can actually be identified, far more are publicly using the Iranian corridor than the US-backed Omani corridor. For overall shipping between August 1 and August 19, 83 vessels openly used the Iranian route compared with only three using the Omani route.
That does not prove Iran controls every ship in the strait. The enormous number of dark transits makes any such conclusion impossible.
But it does indicate that the shipping industry has not overwhelmingly embraced the alternative corridor associated with American protection.
For operators managing ships worth tens or hundreds of millions of dollars, carrying potentially even more valuable cargo and employing crews whose lives are at risk, rhetoric matters less than threat assessment.
The route chosen by a vessel is ultimately an economic and security decision.
The visible decisions suggest Iranian power over the operating environment has not disappeared.
Nine Commodity Ships A Day Is Not Normality
The latest daily figures reinforce the same conclusion.
Only nine tracked commodity vessels passed through Hormuz on Tuesday, August 18. Nine were recorded again on Wednesday, August 19. Some additional ships may have crossed without active transponders, meaning the true number could be higher, but publicly tracked traffic remains unusually low.
So Trump can legitimately point out that vessels are moving.
Iran can legitimately point out that normal freedom of navigation has not returned.
Both statements can coexist because the argument increasingly revolves around two different definitions of "open".
Washington appears to define openness as the ability to get commercial ships through despite Iranian threats.
Tehran's definition is closer to sovereignty and permission: ships are moving because Iran permits some of them to move, while restricting vessels it regards as hostile.
The shipping market provides a third definition.
A genuinely open Strait of Hormuz would be one in which companies were not routinely hiding where their ships were.
The Danger Has Not Disappeared
The extraordinary behaviour of commercial vessels also makes more sense when the security record is considered.
As of August 11, the International Maritime Organization had documented 65 confirmed maritime incidents across the wider Middle Eastern crisis and 17 seafarer fatalities. Its incident record includes damaged and abandoned vessels around the Strait of Hormuz and surrounding waters.
The US Maritime Administration continues to warn that the threat to commercial vessels in the Persian Gulf, Strait of Hormuz and Gulf of Oman remains high. Its advisory specifically identifies missiles, armed drones and unmanned surface vessels among the threats now facing merchant shipping.
On August 18, another vessel sailing out through Hormuz was reported struck by an unidentified projectile, damaging its engine room and causing a crew casualty. Omani authorities assisted the crew.
Against that background, shutting down a transponder stops looking like an obscure technical detail.
It becomes an act of survival.
Hormuz Has Splintered Into Rival Systems
Before the war, ships largely followed established traffic separation schemes through the strait. Their route was dictated primarily by destination, charter arrangements and navigational safety rather than by which military power they feared antagonising.
The conflict has changed that.
A northern corridor has emerged close to Iran, around areas including Larak and Qeshm islands. A southern corridor closer to Oman represents the alternative favoured by Washington and protected by American military power. Around them sits a much larger shadow system of vessels whose actual routes cannot reliably be reconstructed from normal tracking data.
Hormuz therefore increasingly resembles several waterways occupying the same narrow piece of geography.
There is an Iranian route.
There is a US-backed route.
And there is the dark route used by operators trying to reveal as little as possible about which system they have chosen.
That third category is now the largest.
Nobody Has Achieved Full Control
This is why declaring either side the uncontested winner would go beyond the evidence.
Iran cannot credibly describe Hormuz as physically sealed when hundreds of vessels have crossed during August.
Washington cannot credibly describe conditions as normal when tracked commodity traffic is in single digits on some days, attacks continue and a majority of ships passing through the strait are concealing or obscuring their routes.
Military control is also different from commercial control.
The United States may possess overwhelming naval and air power around the region, but shipping companies do not need to believe Iran could defeat the US Navy to change their behaviour. They only need to believe Iran retains enough missiles, drones, mines, boats or surveillance capability to make an individual voyage dangerously expensive.
Iran does not need absolute control of every mile of water.
It needs credible denial capability.
That distinction may explain why the visible shipping patterns look so different from the political declarations being made in Washington.
The Economic Consequence Is Already Visible
Hormuz matters because this is not merely a dispute over maritime symbolism.
Oil prices rose to their highest level in roughly three weeks on August 20 as markets continued pricing the risk surrounding Middle Eastern supply. Brent crude for October reached around $94 a barrel during trading, while shipping through Hormuz remained well below its pre-war pattern.
Every vessel that delays, changes route, requires military protection, pays higher insurance costs or disappears from public tracking introduces another layer of uncertainty into the world's energy system.
That uncertainty can spread well beyond oil.
Higher energy prices feed transport, manufacturing, food production, aviation and consumer inflation. Governments then face pressure over fuel prices and household costs while central banks confront another potential inflationary shock.
The argument over who controls a narrow stretch of water between Iran and Oman can therefore end up influencing mortgage rates, industrial costs and household budgets thousands of miles away.
What Happens Next
The decisive test will not be another statement from Trump or another declaration from Tehran.
It will be whether normal commercial shipping returns.
Watch the number of daily transits. Watch whether vessels begin leaving their AIS systems active throughout their crossings. Watch whether the enormous dark-routing category begins shrinking. Most importantly, watch whether shipping companies start openly choosing the US-backed corridor without appearing to fear Iranian retaliation.
Until those things happen, declaring Hormuz simply "open" risks describing a military achievement rather than commercial reality.
Declaring it completely "closed" is equally difficult to reconcile with hundreds of vessels getting through.
The stranger truth sits between them.
The Strait of Hormuz is operating under a new kind of contested control in which American military power, Iranian coercive capability and commercial fear overlap inside the same narrow channel. The most revealing evidence is not what either government says about the waterway. It is that so many of the ships using it apparently do not want anyone to see exactly how they got through.
