Credits: NASA.
Friday March 27, 2026, Iranian authorities announced that the Strait of Hormuz was closed to ships coming from ports linked to “the enemy” or headed toward them. The wording carries heavy implications, but it does not by itself prove a total halt to navigation. What is now at stake is more precise: figuring out how this ban is enforced, which ships continue to pass, and why Paris is following this issue so closely.
A Strong Iranian Announcement, But Its Operational Scope Remains Partly Unclear
The first established fact is political. On Friday, Tehran announced a restriction on ships linked to ports associated with “the enemy.” This measure comes in the context of the military escalation with Israel and the United States. It tightens a sequence that began in late February. During this period, Iran has sought to control, slow, or discourage traffic through the strait.
But the wording matters. Speaking of a closure is not enough to prove a uniform blockade of all ships, at all hours, in both directions. For several days now, available evidence has described traffic that is extremely degraded and selective. Moreover, this traffic is under heavy constraints. In addition, passages are granted only to certain vessels.
Data reported by AFP, Kpler, and Lloyd’s List in recent days show that a limited number of cargo ships, tankers, and LNG carriers did continue to cross Hormuz, far below the usual pace. On March 23, traffic was still described as “highly disrupted.” On March 13, Lloyd’s List Intelligence reported only 77 transits since the start of the month, compared with 1,229 over the same period in 2025. In other words, the question is no longer just “is the strait open or closed?” but “who is still allowed to pass, under what conditions, and under whose protection?”
Total Closure, Selective Screening, Quasi-Blockade: The Difference Is Decisive
Legally and commercially, these scenarios are not equivalent. A total closure would mean a general inability to transit, with an almost complete interruption of merchant traffic. Selective screening, on the other hand, still allows passages, but only with authorization, a mandatory route, or a display of neutrality. In between, a quasi-blockade describes a situation where circulation is not zero, but is hindered enough to send risk, delays, and costs soaring.
That third hypothesis appears, at this stage, to be the most consistent with the available information. In recent days, AFP reported that ships still passing through Hormuz seemed to be taking an Iran-approved route, close to the Iranian coast and Larak Island. Lloyd’s List even referred to an unofficial system of “approved ships.” Analysts have described vessels using their AIS messages to signal a form of political neutrality. Those messages also indicate a distance from Western or Israeli affiliations.
In other words, Iran seems to be seeking less to announce an absolute void in the strait than to impose its ability to sort traffic. This distinction is essential for shipowners. Because even when a few ships still get through, passage is no longer free in the economic sense: it becomes conditional, more expensive, harder to insure, and exposed to permanent political risk.
The International Maritime Organization, meeting in extraordinary session on March 18 and 19, itself acknowledged the seriousness of the situation by calling for a safe maritime framework to evacuate merchant ships stranded in the Gulf region. Such a request would make little sense if traffic were normal. But it does not prove that every ship is currently immobilized.
Why The Strait of Hormuz Remains a Global Energy Chokepoint
If the Iranian announcement is drawing so much attention, it is because Hormuz remains one of the world’s main energy bottlenecks. According to the U.S. Energy Information Administration, around 20 million barrels per day passed through it in 2024. That represents the equivalent of about 20% of global petroleum liquids consumption. The agency adds that in 2024, the strait also handled about one-fifth of global liquefied natural gas trade, mainly from Qatar.
This weight makes the area strategically important far beyond the immediate coastal states. Still according to the EIA, more than a quarter of global seaborne oil trade passes through Hormuz, and Asia is by far the main destination region. China, India, Japan, and South Korea are among the markets most exposed to a prolonged disruption. That does not mean Europe would be safe: even with a different supply dependence, it would mechanically suffer a shock in prices, insurance, and availability across energy markets.
There are a few bypass options, notably through Saudi or Emirati pipelines. But they only make up for part of the usual volumes. In plain terms, even a selective and incomplete closure can seriously disrupt the global logistics chain. That is why it would be excessive to announce an immediate, definitive “oil shock.” However, it is just as misleading to downplay the event on the grounds that a few ships are still getting through.
Why France Is Following The Case So Closely
For Paris, the issue is diplomatic, security-related, and economic all at once. France has already taken a position in a joint statement with Germany, Italy, Japan, the Netherlands, and the United Kingdom. Published on March 19, it condemns what it describes as a de facto closure of the strait by Iranian forces. It also recalls that freedom of navigation is a fundamental principle of international law.
This line matters, but it does not amount to an automatic military commitment. In another official statement released through the French diplomatic network, Minister Jean-Noël Barrot explicitly laid out a position. He stated that France was not a party to the conflict. Moreover, it would not take part, in the current context, in operations to open or free the strait. France’s position is therefore to hold together two imperatives: defend freedom of navigation while avoiding the appearance of being a co-belligerent in a widening war.
For France, the immediate risk is not only a physical interruption of cargoes bound for its market. It is also financial and industrial: soaring insurance premiums, strain on maritime transport, higher oil and LNG prices, and broader weakening of already exposed European partners. Added to that is a crucial political factor. Hormuz now concentrates the question of Western allies’ involvement. The issue is how far they are prepared to go to secure a commercial route. However, it is essential not to turn a protective stance into direct entry into the conflict.
At this stage, no more specific French response was documented in official sources. In fact, on March 27, no clear information on a possible immediate maritime response had yet emerged. This public lack of detail does not mean inaction, but it does require caution about what Paris may do in the coming hours.
What Can Already Be Concluded, And What Still Needs To Be Verified
The strongest point, Friday evening, is this: the Iranian announcement marks a new hardening and confirms that Hormuz has once again become a central lever in the regional confrontation. The second solid point is that traffic has not returned to normal for a long time; it is already reduced, filtered, and heavily disrupted. The third is that the strait has global importance, so any restriction, even partial, becomes a major issue. As a result, this directly concerns France and Europe.
However, several unknowns remain. The exact scope of the measure announced on March 27 still needs to be documented ship by ship. The number of immediate diversions triggered by this new declaration has not yet been firmly established. And the duration of the restriction, as well as its concrete enforcement method, remain dependent on extremely unstable military and diplomatic power dynamics.
That is why two symmetrical mistakes should be avoided: announcing a total blockade as if it were already proven, or reducing the Iranian announcement to a mere verbal posture. Between the two, a reality is emerging clearly: in Hormuz, even without absolute closure, free commercial movement already has little that is normal about it. And for Paris as well as for Europeans, that is enough to make the strait an immediate test of security, energy, and diplomacy.
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