Friday March 27, 2026, Iranian authorities announced that the Strait of Hormuz was closed to ships coming from or bound for ports linked to the “enemy.” The wording carries heavy consequences, but it does not by itself prove a total halt to navigation. What’s now at stake is more precise: how this ban is enforced, which ships continue to pass, and why Paris is watching this issue so closely.
A Strong Iranian Announcement, But Its Operational Scope Remains Partially 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 hardens a sequence that began in late February. During that period, Iran sought to control, slow down, or deter traffic through the strait.
But the words deserve attention. Saying it is closed is not enough to prove a uniform blockade of all ships, at all hours, in both directions. For several days, available elements have described traffic as extremely degraded and selective. Moreover, that traffic is under heavy constraint. In addition, passages are granted only to certain vessels.
Data relayed by AFP, Kpler and Lloyd’s List in recent days indeed show that a reduced number of cargo ships, tankers and LNG carriers continued to transit Hormuz, far below the usual pace. On March 23, traffic was still described as “heavily disrupted.” On March 13, Lloyd’s List Intelligence reported only 77 transits since the start of the month, versus 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 what protection?”
Total Closure, Selective Screening, Quasi-Blockade: The Difference Is Decisive
Legally and commercially, the scenarios are not equivalent. A total closure would mean a general impossibility to transit, with an almost complete interruption of merchant traffic. Selective screening, by contrast, allows passages to continue but only with authorization, imposed routes, or displays of neutrality. Between the two, a quasi-blockade corresponds to a situation where traffic is not zero but is impeded enough to explode risk, delays and costs.
This third hypothesis appears, at this stage, most consistent with available information. In recent days, AFP reported that ships still passing through Hormuz seemed to follow a route approved by Iran, as close as possible to the Iranian coast and Larak Island. Lloyd’s List even mentioned an unofficial system of “approved vessels.” Analysts described ships using their AIS messages to signal a form of political neutrality. Those messages also indicate distance from Western or Israeli affiliations.
In other words, Iran appears less intent on announcing an absolute vacuum in the strait than on imposing its ability to sort traffic. This nuance is essential for shipowners. Because even when a few vessels still pass, the passage is no longer free in the economic sense: it becomes conditional, more costly, less insurable and exposed to a constant political risk.
The International Maritime Organization, convened in an extraordinary session on March 18 and 19, itself acknowledged the gravity of the situation by calling for a safe maritime framework to evacuate merchant ships trapped in the Gulf region. Such a demand would make little sense if traffic were normal. It does not, however, prove that every ship is immobilized today.
Why The Strait Of Hormuz Remains A Global Energy Choke Point
If the Iranian announcement draws so much attention, it’s because Hormuz remains one of the planet’s main energy choke points. According to the U.S. Energy Information Administration, about 20 million barrels per day transited there in 2024. That represents roughly 20% of global liquid fuel consumption. The agency adds that in 2024 the strait also carried about one-fifth of global liquefied natural gas trade, mainly from Qatar.
This weight makes the area strategically important well beyond immediate littoral states. Also according to the EIA, more than a quarter of global seaborne oil trade passes through Hormuz, and Asia is by far the primary destination. China, India, Japan and South Korea are among the markets most exposed to a prolonged disruption. That does not mean Europe would be immune: even with different supply dependencies, it would mechanically suffer a shock in prices, insurance and availability across energy markets.
There are some bypass capacities, notably via Saudi or Emirati pipelines. But they only compensate for part of the usual volumes. In short, even a selective, partial closure can strongly disrupt the global logistics chain. That’s why it would be excessive to announce an immediate, definitive “oil shock.” However, it is equally misleading to minimize the event just because some ships are still passing.
Why France Is Watching The Issue So Closely
For Paris, the stakes are diplomatic, security-related and economic. France already took 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 stance is important, but it does not equate to an automatic military commitment. In another official remark distributed through the French diplomatic network, Minister Jean-Noël Barrot explicitly stated a position. He said France was not a party to the conflict. Moreover, it would not take part, in the current context, in operations to open or liberate the strait. The French position is therefore to hold two imperatives together: defend freedom of navigation and avoid appearing as a co-belligerent in an expanding war.
For France, the immediate risk is not only a physical interruption of cargoes destined for its market. It is also financial and industrial: soaring insurance premiums, strains on maritime transport, rising oil and LNG prices, and broader weakening of European partners already exposed. Added to that is a crucial political factor. Hormuz now concentrates the question of Western allies’ engagement. It’s about how far they’re willing to go to secure a trade route. However, it’s essential not to turn a protective posture into direct entry into the conflict.
At this stage, no more precise French reaction was documented in official sources. Indeed, on March 27, no clear information on an immediate maritime response had yet appeared. This public lack of detail does not mean inaction, but it requires caution about what Paris might do in the coming hours.
What Can Already Be Concluded, And What Remains To Be Verified
The firmest point, Friday evening, is this: the Iranian announcement marks a new hardening and confirms that Hormuz has become again a central lever of the regional confrontation. The second solid point is that traffic has not returned to normal for a long time; it is already scarce, filtered and heavily disrupted. The third point is that the strait has global importance, so any restriction, even partial, becomes a major issue. Consequently, this directly concerns France and Europe.
Several unknowns remain, however. The exact scope of the measure announced on March 27 remains to be documented ship by ship. The number of immediate reroutings caused by this new declaration is not yet firmly established. And the duration of the restriction, as well as its concrete mode of application, depend on extremely unstable military and diplomatic balances.
That’s why two symmetrical errors should be avoided: announcing a total blockade as an already proven fact, or reducing the Iranian announcement to mere verbal posturing. Between the two, a reality is emerging clearly: in Hormuz, even without an absolute closure, commercial free passage already bears little resemblance to the ordinary. And for Paris as for Europeans, that is enough to make the strait an immediate test of security, energy and diplomacy.