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Iran Conflict 2026
17AUG

Three ships a day in an 'open' strait

2 min read
15:37UTC

Kpler counted exactly three transits on each of 22, 23 and 24 July. CENTCOM's formal position is that the Strait of Hormuz remains open for transit.

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Key takeaway

Three independent trackers put Hormuz traffic at a fraction of pre-war levels while CENTCOM calls it open.

Kpler, the maritime data provider, recorded exactly three vessel transits through the Strait of Hormuz on each of 22, 23 and 24 July, down from more than 20 a day before 15 July 1. CENTCOM's formal position is that the strait remains "open for transit".

Both statements can be true at once, and the gap between them is the thing worth understanding. Hormuz is 33km wide at its narrowest and carries about a fifth of the world's seaborne oil; transit passage through it is a right in international law that no naval force has formally revoked. Whether a master exercises that right depends on his charterer, his crew and his underwriters, none of whom are bound by CENTCOM's characterisation. Kpler's count includes vessel-level detail, among them the very large crude carrier New Giant carrying about two million barrels of Basrah crude for China 2.

Two other providers reach the same place by different routes. S&P Global counted 40 vessels across 17 to 19 July, about 13 a day, roughly half the previous week's rate. Lloyd's List put tanker and gas-carrier movements specifically at 30 in the week to 20 July against 90 in the week to 13 July, part of the 66% weekly fall we reported on 21 July . Saul Kavonic of MST Marquee, on the record, puts flows at about 15% of pre-war levels 3. Three commercial datasets built for paying clients rather than for public argument agree on direction and on magnitude.

The insurance market reached this conclusion first and has not revisited it. War-risk rates on Hormuz transits were repriced in mid-July, when the broker Marcus Baker of Marsh quoted them against a count of eight vessels a day , and they have held at that level while physical traffic fell to three. Underwriters priced a closure the traffic has since caught up with. The exposure now sits in what has not been priced: a single mine strike or boarding in the Larak-Qeshm corridor, the route vessels use to stay outside CENTCOM's written blockade order, could push mainstream insurers to withdraw cover rather than reprice it, which would close the strait commercially without any government declaring it closed.

Deep Analysis

In plain English

The US military says the Strait of Hormuz, the narrow waterway through which much of the world's oil passes, is "open for transit". But three separate companies that track ship movements say otherwise. Kpler recorded just three ships a day passing through between 22 and 24 July, down from more than 20 a day before 15 July. S&P Global counted about 13 ships a day in a similar recent stretch, roughly half the week before. In practice, almost nobody is sailing through, whatever the official language says, because the insurance cost of doing so has become too high for most shipping companies to accept.

Deep Analysis
Root Causes

"Open for transit" and "commercially viable to transit" are two different claims, and the gap between them is what three trackers are actually measuring. CENTCOM's statement addresses the first, whether the US Navy will contest passage; the P&I clubs, the insurers that underwrite almost all commercial shipping, address the second, and they set premiums based on assessed risk of loss, not on any government's characterisation of the strait's status.

Once those premiums cross a threshold where insurance cost exceeds freight margin, as the current range does for many operators, rational shipowners divert regardless of what CENTCOM says, because the decision is made in a London or Scandinavian underwriting office, not in Washington or Tehran.

What could happen next?
  • Meaning

    A near-90% collapse in daily transits despite an "open" designation shows insurance markets, not naval statements, are setting the real terms of access to Hormuz.

  • Consequence

    Sustained traffic collapse compounds the Cape of Good Hope diversions already under way, adding weeks to voyage times for cargo bound for Europe and Asia.

Sources:Baird Maritime (citing Kpler)·Baird Maritime (citing Kpler)·The National
Mentions:Kpler →S&P Global Platts →Strait of Hormuz →Larak-Qeshm →China →Lloyd's List →Marsh →CENTCOM (US Central Command) →
First Reported In

Update #162 · Munitions, not Iran, halted US bombing

Baird Maritime (citing Kpler)· 26 Jul 2026
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Causes and effects
This Event
Three ships a day in an 'open' strait
Legal openness and physical traffic have separated, and every insurer, charterer and Gulf exporter is pricing the second one.
Led to
Hormuz crossings fall by two thirds
Continues the collapse in Hormuz transits first measured at a 66% weekly fall on 21 July.
Occurred 21 Jul 2026
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Brent clears $87 as Hormuz traffic thins
War-risk premiums Marsh quoted against 17 July's transit count have held at 3-10% of hull value while transits fell further.
Occurred 17 Jul 2026
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Drone hits US gas vessel at Damietta
The Hormuz transit collapse (ID:5346) is why traffic has shifted to the Mediterranean corridor the Damietta drone strike touched.
Occurred 29 Jul 2026
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Hormuz transits rise to an eighth of normal
The 84-transit count measured a partial rebound after the earlier Hormuz traffic collapse.
Occurred 6 Aug 2026
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Different Perspectives
Shipping and insurance underwriters
Shipping and insurance underwriters
Kpler counted five Hormuz transits on 16 August against 31 the previous weekend, while Windward logged four vessels going AIS-dark for up to a month; underwriters price both the attacks and a sanctions register that names their counterparties in unreadable scanned images. Two trackers now measure only the ships that consent to be seen.
China
China
China sits at the end of the payment chain the 14 August designation targets: Iran's shadow banking network exists to convert sanctioned oil sales, much of it to Chinese refiners, into usable funds. Beijing has previously refused to recognise OFAC's jurisdiction over its own entities buying Iranian crude, leaving this designation to test compliance rather than change trade.
Qatar
Qatar
Qatar's foreign ministry denied on 16 August holding any Iranian pilots alive, contradicting Iranian General Mohammad Bagherzadeh's claim that Doha holds three Su-24 aircrew, and said it had recovered only one set of remains. Qatar carries Iran's messages to Washington, and this is a public break with Tehran over a fact only one aircrew inquiry can settle.
Oman
Oman
Oman's shipping-map talks, covering monitoring, environment and maritime services, were publicly decoupled from any Hormuz reopening by Iran's own foreign minister on 17 August. Muscat's mediation channel keeps functioning on the narrow file it was given, while the political decision it hoped to unlock stays with Iran's security council.
Saudi Arabia
Saudi Arabia
Saudi Arabia separately called the recurrence of tanker attacks on Emirati shipping a dangerous escalation, breaking from the UAE's repeated formula. Riyadh speaking in its own name over an attack on another state's vessels signals it reads the pattern differently from Abu Dhabi's flat statements.
United Arab Emirates
United Arab Emirates
The UAE foreign ministry condemned a third ADNOC-linked tanker attack on 15 August in language identical, word for word, to its statement the day before. Three consecutive strikes on Emirati shipping have not moved Abu Dhabi's public wording by a single adjective.