Skip to content
Welcome, thoughtbot's Giant Robots listeners!Start here
Autonomous Systems: Land & Sea
13JUN

Seven Ships Cross Hormuz, No Oil Tankers

3 min read
11:07UTC

IRGC / Lloyd's List Intelligence

TechnologyDeveloping
Key takeaway

Seven ships in 24 hours is a checkpoint, not a reopening.

Seven ships transited the Strait of Hormuz on ceasefire Day 3. None were oil tankers. 325 oil tankers and more than 600 vessels remain stranded inside the Persian Gulf. Iran's toll system had reached 20 transits per day before the ceasefire; seven is a regression, not a recovery. The pre-war baseline of 135 per day illustrates the distance to normalisation.

Iran's inspection and ban regime transforms the strait from an international waterway into a customs border. Ships linked to Israel are excluded; tolls are reportedly payable in cryptocurrency. The IRGC (Islamic Revolutionary Guard Corps) mine charts published on 9 April direct all traffic through corridors near Larak Island under IRGC naval control. Oman formally refused the toll regime, citing international maritime treaty obligations, but Omani vessels still face the same inspection process.

ADNOC CEO Sultan Al Jaber put it plainly: "Passage is subject to permission, conditions and political leverage." Goldman Sachs issued revised scenarios: $82 per barrel base if Hormuz resumes this weekend, $100+ if closed another month, $120 severe. Every day without mine clearance normalises the toll regime that preceded the ceasefire.

Deep Analysis

In plain English

Before the war, about 135 ships passed through the strait of Hormuz every day, carrying 20% of the world's oil. On Day 3 of the ceasefire that was supposed to reopen it, only seven ships passed and none were oil tankers. 325 tankers are sitting stuck inside The Gulf waiting. Iran is charging fees, banning some ships, and controlling who gets through. The UN tried to force the strait open; Russia and China blocked it.

Deep Analysis
Root Causes

Iran's closure of Hormuz reflects a shift from opportunistic disruption to structural leverage doctrine. The toll system represents a permanent claim to sovereign authority over an internationally recognised strait — the same claim it made unsuccessfully in the 1980s. The ceasefire has preserved the toll regime rather than ending it, which is Iran's primary economic gain from the war regardless of nuclear outcome.

China and Russia's UNSC veto removes multilateral enforcement. Without that mechanism, Hormuz reopening requires either a bilateral US-Iran deal that explicitly addresses the toll regime, or unilateral US naval action. The Trump administration has so far declined both.

What could happen next?
  • Consequence

    Every day without mine clearance normalises Iranian toll authority over an internationally recognised strait, making restoration of UNCLOS freedom of navigation progressively harder to claim without confrontation.

    Short term · Assessed
  • Risk

    GL-U expiry on 19 April would recriminalise 325 stranded tankers' cargo before the ceasefire even ends, forcing operators to choose between legal jeopardy and abandoning cargo.

    Immediate · Assessed
  • Consequence

    China's tankers already transit under the toll regime; its UNSC veto locks in a competitive advantage over Japanese, South Korean, and European shippers for as long as the regime persists.

    Medium term · Assessed
First Reported In

Update #64 · Islamabad talks open already cracked

Iran International· 10 Apr 2026
Read original →
Different Perspectives
DNV and Fassmer
DNV and Fassmer
Signed a memorandum at SMM in Hamburg, announced on 10 September, to seek an approval in principle for autonomous naval vessels. DNV's Rasmus Stute said autonomy is "becoming one of the key pillars in defence".
Belgian Ministry of Defence
Belgian Ministry of Defence
Awarded Exail Robotics Belgium €9.87m on 14 September, without competition, for three TRIDENT systems carrying the K-STER C mine-disposal vehicle for Ukraine. It had tendered separately in July for twelve tethered ROVs, not yet bought.
IRGC Navy (Iran)
IRGC Navy (Iran)
IRGC spokesman Hossein Mohebbi said the IRGC Navy seized a US Kingfish mine-hunting vehicle in the Strait of Hormuz on 27 September, valuing it at several million dollars. US Central Command calls the claim "clearly desperate"; no verified imagery exists.
UK Defence Intelligence and Kraken
UK Defence Intelligence and Kraken
Defence Intelligence said the 12 September clash "almost certainly marks the first time" Russian and Ukrainian USVs engaged directly. Kraken meanwhile trialled an unarmed Saab radar picket boat on 5 and 6 October.
Ukrainian forces and ARX Robotics
Ukrainian forces and ARX Robotics
A Ukrainian Sargan-3000 destroyed a Russian robot boat on 12 September, and the first ARX GEREON ground robots reached Ukraine on 29 September. The Sargan-3000 carries a mounted gun.
Indian Register of Shipping
Indian Register of Shipping
Certified Accurate Industrial Controls' ISACA collision-avoidance software to IMO standards after five audited milestones and 2,500 hours of trials. The firm plans to use it converting six Indian Navy patrol boats.

Written with AI from Lowdown's published reporting. Not individually reviewed by an editor. Editorial standards.