Skip to content
Welcome, thoughtbot's Giant Robots listeners!Start here
Autonomous Systems: Land & Sea
8NOV

Dark tankers hug Oman past Hormuz

4 min read
19:26UTC

On 22 June CENTCOM counted 55 merchant ships transiting Hormuz while Kpler tracked only 12, a 43-ship gap analyst Behrouz Bakhtiari attributed to AIS-dark vessels hugging the Omani shore.

TechnologyAssessed
Key takeaway

A 43-ship CENTCOM-Kpler gap exposed a dark Omani-shore corridor, breaking the link between transits and supply.

On 22 June CENTCOM, the US military command covering the Gulf, counted 55 merchant ships transiting the Strait of Hormuz while Kpler, the Paris-based cargo tracker, logged only 12⁠1. A 43-ship gap between a military count and a commercial tracker is too large to be measurement error. Kpler reads transits from the AIS transponders ships are meant to broadcast; CENTCOM counts hulls it can see. Supply-chain analyst Behrouz Bakhtiari attributed the gap to AIS-dark vessels routing along the Omani shoreline, transiting independently of both the framework and IRGC enforcement⁠2.

That is a third operating mode for the strait, neither open nor closed, that no prior update has named. It sits underneath the headline status the screens chase: the IRGC says shut, CENTCOM counts movement, and a dark corridor runs between the two. About 515 vessels stayed anchored region-wide on 22 June, most of them waiting for the insured route rather than the strait itself, while low-volume dark transits continue⁠3.

For the freight desk this complicates the read on the forward curve. If barrels move dark, the insured and flagged spot premium the TD3C spot rate captures overstates the real supply loss, because the cargo crossing the Omani shore pays no war-risk freight and shows up in no benchmark. No price instrument captures a compliance-blind corridor cleanly, so it sits underneath the headline transit count as a structural variable. The closure politics belong to Iran-conflict-2026; the flow implication, that the visible count and the true volume have come apart, is the trade here.

Deep Analysis

In plain English

Two organisations counted how many ships crossed the strait of Hormuz on 22 June and got very different answers. The US military said 55 ships crossed. Kpler, a company that tracks ship movements using GPS signals, counted only 12. The gap of 43 ships is not a mistake: it likely reflects ships that had switched off their GPS signals and navigated quietly along the Omani coastline to avoid being noticed by either Iranian patrols or Western tracking. This matters because shipping costs are very high right now due to the danger in Hormuz. If a significant number of ships are actually moving through quietly, with lower costs and no insurance, then the official freight prices are exaggerating how bad the supply situation is. The real supply loss may be smaller than the freight market implies, which is why the oil price barely reacted to the re-closure on 21 June: some oil was still getting through via the back door.

What could happen next?
  • Consequence

    If the 43-ship CENTCOM-Kpler gap reflects genuine dark-corridor flow, the TD3C spot premium embeds a supply-loss fear that overstates actual disruption, creating a potential correction risk when the backlog releases and the premium compresses faster than fundamentals warrant.

    Short term · Suggested
  • Risk

    Vessels transiting the dark corridor are operating without Western P&I cover, creating accumulated liability exposure on any incident. A single significant casualty (collision, fire, hull loss) in the Omani coastal zone would create a major underwriting event and could accelerate shadow-fleet insurance costs.

    Medium term · Suggested
  • Precedent

    The dark corridor's operationalisation as a third Hormuz mode independent of both MOU frameworks and IRGC enforcement creates a precedent for future Hormuz crises: informal bypass routing can sustain partial flow even during formal closures, limiting the maximum supply-disruption potential that any closure can achieve.

    Long term · Assessed
First Reported In

Update #10 · Hormuz opened on paper, freight said no

Al Jazeera· 22 Jun 2026
Read original →
Different Perspectives
EDGE Group
EDGE Group
EDGE took control of Italian engine maker CMD in October and signed exploratory USV memorandums with Novamarine and Abu Dhabi Ship Building in early November. It is assembling an Italian hull and engine supply chain around Emirati autonomy, with no customer named.
Japan Ministry of Defense
Japan Ministry of Defense
Nikkei reported on 29 October that the ministry will start research in fiscal 2027 towards mass-producing underwater drones for detection and attack, with prototypes by fiscal 2035. The stated aim is to deter China's growing submarine fleet with fewer sailors at risk.
Kongsberg Discovery
Kongsberg Discovery
Kongsberg received a $54m DIU modification, mainly for AUV deliveries, and Camilla Kiss said the unit has signed 1.7bn Norwegian kroner of AUV contracts in 2026. The Norwegian maker sells into the US market as an established production line.
Elbit Systems
Elbit Systems
Elbit bought ISE of Vancouver, maker of more than 250 AUVs, on 20 October for a price it called not material. The Israeli group adds an underwater vehicle line to its naval business.
Defense Acquisition Program Administration
Defense Acquisition Program Administration
DAPA's 179th committee cleared a 591bn won mine-warfare USV programme on 6 November, alongside the Jangbogo-N nuclear submarine. HD Hyundai's Long Beach trial with Anduril shows Korean industry pitching hulls abroad while Seoul funds its own.
Finland National Emergency Supply Agency
Finland National Emergency Supply Agency
NESA opened an €11m competition on 4 November for radiation-sensing drones and ground robots, including quadrupeds, for the EU's rescEU stockpile. It is a civil-protection buyer using open tender, with a decision expected in March 2027.

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