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

Brent closes at $105.73, dark activity rises

2 min read
11:07UTC

Brent crude broke back above $100 on Friday and closed at a new post-extension high. Windward logged nine Hormuz transits against a pre-war baseline above 100.

TechnologyDeveloping
Key takeaway

Brent retakes $100 as dark activity grows on collapsed transit volumes.

Brent Crude traded above $106 on Friday 24 April morning and closed at $105.73, a new post-extension high. The price sits 57% above the $67.41 pre-war baseline and marks the first trading day back above the $100 threshold since the ceasefire relief of 21 April priced out. Brent last cleared $100 at contract expiry on 18 April, when it settled at $97.91 after a three-day slide; the current level reverses that compression.

Windward, the maritime-intelligence provider, logged 9 Hormuz transits on 22 April (six inbound, three outbound) against a pre-war baseline above 100 per day⁠1. Gulf-wide vessel presence climbed to 868 vessels (+108), reversing the 20 April easing, as dark-activity events, defined by Windward as AIS switch-offs or spoofing, rose 13% to 132 events. Three named Windward-tracked vessels tied to the 22 April IRGC seizures appear in the 22 April transit data prior to the interdictions, confirming live tracking.

Dark activity rose 13% on 22 April even as transit count collapsed 91% against the pre-war baseline. Fewer vessels would normally suppress deceptive-shipping signals because fewer hulls are available to hide; instead Windward logged the opposite pattern on the same day IRGC seizures and mine-laying threats escalated. Charterers are still attempting the route but now layering identity obfuscation on every passage, which raises the probability of a misidentified vessel drawing CENTCOM engagement under the verbal shoot-kill order.

For UK motorists the wholesale shift translates to roughly 25-30p per litre above pre-war pump prices if the retail sector passes it through by early May. European haulage desks are pricing the new high into May contracts; Mediterranean LNG buyers are seeing the knock-on in spot markets. With no new Iran instrument signed in Washington, the Brent level is responding to kinetic risk in the strait rather than to paper.

Deep Analysis

In plain English

Oil hit $105.73 a barrel on 24 April, the highest point since the ceasefire relief of 21 April priced out of the market. That is 57% above what oil cost the day before this war started. For UK motorists, it translates to roughly 25-30p per litre above pre-war pump prices. A shipping intelligence firm called Windward tracked only 9 vessels transiting the strait of Hormuz on 22 April, against more than 100 per day before the war. But it also tracked 132 vessels behaving suspiciously, trying to hide their movements. the strait has not emptied; it has filled with risk instead of cargo.

What could happen next?
  • Consequence

    Dark-activity events rising 13% on the same day IRGC seizure and mine-laying threats escalate means deceptive shipping is growing precisely when the legal and kinetic risk of detection in Hormuz is highest, compressing risk into the same narrow corridor.

First Reported In

Update #78 · Allies flagged, adversaries listed, nothing signed

US Treasury OFAC· 24 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.