Iran war drives urgent need to counter underwater attack drones
- Reference: 1774610252
- News link: https://www.theregister.co.uk/2026/03/27/us_and_uk_forces_auv_tender/
- Source link:
News of the AUV tender comes against the backdrop of the US [1]deploying uncrewed drone boats around Iran as the conflict heats up. Iran is believed to be behind at least two explosive-laden [2]sea drone [3]attacks on oil tankers in the Gulf since the US and Israel first attacked Iran on February 28. The first drone attack reportedly took place on March 1, about 44 nautical miles off Oman, and the second, on March 5, hit [4]a Bahamas-flagged crude oil tanker near the Iraqi port of Khor Al Zubair.
Iran is known to [5]possess – and use – autonomous underwater vehicles in conflicts dating back two years. Specifically, Iran was spotted shipping torpedo-like drones and "one-way attack" underwater drones to Houthi rebels in Yemen in 2024. These are small but experts suspect they can inflict "significant damage on ships."
[6]
According to the Ministry of Defence (MoD), the US Defense Innovation Unit (DIU) has kicked off a competition that allows companies of all sizes to pitch technology directly to them, under a program called REEF (Robotic Exclusion and Engagement Framework).
[7]
[8]
This is a bilateral scheme operated jointly by the US and UK. American and British teams will assess submissions with the aim of identifying potential defense solutions for both parties.
British companies can apply, with solutions assessed by jHub, the innovation team of the MoD's Cyber & Specialist Operations Command, for potential UK defense use.
[9]
While the Iran war isn't specifically mentioned, the reason behind this call for solutions is the general threat posed by drones, specifically uncrewed underwater vehicles (UUVs), which are the subsea equivalent of airborne attack drones.
Ukraine is also instrumental in showing the potential danger from these weapons. Last year, the country's armed forces claimed they [10]struck and disabled a Russian Kilo-class submarine that was docked in Novorossiysk harbour on the Black Sea coast.
While [11]independent sources said it was difficult to verify if the submarine had been badly damaged, the quay wall it was docked at did show an area of heavy damage in satellite images.
[12]
The drone that carried out this attack was referred to as "Sub Sea Baby," which may just be a new name for an existing [13]Marichka kamikaze UUV, according to some sources. This is about 6 m (20 ft) long and able to carry a payload of about one ton, with a range of up to 1,000 km (621 miles).
Britain also has underwater drone projects on the go, such as [14]BAE Systems' Herne , officially known as an extra-large autonomous underwater vehicle (XLAUV), and the similar-sized [15]Excalibur . These are not one-way suicide drones, but Herne in particular can carry a range of mission-specific payloads, which could include depth charges or other weapons.
On a rather different scale is the Russian " [16]Poseidon " weapon. Sometimes described as a torpedo, this is 20 m (65 ft) long, has a range of 10,000 km (6, 213 miles) and is armed with a nuclear warhead to totally destroy ports and even coastal cities.
With REEF, the US and UK are seeking solutions addressing four areas: sensors; counteraction technologies; communications; and command and control systems.
Sensors must detect, track, and classify underwater threats, even in challenging environments, with the ability to distinguish genuine threats from natural contacts to reduce false alarms.
The counteraction or defeat capabilities could be kinetic, meaning they physically strike the UUV directly or use something like acoustic directed energy. However, both the UK and US say they are interested in decoy systems to confuse hostile underwater craft.
[17]Security boffins scoured the web and found hundreds of valid API keys
[18]Forget drones – the US Army just took delivery of a self-flying Black Hawk helicopter
[19]The drone swarm is coming, and NATO air defenses are too expensive to cope
[20]Flying cabs, next-gen aircraft cleared for takeoff in 26 states
For communications, solutions are expected to deliver secure data transmission for near real-time sensor-level visibility. This can be tricky if it involves underwater communication with something like a defensive UUV or an anti-drone torpedo, but there are some technologies available, as The Register has covered [21]here and [22]here .
Finally, there is the requirement for a Common Operating Picture (COP), meaning technologies that can integrate tracking and sensor data with existing command and control (C2) systems. These are deployed to provide suggestions to the user via AI decision-making assistance, and must explain why a particular action is recommended.
The competition is being run and managed by the [23]US DIU , and it says vendors are welcome to submit proposals for any components they think they can satisfy, or a complete solution. But interested parties had better get their skates on, as the deadline to submit ideas for the challenge is April 3. ®
Get our [24]Tech Resources
[1] https://www.reuters.com/business/aerospace-defense/us-deploys-uncrewed-drone-boats-conflict-with-iran-2026-03-26/
[2] https://www.reuters.com/world/middle-east/sea-drones-target-oil-tankers-middle-east-conflict-risks-widen-2026-03-11/
[3] https://www.reuters.com/world/middle-east/sea-drones-target-oil-tankers-middle-east-conflict-risks-widen-2026-03-11/
[4] https://www.reuters.com/world/americas/crude-tanker-sonangol-namibes-hull-likely-breached-after-blast-near-iraq-port-2026-03-05/
[5] https://www.hisutton.com/Iranian-Houthi-UUV-notes.html
[6] https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_offbeat/front&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=2&c=2aca3slwVXtwoqCClhIMqPwAAAIk&t=ct%3Dns%26unitnum%3D2%26raptor%3Dcondor%26pos%3Dtop%26test%3D0
[7] https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_offbeat/front&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=4&c=44aca3slwVXtwoqCClhIMqPwAAAIk&t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0
[8] https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_offbeat/front&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=3&c=33aca3slwVXtwoqCClhIMqPwAAAIk&t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0
[9] https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_offbeat/front&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=4&c=44aca3slwVXtwoqCClhIMqPwAAAIk&t=ct%3Dns%26unitnum%3D4%26raptor%3Dfalcon%26pos%3Dmid%26test%3D0
[10] https://www.naval-technology.com/news/ukraine-claims-world-first-underwater-drone-strike-on-russian-submarine/
[11] https://www.bbc.co.uk/news/live/cjezn513qp7t
[12] https://pubads.g.doubleclick.net/gampad/jump?co=1&iu=/6978/reg_offbeat/front&sz=300x50%7C300x100%7C300x250%7C300x251%7C300x252%7C300x600%7C300x601&tile=3&c=33aca3slwVXtwoqCClhIMqPwAAAIk&t=ct%3Dns%26unitnum%3D3%26raptor%3Deagle%26pos%3Dmid%26test%3D0
[13] https://militarnyi.com/en/news/developers-of-the-marichka-underwater-drone-reveal-some-of-its-characteristics/
[14] https://www.theregister.com/2025/09/11/bae_systems_surfaces_autonomous_submarine/
[15] https://www.royalnavy.mod.uk/news/2025/may/15/20250515-uncrewed-submarine-naming-ceremony
[16] https://thebulletin.org/2023/06/one-nuclear-armed-poseidon-torpedo-could-decimate-a-coastal-city-russia-wants-30-of-them/
[17] https://www.theregister.com/2026/03/27/security_boffins_harvest_bumper_crop/
[18] https://www.theregister.com/2026/03/23/black_hawk_self_flying_army/
[19] https://www.theregister.com/2026/03/23/nato_air_defenses/
[20] https://www.theregister.com/2026/03/10/evtol_pilot_26_states/
[21] https://www.theregister.com/2023/09/07/mit_underwater_communications/
[22] https://www.theregister.com/2025/12/08/kyocera_underwater_multigigabit_comms/
[23] https://www.diu.mil/work-with-us/submit-solution/PROJ00607
[24] https://whitepapers.theregister.com/
Re: Might I propose?
Stingray............. heads off to find vids of Marina
Re: Might I propose?
They're fighting the Iranians, not the Australians.
Re: Might I propose?
I'd still send in Flipper any day.
Re: Might I propose?
Yeah, I was likewise thinking schools of kamikaze [1]soft-bodied RoboFish and [2]GhostSwimmer drone sharks, upgraded with lasers and nuclear power plants ...
They could be deployed around seafaring vessels as an escort, and provide effective (and fun) autonomous REEF protection against son-of-a-shoe adversarial UUVs! ;)
[1] https://www.theregister.com/2018/03/22/finding_robo/
[2] https://www.theregister.com/2014/12/18/ghostswimmer_robot_shark_swims_for_us_navy/
Re: Might I propose?
Israel already has it's Shark program: https://en.wikipedia.org/wiki/Israel-related_conspiracy_theories#Sharks
I'm pretty sure that by now the Space Laser program and the Shark program have been combined, to create a joint UUV and an AUV system.
So perhaps the US and the UK should just buy off the shelf Laser Sharks from Israel, instead of developing their own AUV programs.
Where's my money?
Here's my revolutionary, never-been-tried-before solution: don't attack other countries.
My sophisticated modelling suggests that the chances of an Iranian naval drone hitting a US navy ship stationed, for example, in San Diego is exceedingly low. Surprisingly enough, that number becomes just about zero when you're not bombing cities in Iran.
Now, where do I collect my payment?
Re: Where's my money?
Dear silent_count,
thank you for your underwater drone defence proposal. Our technical assessment showed this had the highest score of all proposals in terms of defensive outcomes, achieving 100%. However, it scored very low on three critical elements that have equal weighting with defensive outcomes:
i) Money making opportunities for the elite. Your score, zero
ii) Kill rate of incoming drones when tested. Your score, zero
iii) Epstein smokescreen value. Your score, minus 100%
Accordingly we will not be taking your proposal forward to the second round, although in line with the competition rules we have taken ownership of the concept and all IP inherent within it.
Thanks you for your interest,
Love,
Darpa
Re: Where's my money?
That assumes you tell people you aren't attacking other countries.
If however you announce an attack on Agrabah with accompanying AI generated footage of your glorious missliles defintiley not hitting playschools, milk factories and your own side.
Then you can keep a war going as long as you want for the price of a couple of Claude licenses, with perfectly timed victories, no returning coffins and no loss of expensive military kit
Re: Here's my revolutionary, never-been-tried-before solution:
" don't attack other countries. "
Hell no !
That is manifestly un·american.
It is incontrovertibly the God given right of the US to fuck over every nation on the planet.
One consolation, small at that, is that the current MAGAty Administration didn't notice there ought to be an "other" between the "every" and "nation" above and commenced their fuckery on their own nation.
" For they have sown the wind, and they shall reap the whirlwind:…the strangers shall swallow it up. " [Hosea 8:7]
Re: Here's my revolutionary, never-been-tried-before solution:
Attacking other countries is manifestly un·american. but might i suggest they concentrate on attacking America?
Since for much of the country the civil war was the height of their patriotic identity. It would be the one thing to heal the political divide and bring left and right together in the one thing they can agree on, enjoying killing Americans.
Re: Here's my revolutionary, never-been-tried-before solution:
Best case, after 20 years of attempting regime change the UA leave and abandon America to the locals
Re: Here's my revolutionary, never-been-tried-before solution:
Since for much of the country the civil war was the height of their patriotic identity. It would be the one thing to heal the political divide and bring left and right together in the one thing they can agree on, enjoying killing Americans.
I second that!
Today they are the Disunited States of America, and they're all prepared: Around 24 million individual private citizens own an assault rifle, even divided between two sides , US assault rifle owners form two corps each about the size of the entire Russian military at the end of WW2. And then there's about 450 million handguns and rifles in the US, so enough for every man, woman and child to have one, and still a hundred million looking for somebody to pull their trigger. Nobody needs miss out, the most inclusive civil war ever! And they've also got about 45 million pickup trucks just begging to have a heavy machine gun bolted to the loadbed. Even the ratio of 7 combatants and a babby to each pickup looks about right.
So there we have it, American civilians are the biggest, best armed infantry the world has ever seen, just itching to start popping off at each other. We know the lines of division and several of the flags. What are they waiting for?
Re: Where's my money?
"don't attack other countries."
Yeah, just let the likes of Iran take out countries such as Israel with nuclear weapons. Whatever one thinks of the policies of the Israeli government, there is no justification for nuking millions of civilians. It's not that long ago that Iranian leaders were calling for the annihilation of Israel.
Should we have just let Russia take Ukraine? There will always be a need for offensive and defensive weapons.
Re: Where's my money?
> Yeah, just let the likes of Iran take out countries such as Israel with nuclear weapons. Whatever one thinks of the policies of the Israeli government, there is no justification for nuking millions of civilians. It's not that long ago that Iranian leaders were calling for the annihilation of Israel.
1) North Korea has not nuked Seul; Pakistan and India have not nuked each other; Israel has not nuked Teheran; Russia has not nuked any of the various places it has threatened to nuke; and the UK, France and China have managed to not even really ever threaten to nuke anyone. A few of those countries are even less rational or stable than Iran.
2) If the West wants to stop other countries from developing nuclear programs, it should stop invading non-nuclear countries for no good reason, start protecting non-nuclear countries from invasion in return for them not developing nukes, and - this is important - stop blatantly breaking those agreements as soon as the administration changes . As things stand now, if there's any chance you might get on some great power's shitlist, you'd be insane not to pursue nukes, and the West is entirely responsible for setting up the game theory to work this way.
3) If the game is wiping countries off the map, so far Israel seems to be winning. Nobody is making any serious attempt to stop it, not even among countries that have no reason to love Israel and enough firepower to hurt it. Why? Nukes.
> Should we have just let Russia take Ukraine?
Fuck no, we should be defending it far harder. See above. We agreed to defend Ukraine in return for Ukraine giving up its nukes, and we broke that agreement the moment it looked like it might be costly to keep. Oh, I bet it made sense, but then don't complain if other countries start seeking nukes. If you can't make the rules, at least you can play by them.
If you were wondering what's the difference between Israel and Ukraine, it's that Israel is fighting a war of aggression, Ukraine is fighting a war of defense. Israel's defense excuse went stale a long time ago.
VA-111 Shkval
Interestingly https://en.wikipedia.org/wiki/VA-111_Shkval notes:
Operators: Iran (speculative) • Islamic Republic of Iran Navy (speculative)
At " speeds in excess of 200 knots " I imagine these are squalls that could really rain on your parade.
The Gulf is a rather small barrel with a lot of quite large fish which are proverbially easily to shoot although only a raving lunatic is likely to think discharging a firearm into a tub of fish would give you anything other than a facefull of cold water laced with fragmented fish. Unfortunately the planet appears to have produced a bumper crop of raving lunatics who have managed to promote the more homicidal of their number to high office.
Come on people
Four years of war in Ukraine have shown how effective drones can be on the battlefield.
Why have you left it till now to start thinking about protective measures?
Re: Come on people
Drones fly = air force in charge of drones = air force get all anti-drone funding
Air force not know about water - air force did go to Florida on spring break but didn't go in pool cos it would mess up their hair
Navy not believe in drones because obviously no space onboard for petty officers to have their own mess.
Come on people "Why have you left it till now to start thinking"
Question rhetorical definitively.
Honestly if each useful human thought were a 20 kiloton atomic explosion the neither the planet nor civilisation would be much inconvenienced.
The only reason AI looks even vaguely plausible is the complete mental lassitude exhibited by the totality of humanity (save a few rebels.)
Re: Come on people
Four years of war in Ukraine have shown how effective drones can be on the battlefield.
Why have you left it till now to start thinking about protective measures?
Ukraine likes to claim credit for inventing the drone threat, but that pre-dates the SMO. So Iran had been making Shaheds before then. Criminals had also been using drones and 'ring droppers' or 'fish baiters' to smuggle drugs & phones into prisons, who then pioneered 'cope cages' and netting over open areas to prevent that. Houthis had also used drones to attack Saudi oil facilities, and American bases in Syria had also been attacked. Iran may have supplied those drones, or helped users. But then the same is probably also true with Ukraine, eg-
https://en.wikipedia.org/wiki/Sea_Baby
In an interview with CNN, Vasyl Malyuk, the Head of the Security Service of Ukraine, stated: "Marine surface drones are a unique development of the Security Service of Ukraine. No private company was involved in this.
But also rumors that those drones were actually a US development intended to defend Taiwan. But as the article also points out-
One of the first examples of an attack by an unmanned boat happened in 2020, when a Saudi frigate was bombed by the Houthi rebels using a surface craft loaded with explosives.
It's one of those genies that is well and truly out of the bottle, with a lot of hostiles thinking 'Hey, we can do that!' and convert a cheap jetski into a bombski, and make cheap precision guided munitions that cost a lot less than MIC-missiles. Ukraine has certainly innovated with sneaky things like adding SAMs or surface-surface missile launchers to their drones.. But then Russia and Iran have also been innovating, hence the growing drone threat. Especially in confined waters like the Straits. Or just the way Iran's been releasing videos showing their soldiers getting ready to defend Kharg Island, with each soldier equipped with a couple of attack drones.
So I'm curious how we can respond to the threats of air, surface and sub-surface drones. Especially when we're rolling out £4bn+ Type-26 Frigates.. Which are probably the kinds of warship Trump wants to unblock the Straits. Which is one of those 'You first!' political issues. Trump's been flipping between bigging up the mightiest military in the world! with rants about NATO not helping. Someone should point out NATO Article 6 and why Israel and the US aren't sending in their own warships. But then the US has been struggling with developing their own Frigates, and has probably been too focused on stand-off capability and not the kinds of brawlers needed.
Which I think is much the same issue with WW2 and the air threat. That resulted in a lot of existing ships being retrofitted with lots of 5" and smaller calibe guns to deal with that challenge, then new designs being upgunned. Which is now the challenge with ships like the Type-26. It already seems to have a lot of ship protection systems, but now it's going to need more. And where do you put additional mounts for additional systems to defend the ship against drones? Plus in a Hormuz-type conflict, how a warship can protect any ships it's trying to escort?
So personally, I think the solution is to have warships like the Type-26 or Type-45 as sensor platforms, then we probably need dedicated anti-drone picket ships bristling with guns, grenade launchers, maybe DEW and the ability to launch lots of their own drones. Type-26 has a large flight deck & hanger, but if that's full of drones, then less room for helicopters.
How about instead...
We just condemn the USA for its latest illegal war?
Where are the voices that condemned Russia, but are miraculously silent when the USA does the same only 10 times worse?
Re: How about instead...
10 times worse? And you really have not read any forums if you think people have been silent. But thats how it works for people like you.
VoT, the resident anti west lunatic
Re: How about instead...
Not anti-West. Holding the West to the same standards and account that the West holds $bogeyman to.
Re: How about instead...
"10 times worse" - Voice Of Lies
Already mined
I have recently thought the strait's may already be mined. Reasons include, ships transiting at the moment hug the coast line next to Iran and TACO has really chickened out this time. If it were already mined except along the coast and mined in a way that clearing will take months, and that became public knowledge, oil would skyrocket, markets would tank, and donnie would be in a world of hurt. One way to prevent that knowledge of coming into the open would be to TACO. Hard to say for sure though as the TACO thing is a thing too.
Re: Already mined
At most it's a small number of moored mines. Iran is still sending its ships through, which means safe passage does exist.
If they wanted, they could start dumping drift mines in the Gulf, which would make the drone threat look positively minor.
Re: Already mined
Yes they are, but as I said, the ship is directed to follow close to shore. Makes sense if you mined the far/middle parts. Easier to control an even narrower strait. And if you can mine waterways like land, it would be very difficult to unmine them. I don't know how they get laid and removed. Several countries decades later are still extracting land mines which were cheap as chips to put in.
Might I propose?
Halibut with Laser Beams