Skip to content
You can now search across every topic, entity and event.What's new
Drones: Industry & Defence
20AUG

US prime digs into UK seabed war

4 min read
16:38UTC

At the Combined Naval Event from 19 to 21 May, US shipbuilder HII pushed its uncrewed underwater vehicles toward the Royal Navy through British partner Babcock under the ARMOR Force initiative.

TechnologyDeveloping
Key takeaway

An American firm is embedding in Britain's underwater robot fleet through a UK partner, not selling from abroad.

At the Combined Naval Event from 19 to 21 May in Farnborough, the American shipbuilder HII pushed its uncrewed underwater vehicles toward the Royal Navy through a British partner. 1 An uncrewed underwater vehicle (UUV) is a submarine-shaped robot that runs without a crew, used to hunt mines, inspect seabed cables, and scout ahead of manned ships. HII said it has delivered more than 750 REMUS UUVs to over 30 countries, and that a REMUS 600 was launched and recovered through the torpedo tube of the submarine USS Delaware. That manoeuvre lets a submerged boat send a robot ahead to scout or hunt mines without surfacing.

The UK hook is the tie-up with Britain's Babcock on the Autonomous Maritime Operations and Recovery initiative (ARMOR Force) for the Royal Navy, plus an enlarged HII facility at Portchester in Hampshire, positioned as a European hub for allied navies. Routing the pitch through Babcock and a UK site converts a US export bid into a British industrial presence that is harder to displace on sovereignty grounds, the same ground on which European buyers are pressing for home-built kit.

L3Harris said on 27 May its sub-launched Iver4 900 underwater vehicle is in delivery to the US Navy under a Defense Innovation Unit contract, a marker of how fast torpedo-tube-launched robots are reaching the fleet. 2 Both HII and L3Harris demonstrated the launch-and-recovery trick within the same window. For European navies the read is procurement urgency, since seabed cables and pipelines now sit inside the threat picture and the robots to defend them are arriving from American primes first.

Deep Analysis

In plain English

HII's REMUS family are underwater robots launched from a submarine's torpedo tube; they can search the seabed for mines, gather intelligence, or inspect undersea cables without a crew aboard. The parent submarine stays hidden while its robot scouts ahead, which is why navies pay large sums for this capability. At a UK naval conference in May, the American shipbuilder HII showed the Royal Navy its REMUS and ROMULUS underwater robots, working through its British partner Babcock. HII has already sold over 750 of these vehicles to more than 30 countries. A separate US company, L3Harris, also announced its Iver4 900 torpedo-launched robot is now being delivered to the US Navy. Both pitches are part of a push by US firms to supply the UK and European navies as demand for underwater surveillance rises.

Deep Analysis
Root Causes

The Royal Navy's receptiveness to US-origin subsea autonomy has one primary structural driver: the decommissioning of the UK's dedicated mine countermeasures and hydrographic capability at a pace that outstrips domestic procurement.

When the Batch 1 River-class offshore patrol vessels were sold, and as the Hunt and Sandown mine hunter fleets age, the gap between what the Royal Navy needs to do and what its own hulls can deliver has widened. ARMOR Force offers a faster route to subsea ISR and minehunting capability than a clean-sheet UK programme.

For HII, the strategic logic is market consolidation ahead of an expected NATO-wide increase in UUV procurement following the Red Sea cable-cutting incidents of 2023-24 and Baltic seabed infrastructure attacks. Establishing a European support hub before that procurement wave arrives creates a switching cost for Allied navies: a Royal Navy fleet using REMUS 600 for torpedo-tube operations will naturally prefer to re-order from HII's Portchester hub rather than convert to a competing system.

What could happen next?
  • Consequence

    HII's Portchester European hub and Babcock partnership create a US-origin UUV supply chain embedded in UK sovereign infrastructure, making future Royal Navy procurement of competing European platforms structurally harder.

    Medium term · Assessed
  • Risk

    French and German AUV manufacturers face a narrowing window to establish equivalent reference sales with a NATO tier-one navy before US-origin platforms set the interoperability standard for Allied submarine-launched UUV operations.

    Short term · Suggested
  • Precedent

    USS Delaware's torpedo-tube REMUS 600 demonstration is the first publicly confirmed instance of a UK-allied navy certifying a US UUV for submarine-tube launch, establishing a technical baseline for joint Allied subsea operations.

    Immediate · Assessed
First Reported In

Update #1 · UK's robot navy sails for Hormuz

Naval News· 29 May 2026
Read original
Different Perspectives
South Korea's Defense Acquisition Program Administration
South Korea's Defense Acquisition Program Administration
DAPA folded drone and roadside-bomb jammers into an 18-year, KRW 3.448 trillion K2 tank upgrade approved 11 August, rather than fund counter-drone kit as its own programme. Seoul is treating the threat as permanent enough to write into a platform's lifecycle, not urgent enough to buy ahead of it.
NATO Support and Procurement Agency
NATO Support and Procurement Agency
NSPA named five pre-qualified counter-drone suppliers under new framework contracts on 27 July, giving allies a purchasing route with no published budget attached. A framework without committed money is an instrument waiting for a spending decision, not a guarantee one is coming.
Ukraine's Ministry of Defence
Ukraine's Ministry of Defence
Ukraine's forces strike with more than 70 AI and computer-vision systems drawn from over 200 domestic producers, the ministry said on 18 August, a supplier base neither Washington's tariff fight nor Beijing's export licence touches. Kyiv is scaling capability faster than either government is writing rules for it.
A European drone-component manufacturer
A European drone-component manufacturer
A European manufacturer selling components into the United States faces the same 100 per cent tariff and 3 September deadline as any other foreign supplier, with the duty-free onshoring carve-out available only to firms building on American soil. That leaves it to absorb the cost, relocate assembly, or cede the US market rather than shop around a rival supply chain.
Chinese drone component exporters
Chinese drone component exporters
Exporters now need a case-by-case licence for each US-bound dual-use shipment after MOFCOM's 5 August order, with no published review clock. The same week Shenzhen logged nearly 200,000 domestic logistics-drone sorties and Hunan reported record spraying coverage, a home market large enough to absorb what the licence regime slows from leaving the country.
US drone manufacturers
US drone manufacturers
The onshoring carve-out protects Performance Drone Works' $820 million War Department loan, but the same 3 September deadline hits Red Cat Holdings and Unusual Machines, both filing over 500 per cent revenue growth on 6 August, on Chinese-sourced components with no qualified domestic substitute yet.