Advancing UK Aerospace, Defence, Security & Space Solutions Worldwide
  • Home
  • /
  • Defence
  • /
  • ACUA Ocean secures £5.5m to deliver world’s most advanced open ocean USV

Defence Security

ACUA Ocean secures £5.5m to deliver world’s most advanced open ocean USV

Plymouth-based autonomous unmanned surface vessel (USV) developer ACUA Ocean has closed its £1.5 million Pre-Seed investment round co-led by StealthPoint and Britbots, alongside securing £4 million in new and existing research and development grants from the UK’s Department for Environment, Food & Rural Affairs (DEFRA) and Department for Transport.

Above: (left to right) ACUA Ocean Co-Founders, Mike and Neil Tinmouth.
Courtesy ACUA Ocean

The pre-seed round, led by StealthPoint, a US defence and intelligence investor deploying capital into hardware and software innovators, focusing on strengthening national security for the US and its allies.
 
The round also saw investment from the UK early-stage investor in robotics and automation, BritBots and sees ACUA Ocean join an exclusive portfolio of pioneering firms such as QLM Tec and Humanising Autonomy. Sixth Wave Ventures and Blue Action Accelerator also participated in the round.
 
The venture investment commitments add to the £4 million grant funding secured by ACUA Ocean from UK government bodies, which included a successful application to the Department for Transport’s Clean Maritime Demonstration Competition and Smart Shipping Acceleration Fund and a successfully completed grant from DEFRA relating to the Improving Marine Observation and Biodiversity programme, a government-led scheme focused on building comprehensive solutions for data collecting, processing and analysing remotely in real-time.

Advertisement
ODU RT

ACUA Ocean is currently developing its open ocean platform Pioneer-class USV, which can operate in very high sea states relative to its size, enabling systems and sensor payloads to be deployed in wave heights exceeding four metres (13ft). The prototype USV is hydrogen-powered, although there are plans for optional fuel powertrains in subsequent platforms. Pioneer will act as a platform or “mothership” providing the modular payload capacity, power and communications necessary for the launch and recovery of technologies, including remotely operated vehicles (ROVs),  Autonomous underwater vehicles (AUVs) and unmanned aerial vehicles (UAVs).

ACUA Ocean’s approach to ‘interchangeable nested robotics’ will replace the need for larger, more costly crewed vessels to do dull, dirty and dangerous tasks, such as subsurface surveys, monitoring and protection of critical offshore infrastructure.

Advertisement
ODU RT

Commenting on the latest investment, ACUA OCEAN Co-Founder Neil Tinmouth said: “We’re excited to be collaborating with a visionary group of venture investors who share our passion for dual-use ocean technology.

"The combination of the rapid growth in offshore renewables, regional geopolitical uncertainty and threats to our marine biodiversity mean customers are increasingly seeking out vessels that can provide enhanced open ocean capabilities like the Pioneer.”

Advertisement
Gulfstream banner
Babcock reviews future vehicle platforms with UK SMEs at Defence Battlelab

Defence Events

Babcock reviews future vehicle platforms with UK SMEs at Defence Battlelab

24 April 2026

Babcock International Group has brought together key suppliers for an engagement day at the Defence Battlelab in Dorset, to look at upcoming requirements for a new generation of modern off road vehicles.

UKEF partners with Finance for Forces to support veteran-led exporters

Aerospace Defence Security Space

UKEF partners with Finance for Forces to support veteran-led exporters

24 April 2026

UK Export Finance (UKEF) – the government’s export credit agency – has announced a new partnership with Finance for Forces to help more veteran-led businesses access the finance they need to grow internationally.

Royal Navy evaluates next-gen maritime capabilities

Defence

Royal Navy evaluates next-gen maritime capabilities

24 April 2026

Earlier this year, demonstrations to the Royal Navy were successfully conducted at SubSea Craft’s UK headquarters as part of Atlantic Bastion, a programme to make Britain more secure from threats in the North Atlantic.

Government scouts private investment to advance defence innovation

Defence

Government scouts private investment to advance defence innovation

24 April 2026

This week the UK Defence Secretary John Healey and Chancellor Rachel Reeves met with leaders from UK banking, venture capital and strategic finance, to explore how private investment can be leveraged to drive innovation and accelerate defence readiness.

Advertisement
ODU RT
Thales expands Malaysian Armed Forces

Defence Events

Thales expands Malaysian Armed Forces' tactical comms

24 April 2026

In partnership with Advanced Defence Systems (ADS), Thales Malaysia is establishing a local assembly line for new-generation SYNAPS (V/UHF) Software-Defined Radios in Segamat, Johor, strengthening Thales’ local manufacturing capabilities.

UK and Indonesia launch flagship Maritime Partnership Programme

Defence

UK and Indonesia launch flagship Maritime Partnership Programme

24 April 2026

Babcock International Group, together with the British Embassy Jakarta, British Chamber of Commerce and Indonesian partners, have formally launched the Maritime Partnership Programme (MPP), a flagship agreement to deepen UK–Indonesia cooperation across maritime defence, fisheries, industrial capability and skills development.

Advertisement
ODU RT
Advertisement
FIA2026 animated banner