The Royal Navy has conducted a pioneering trial demonstrating the launch and recovery of uncrewed underwater vehicles (UUVs) from a submarine, expanding the capabilities of the UK’s nuclear-powered attack submarines.

According to a news update received by the UK Defence Journal, the trial took place in the Mediterranean under Project Scylla.

The exercise successfully tested the use of torpedo tubes to deploy and retrieve autonomous systems designed for underwater reconnaissance, communication, and seabed warfare missions.

Project Scylla is being delivered through AUKUS Pillar 2, which focuses on developing advanced defence technologies to strengthen security across both the Indo-Pacific and Euro-Atlantic regions. The trial represents an early milestone in integrating such technologies into frontline operations.

Commodore Marcus Rose, Deputy Director for Underwater Battlespace Capabilities, said: “Delivery of these trials demonstrates our commitment to the use of advanced capabilities as part of a future hybrid Fleet and are a big step forward in delivering new capability to the Submarine Service.”

The Royal Navy said that trials such as this form part of its Atlantic Bastion ambition, which aims to incorporate advanced technologies including autonomous systems and artificial intelligence to boost the effectiveness of the Fleet in contested environments.

The trial was conducted by the Submarine Delivery Agency’s Autonomy Unit, in partnership with L3Harris, a key industry provider of autonomous maritime systems.

George Allison
George has a degree in Cyber Security from Glasgow Caledonian University and has a keen interest in naval and cyber security matters and has appeared on national radio and television to discuss current events. George is on Twitter at @geoallison

17 COMMENTS

  1. Actually, could envision autonomous, AI enabled UUVs supporting the missions of both SSNs and SSBNs. Certainly, any required mission specific design changes could be incorporated into the SSN(A) design process, and perhaps even in the Dreadnought class production phase. Same rationale should apply to both Columbia and Virginia classes.

  2. Immense possibilities, but does anyone know if deploying UUVs will reduce the Astutes’ capacity to carry Spearfish and Tomahawk?

    • The simple answer is yes it will reduce the offensive armament. By how much will depend on how many of these are carried (not sure of their length/weight) down in the ‘bomb shop’.
      Depending on size/weight, they will almost certainly be stored on the weapon racks until needed.
      Perhaps SSN(A) will have a separate suite of smaller tubes to accommodate this type of sensor.

      • Iver4 900 is 2.5m long so assume this version is similar.
        It navigates its way back through the torpedo tube which has a much larger diameter. I don’t think USN which trialled this in 2923 plan to do any more than alter the tube hatch to facilitate recovery.

          • Just read the article on NL about it. Dimensions for it using the TT aren’t really an issue as the TT has a diameter of 533mm and is long enough to house a Spearfish torpedo.
            What is interesting during its recovery phase is does it just ‘drive in’ or does it need to ‘reverse’ in? The kit is approx 8ft long and having to turn it around(weight unk) to eventually reuse it isn’t an easy evolution in a ‘bomb shop’ full of weapons.
            Not entirely sure what’s involved with having to alter the ‘shutters’ on the tubes, as can’t see them altering anything on the actual ‘bow cap’ as it forms part of the watertight integrity of the tube.
            It’s obviously early days in this trial, so suspect that Astute had plenty of space in her ‘bomb shop’ to manoeuvre said vehicle around safely. Not necessarily going to be the case with a fuller weapons outfit.

          • If you had been referring to the MoD that date would have been taken as read methinks. 🤔

      • I suppose with SSN/A having vertical launch silos for cruise missiles it will take a bit of stress from the Bomb room in that they no longer need to take up rack space with cruise missiles..

        • That is correct, means more of everything given that there will be two separate launch systems. It is entirely possible that we also go with a second set of smaller diameter torpedo tubes (400mm) for UUVs like the Swedish Gotland/A26 class employ. Early days for all of this, but not beyond the realms of possibilities, with much being dependent on what size of UUVs the RN want to use.

  3. Potentially another big advantage nuclear boats will have over electric boats, bigger hulls will mean more space to carry autonomous systems and their are so many uses for autonomous systems.. especially if your willing and able to sacrifice them.

    • Lots of questions on the pros and cons of nuclear vs conventional subs as always a trade off, a single US current Virginia SSN Class approx eight times the cost of a the new Japanese Taigei Class and US only building one a year (actual number per annum in 2024 was equivalent of 1.15) the 7 Astute’s taking approx 19 years from the first commissioning in 2010 to the last in 2029.

    • Yes I’m sure the Russian fleet is not looking forward to this becoming widespread, even the mention of drones makes them run for cover. I wonder if terminal drones released by submarine launched carrier drones might be the next step though specialist launch options might be desirable to take full advantage, but would be a nightmare to defend against if fully matured.

  4. Great possibilities, I agree. But we need something to carry them in.
    The RN has one, yes one, seaworthy sub at the moment. When is availability expected to improve?

    • Availability won’t improve for a while, Xmas at the earliest would be my guess. However, if war suddenly broke out then we would probably surge 3 units, and concess some of the peacetime safety aspects that is currently keeping these assets alongside.

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