The Royal Navy’s Batch 2 River-class offshore patrol vessel HMS Trent has carried out her first 30mm gunnery firing in a year and a half, according to an update from the ship’s crew.

The exercise, authorised under the command’s live-fire training programme, took place as she heads to the Carribean.

The ship, which has been permanently based in Gibraltar since 2021, routinely operates across the Mediterranean, Gulf of Guinea and Caribbean. The 30mm DS30B Mark 2 system is Trent’s primary armament, designed for close-in surface defence against small boats, slow-moving aircraft, and other asymmetric threats.

HMS Trent’s operational history since commissioning in August 2020 has been marked by a mix of counter-piracy patrols, multinational training, disaster relief and anti-narcotics work. In recent years she has intercepted multiple drug-smuggling vessels in the Caribbean, including high-profile seizures alongside the US Coast Guard, and has provided humanitarian support in the wake of hurricanes and tropical storms.

The 2,000-tonne vessel is equipped with Kelvin Hughes SharpEye navigation radar, Terma Scanter 4100 2D surface search radar, and the BAE CMS-1 combat management system operating on the Royal Navy’s Shared Infrastructure platform. She carries two rigid inflatable boats and has a flight deck capable of supporting Merlin helicopters and embarked unmanned aerial vehicles, such as the Puma systems deployed in West Africa.

The DS30B 30mm mount, controlled via an electro-optical director, is designed for rapid engagement of fast inshore attack craft and can be operated manually or remotely. It is backed by heavy and general-purpose machine guns, providing layered defensive firepower for boarding operations, convoy escort and maritime security patrols. The gun’s re-certification through live firing ensures crew readiness for operational tasking across Trent’s diverse mission set.

George Allison
George Allison is the founder and editor of the UK Defence Journal. He holds a degree in Cyber Security from Glasgow Caledonian University and specialises in naval and cyber security topics. George has appeared on national radio and television to provide commentary on defence and security issues. Twitter: @geoallison

47 COMMENTS

  1. Ha.
    George, you did this deliberately !!!

    “Warship” “Opens fire with gun”.

    The Daily Mirror would have said “Battleship” lol.

    • I have suggested before that our George uses such “bait” articles concerning ships GPMGs and other “lowly” weapon systems to get people going.
      He replied that this was not so, and that it is an area he is especially interested in.
      And as the owner of this site, I’m not about to question that!

      • Ha, It appears more than a coincidence that a heated debate was ongoing about the RB2’s “Warship” designation !
        Humour from the Owner makes me more comfortable here now !

        • Look at the article histories.
          Lots of them on GPMGs and Red Tomato’s that get posters moaning, the uninformed sorts wanting Mk41s on HMS Magpie types.
          Bait? Or not.
          It was denied by the boss to me personally!

          • Ha, so where do I look to find these article histories ? all I can see are headings and a search icon.
            I’d love to find some posts with Ulya, given the recent comments.

            • There used to be a function, before the website got (presumably) cyber attacked and the comments were completely rebuilt, to view the comment history of anyone just by clicking on their username. It was useful for checking people’s posting history and seeing who had used multiple names. Incidentally DM had at least 10k comments!
              Though what I think DM is referring to is to use the website search function for live fire exercises, and George reports on nearly every one.

              • Oh, thanks. I suspect that there are people with multiple names here now judging by what I see. It’s the Odd ball comment that turns up in the middle of a conversation under a brand new name yet they always seem angry ! Just like someone who got shown up previously.
                DM had 10000 comments ? !!! wow, that’s some dedication, I guessed he was one of the regulars here, were they all under his one name or spread around ?
                Can’t find any such feature here now, that’s a shame really.

                • My name, mate. I’ve never been otherwise.
                  No time for that nonsense.
                  As TJ says, there used to be a great comment history function so you could read every post made.
                  Useful for checking histories.
                  I follow certain fav posters comments as well, such as Dern and Airborne for me, and now no choice but to randomly search.
                  Defo a loss to what we had.

                  • I hope I’m on your list ? If not, you can “Click on the bell and subscribe” !!!
                    Over on the NL site (I’ve been having a look in) there are some really busy posters too, I’m wondering if they have time to post here ? I spotted Tor PEDO ! and LEH and Supportive Bloke/Blone, there’s a Pete the tax payer, Hugo (think he’s here), Jonathan (Hello) Duckr, whale Island and a few more. Lots of comments, too many really.
                    I used to be on the MCN forum (Motor Cycle News), it was brilliant for at least ten years, lots of Banter, Arguments, Death Threats, the usual stuff, we had meets all over the country, lots of camping and random rides, but MCN pulled the plug and all contact was lost with so many, plus all the many conversations and pics we all shared.
                    One simple delete and all the history vanished.
                    I can understand your feeling of Loss guys.

                • DM is a knowledge ninja mate, pretty much any previous/up to date/future ORBATS, locations, kit etc Daniele was the go to SME!

                  • Ha, I had a Green Ninja, Kawasaki ZZR1400 with a healthy 222 BHP (Tuned), got rid as too many car drivers who can’t drive and don’t like others having fun, were fitting cameras.
                    That’s probably not your thing but, I did manage to get it “Airborne” a few times !.

                • Would you pick the name Daniele with the extra e on a British website if your parents hadn’t made the choice? It was several months before I stopped calling him “Danielle” in my head. I’d deffo have gone for “Dan”, just as I went for Jon rather than Jonathan with far less cause.

                  Sorry, Daniele, but I’m still not sure the right way to pronounce it. I just opted for the Italian pronunciation in my head once I figured you weren’t female. It’s about time I actually asked to confirm.

                  • Ha, evening Jon.
                    Yes, so may thought I was a she, and some still do.
                    It is pronounced
                    “Dan-e-ell-e”
                    Bog standard Dan is fine though.

                • Even the 10k comments bit?
                  IIRC it might even have been more!
                  It is a great pity that the old system was lost, the community it enabled was what got me seriously into this stuff. What we have now is getting better especially with George’s change to the nesting limit, but it still isn’t the same.
                  (And yes, I realise I was only there for a couple of years).

                  • It was at 10k when one could still see it. Quite a while ago.
                    Sad, maybe. Don’t care.
                    I’m passionate about our military and this subject, where else to chat about it online apart from on UKDJ, the premier UK defence site for me.
                    And with the REAL SMEs here, like Airborne, Dern, and others, of which I’m defo NOT comparable.

                    There are posters who have been here a lot longer than me as well, as with the old history it showed the years.

                    Mate, I know who you are from your 2 previous IDs, you’re one of the juniors of the site age
                    wise, yes, so course you weren’t here long before it changed.
                    Who cares? I don’t mate.
                    👍

                    • Yeah, sorry about the name changes!
                      The first one was my actual name which was suboptimal safety-wise, and I got rid of the second because it felt childish.
                      TJ seems about right at the moment.

              • It could only do that if people never ever changed IP address, which will happen every time your router is rebooted?

                • I don’t know how it worked, but it could deal with me posting for multiple devices and many different WiFi networks.

                • Don’t talk to me about Routers and Booting them, I’m in the midst of creating Bathroom excelence as SWMBO said It was time to get on with it. I did ask for another small 5 year planning and discussion period but the short, rather loud reply sort of confirmed that I was on a lost cause. Anyway fitting some lovely Acacia wood worktops using my Router, I managed to gouge a divet which led to my kicking of said router. It’s funny as all sorts of names came up too.
                  My Wife also suggested a change of address !

                    • Yes, She’s more a Psyco though. I just got yelled at because the TV Volume and Soundbar stopped working, apparently it’s all my fault that she can’t watch Love Island.
                      Women, the ain’t like normal people !

                • It depended on how silly they where. The old system tracked your posts by your email, not your username. So if you just changed your username but kept the old email it would show your posts as a oner. Eg if you registered with “stephen. poster@ gmail. com” and posted as Steve for years, but then changed your name to Stephanie, but still signed in with stephen. psoter @ gmail. com (obviously just a purely hypothetical example) the site would show all your activity and what you’d posted under what user name, regardless of your IP address.

              • It wasn’t a cyber attack, the comments system just ate huge amounts of bandwith that George had to pay for (and in turn would cause crashes as it overwhelmed his servers), so he swapped it for a feature light, but cheaper to upkeep system.

    • It’s fair to say the site owner has his predilections and light gun systems and live firing seem to be one of George’s… as well as random Scottish ship building.

      But it’s his site and it’s full of interesting and balances Defence articles so who cares if GPMGs and 30mm cannons get a higher showing than you would expect.

      • I’ve noticed the Scottish thing and the American stuff. I’d love to see more on other armed forces news, China for one. We are really in the dark here in regards to what the Chinese are doing.

        • Re china I would suggest some of the better Indian defence journals as they are a bit obsessed with chinase navel capabilities.. the other good reads are from the US naval war college as they are really obsessed with china and in no way follow the “ hell yes we can take the second world wannabes ” line that most people in the west still have… I was considering doing a write up on Chinese SSN building capabilities and the indications of latest developments around their nuclear and electric programmes..but I’m not sure I can be bothered with the level of “china are rubbish with bad demographics and not a threat” comments that it would get.

            • Deffo second that 👌👍💪 Go for it, It’s about time we saw some realistic appraisal/comparrison of fleet figures and capabilities.
              Especially if some from the MOD actually look in on here.
              Most probably think the PLAN consists of Junks and ex cold war Russian stuff.

              Time for a wake up call, It’s all very well sending a handfull of ships to their back yard and to take lots of lovely group photos with our “Mates” but let’s see what might come out to meet us if relationships went south fast.

              Feck me, I’m getting way too serious lately, must stop taking the pills !

              JJ, say something funny, get me back off the rails !

  2. I do wonder if it’s time to review both what the rivers 2s are doing, what they should be doing and what capabilities they need to do the role decided of them.

    The RN has always had a sensible policy in regards to the demarcation of major surface combatants and constabulary/patrol vessels. But this was essentially workable because it also had a policy of high low in its major surface combatant fleet, allowing it to have the numbers of major surface combatants it needed 65ish in the Cold War and 30-35 in a peaceful stable world. But it now finds itself due to over 35 years of a mix of RN,MOD and treasury incompetence and poor planning by 2028 it’s likely to have only 11 escorts in service if the type 23s keep up their present rate of decommissioning/decomposition, in 2028 that would be 4 type 23s, a type 31 and 6 type 45s. By 2030 that may have improved a bit with 3 type 26s, 2 type 31s and the last 23 operational.. but if you average out the escort numbers for the last half of the 2020s you are looking at around 11/12 escorts.

    This has forced the RN to use its OPVs in a way it has never done before and would not do, and that is essentially sending them on world wide tasking away from UK EEZs. Now this is lovely and cost effective, after all a rivers two costs 130million in capital and ( 2015 costs) is only around 3.5million a year to run vs a major surface combatant which is generally north of 500million to buy and 10-15 million a year to run and everyone is going around raving how great it is we have 2 ships in the pacific for essentially 7 million quid and don’t have to use 2 of our probably only 3-5 available escorts. I will give that in a generally peaceful and stable world of the late 1990s and 2000s that would have been a clear cost effective idea…

    BUT ( and I’m purposefully using capitalisation here) we are not in that world..we are not even in a locked in Cold War were we would get significant warning of escalation, we are in a time period when our enemies would use any and all means to attack with little to no warning and have in a case of china even stated its intention to go to war. Therefore sending constabulary vessels across the worlds oceans instead of major surface combatants is counter productive in a number of ways.. 1) it signals weakness to our enemies and does not provide deterrent 2) they lack capability to even defend themselves against moderate asymmetrical attacks.

    In the modern threat environment I would suggest even a patrol ship for your own EEZ needs the ability to defend itself against moderate asymmetrical attacks. To send a ship out into the wider threat ridden world with only a 30mm cannon, no appropriate air and surface surface search radar, no fire control radar, no modern fused or guided munitions, no appropriate capabilities to maintain a small ship flight is quite frankly a bit lame, risk laden and counter productive.

    At the same time our home waters and EEZ undersea infrastructure are at constant threat from sub kinetic attack and i. The case of war kinetic attack. Personally I think the 5 rivers 2 need a bit of a rethink in purpose and function.

    1) HMS FORT as the Falklands guard ship, in reality this ship is functioning as a stand alone patrol frigate for the south Atlantic as the APT(S) has not sent a major surface combatant to the south Atlantic in a decade. In reality outside of the British isles the south Atlantic territory is the UKs single most geostrategically important territory to the UK ( not the west or NATO but to the UK specifically) and needs to have the capability to manage that. So what does HMS FORT need capabilities wise to be a credible stand alone south Atlantic patrol ship..It’s can have its range and endurance reduced to around 4000 nautical miles as it has a very specific patrol area not a long distance from its home base and only needs to be able to cruise between territories. It needs to be able to manage air threats and general surface threats in a credible way that means it needs a proper sensor package with a 3D surface and air search radar and passive sensors as well as an appropriate self defence package, 76mm or 57mm with fire control radar and guided rounds as well as CIWS ( 30mm with air burst fused rounds) and offence based around a small ships fight.. so hanger for a wildcat as well as a set of sub surface and airborne drones that can be managed from the flight/work deck and crane and if you could manage it CAMM in ExLS ( if the Swiss can fit 32 of them on a sub 1000 ton combatant the RN can stick a few on HMS FORT)… essentially you turn HMS fort into short range patrol frigate for the Falklands and south Atlantic..that is a credible match to the navies operating in that region… funding wise you get the Falklands itself to help out and crew wise you develop a local RN reserve formation to support the extra crew needed after all even with its profoundly low tax’s the Falklands runs a budget surplus of 14-15 million a year.. essentially they could pay for the running of a patrol frigate, the Falkland are far wealthier per capita than the rest of the UK .. GDP per head of 75,000, and yet the Uk tax payer spends 110 million a year on defence of the Falklands.

    2) four rivers 2 for local EEZ monitoring and protection of underwater infrastructure. They would not need the same sensor or self defence fit as the Falklands fit and could be optimised for under sea and surface monitoring of infrastructure using autonomous systems as well as operating mine warfare systems in the EEZ.. these are 2200 ton ships with good cranes, flight decks, work decks and space for shipping containers. You can easily run plenty of autonomous Systems from them, with very little modifications. Self defence just add a 57mm and a 30mm and they can then manage any asymmetric threats that may pop up in the EEZ.

    As for the wider world the RN and HMG need to simply bite the bullet and get more frigates somehow.. letting the major surface combatant fleet decline to 11-12 vessels in the late 2020s when we face a realistic risk of general war across the globe with china, Russia, Iran, North Korea etc is essentially a dereliction of duty. Realistically the RN needs 30 escorts as soon as it can get them, we can bitch about money or crew.. but yes we can find the money and yes you can train crews quicker than the UK can build warships..but infact you need the ships to train the crews..l it’s not a chicken and egg debate..you can get the number of crews you have warships.. you cannot get the crews if you don’t have warships. but you can get warships if you don’t have a crews..so the warships have to come first… one US admiral was very clear.. without a mass of warships you cannot train crews and you loss your crews and quality of your crews.. hulls must come first as part of any workforce plan.

    What ever that plan needs to be waiting for British shipbuilding to provided a force of only 19 by 2035 is essentially bonkers.. essentially we are 10+ major surface combatants down on plans that the shipbuilding industry cannot supply within a generation.. so it’s buy secondhand or buy new off someone who is quick at building ships and will sell them… it’s a sad sad place to be but 35 years of fuckery cannot be cured in less than 20-30 years and we don’t have that time… because war may be on us in 3 years.

    I’ve always believed constabulary vessels should be constabulary vessels.. and RN warships should alway be new builds in the UK.. but we are moving into a world where even peace is essentially wartime and and world wide kinetic war can come at any moment..in this place and time those two rules simply don’t work.

  3. The Rivers came about due to incompetence in ship building plans and a constantly never learnt lesson that delay builds saves money, it never does. However the platform itself is an ideal one, capable of a multitude of taskings and jobs. A few more of the same could easily be built to complement the bigger and more capable assets by becoming a type of outstation platform. This could have an effective radar/sea ceptor capability, or an ASuW, ASM fit! Automated, either fully or partially crewed, they would be a very useful addition to a deployed fleet operating at or over the horizon. And a little bit expendable if needed.👍

  4. It’s considered news worthy that an OPV has test fired a few shells from a 30mm cannon. Hard to know whether to laugh or cry.

    • I once complained that tug movements weren’t really newsworthy and rightly got slapped down. Just because one person finds it drops below their threshold of interest doesn’t mean it doesn’t interest the author. The journal is free. Even if we fling in an odd tenner, editor’s choice is final.

  5. The rivers: if it can be done, a way of jamming unfriendly drones would be welcome as well as making more use of our own drones. Think there’s general agreement that the rivers are meant for police role, basic and very cost effective.

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