British warship unleashes hail of gunfire in the Arctic

Royal Navy destroyer HMS Duncan has carried out live firing training while deployed on Arctic Sentry, with the ship marking the anniversary of the founding of the Royal Navy’s Engineering Branch by putting the work of her weapons engineers to the test.

The Type 45 destroyer shared images of the gunnery serial on social media, showing her guns in action and rounds falling around an inflatable training target, known in the fleet as a killer tomato, bobbing on a grey sea. “Every round fired starts long before the trigger is pulled. On the anniversary of the founding of the RN Engineering Branch, today was a reminder of the role our Weapons Engineers play in delivering capability at sea. Proud of the team keeping HMS Duncan ready,” the ship posted on X.

The post makes the point that since every serviceable weapon on a warship represents the unglamorous work of maintainers long before a round leaves the barrel, from the technicians testing circuits and greasing mounts to those managing the magazines below, and the ship chose the branch anniversary to give her weapons engineering department the credit usually collected by whoever pulls the trigger.

It’s a fair note in a week when this publication has made the case that routine gunnery deserves reporting precisely because it evidences a fleet training to fight.

Every round fired starts long before the trigger is pulled.

On the anniversary of the founding of the RN Engineering Branch, today was a reminder of the role our Weapons Engineers play in delivering capability at sea.

Proud of the team keeping HMS DUNCAN ready.#ArcticSentry pic.twitter.com/CYlJhvPE4v

— HMS Duncan (@HMSDuncan) July 19, 2026

Duncan, the sixth and final Type 45, is deployed on Arctic Sentry, the NATO activity focused on the High North, where the destroyer’s Sea Viper air defence system offers the capability the class was built around, protecting a force against aircraft and missiles. Her guns cover the closer-in problem, with the class carrying a 4.5 inch main gun along with 30mm small calibre guns and close-in weapon systems for surface threats and last-ditch air defence, and serials like this one keep gun crews, operations room teams and maintainers current on weapons that demand live practice.

Now, let’s be honest with ourselves here, for those scoffing at this article. This is a minor event, and a very routine one. Warships fire their guns in training all the time, and some readers may, as I said, scoff at reporting it at all. But I think it’s good to do precisely because of that. At a time when much of the coverage of the Royal Navy, including our own, focuses on hulls being retired, availability problems and gapped capabilities, it is easy to lose sight of the fact that the fleet is still at sea, still conducting the unglamorous training serials that keep a warship ready to fight.

A British warship putting rounds out is not a headline event, but it is really the bread and butter of a navy that intends to remain a fighting force, and that is what we are here to report.

The deployment continues a busy northern period for the Royal Navy, which has held command of NATO’s Allied Reaction Force (Maritime) since earlier this month, with HMS Prince of Wales recently conducting NATO air policing from the Norwegian Sea, where her F-35s intercepted Russian long-range aircraft, and Duncan’s presence in the High North adds the air defence picture to that activity.