UK Nuclear Sub Crews Train to Fight Drones With Fire Hoses

A £4 billion submarine, defended by a hose

The image is hard to shake: a vessel carrying Trident II D5 nuclear missiles, built at a cost of roughly £4 billion, with a sailor on deck pointing a fire hose at the sky.

According to a report in The Sun, Royal Navy submariners stationed at HMNB Clyde in Scotland are being trained to use high-pressure firefighting hoses against small and medium-sized FPV drones. The hoses use handheld nozzles with pistol-grip controls, letting sailors direct concentrated jets of water at approaching aircraft in an attempt to knock them down or push them off course.

The appeal is obvious. Fire hoses are already aboard, cost nothing extra to deploy, and leave no debris or chemical residue. They are also entirely manual: no radar, no tracking, no automation. A naval source quoted in the report was blunt about the trade-off, saying that in a dire situation "you have to use what you've got."

That sentence captures the mood. This is not a replacement for proper counter-drone systems. It is what happens when a base's existing layers of defence are breached and someone needs to do something immediately.

Why HMNB Clyde is exposed

Geography is the problem. HMNB Clyde sits beside Gare Loch, a narrow Scottish waterway that narrows to about one kilometre across in places.

Nearby hills and roads give hostile operators launch points within short flight distance of the base. That compresses the time defenders have to detect, identify and intercept a drone, which is exactly the window where conventional systems can fail and improvised measures take over.

The Ministry of Defence says military sites rely on multiple layers of protection, including physical barriers, patrols, surveillance equipment and counter-drone systems. It has also announced £470 million in additional spending over four years to upgrade security across UK defence sites.

The concern is not theoretical. Underwater sensors were previously found near routes used by British submarines leaving the Scottish base, suspected of links to Russian monitoring efforts, though their origin has not been confirmed.

The real gap: cheap drones versus expensive ships

The fire hose story is funny until you think about the asymmetry behind it.

A quadcopter costs a few hundred pounds. A Vanguard submarine costs around £4 billion and carries the UK's strategic nuclear deterrent. Any defence that relies on a sailor spotting a drone and hitting it with a jet of water is a sign that the cheap end of aerial warfare is outrunning the expensive end of naval protection.

That is not a uniquely British problem. Navies and armies worldwide are wrestling with how to defend fixed and slow-moving targets against small drones without spending a fortune on interceptors. Guns, nets, jammers and now hoses all sit in the same improvised tier.

The hose has one genuine advantage: it is always there. When electronic countermeasures fail or a drone slips through, a crew still has a physical option. Whether it works in practice depends on reaction time, aim and luck.

What it means for you

This is a UK defence story, so there is no consumer product or price attached. The relevant detail for readers in the US, UK and EU is that military bases near populated or accessible terrain are investing in layered drone defence, and the improvised measures described here are a fallback rather than a substitute for proper systems.

The MoD's £470 million security programme is already funded, but individual base upgrades and timelines have not been published. Treat the fire hose tactic as a stopgap while those investments land.

The fire hose will not stop a determined drone attack on its own, and nobody in the Royal Navy is pretending otherwise. But it is a vivid reminder that the drone threat has reached the most sensitive corners of defence, and that the gap between cheap attack and expensive defence is now a problem measured in water pressure.