Royal Navy Submarines Fight Drones With Water Cannons

Royal Navy crews are undergoing training to combat drones using high-pressure water jets, an unusual tactic deployed from nuclear submarines. This method provides an inexpensive, environmentally friendly emergency defense when drones breach existing security. Sailors at HMNB Clyde in Scotland are learning to operate firefighting hoses, directing concentrated water streams at approaching unmanned aerial vehicles.

The Vanguard-class submarines, each valued at approximately £4 billion, are equipped with handheld nozzles for this purpose. This system is intended to counter small and medium-sized FPV drones that evade other defenses. While lacking advanced detection capabilities, the water jets offer crews an immediate response option in dire situations.

This defensive strategy is particularly relevant for submarines operating or docked at HMNB Clyde, which is situated near Gare Loch. The surrounding terrain presents vulnerabilities, potentially allowing for close-range drone attacks with reduced warning times. The Ministry of Defence is investing £470 million over four years to enhance security across military sites.