Two berthed submarines are clearly visible in this Google Earth image of the Royal Navy base at Faslane, Scotland.
A wider view from Google Earth of the Royal Navy nuclear-submarine base at Faslane, Scotland.
An overview of the Trident missile storage facility near Coulport, Scotland, across Gare Loch from the Faslane nuclear sub base.
A Google Earth close-up of what may be nuclear-missile storage sheds near Coulport, Scotland.
Britain's nuclear defense headquarters could be under threat from terrorists using Google Earth.
Close-up aerial views of the top-secret naval base are on the computer program — available for free over the internet.
It even reveals the longitude and latitude of the facility in Faslane, Scotland — home to the U.K.'s Trident-armed nuclear submarine force.
And pictures clearly show two vast Vanguard Class submarines — each capable of carrying 16 nuclear missiles.
Military experts warn that would make it easy for terrorists to launch accurate mortar or rocket attacks.
One told The Sun: "A strike on our nuclear capability would cause untold devastation. Terrorists could have a field day, knowing exactly where to aim strikes to cause the maximum devastation."
As well as HM Naval Base Clyde at Faslane, the program also clearly shows the Trident Special Area near Coulport, just 10 miles away, where nuclear warheads are stored.