Britain's top secret nuclear submarine base in Scotland can be seen using basic technology through Google Earth.
The base can be seen in such detail that two Vanguard Class submarines, which carry up to 16 nuclear missiles, can be identified in the pictures.
It also gives the exact longitude and latitude of the base in Faslane, Scotland.
According to a report in the Sun, experts warn that being able to identify where these bases are would make it easy for terrorists to launch accurate mortar or rocket attacks.
"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," one told the newspaper.
Google Earth also shows where nuclear warheads are stored. It also reveals the SAS training facility in Hereford.
The government demanded Google blot out British bases in Iraq after a terrorist held in Basra was found with a Google Earth map
Google also blocked out the Trident base but, according to the Sun, the locations have become visible again following updates to Google Earth.
"We do everything to protect bases but it is impossible to control all websites providing satellite imagery," an MoD spokeperson told the Sun.
"If people are really determined to target these sites they can find these images and there is nothing we can do to stop them."