LONDON -- A British nuclear submarine ran aground off Scotland's Isle of Skye, suffered considerable damage to its sonar and a ballast tank and will need several months for repairs, a navy spokeswoman said Friday.

The HMS Trafalgar limped into the Clyde naval base Thursday, one day after hitting rocks while traveling underwater during a two-week training exercise with other British and NATO vessels.

Two of the 130 crewmen aboard the submarine were injured. The submarine was not carrying nuclear weapons, and its nuclear reactor suffered no damage.