And according to satellite pictures published two years ago, on the far side of a peninsula that juts into the bay lie the cavernous entrances to a vast underground submarine base.

两年前发布的卫星照片显示，在伸入海湾的半岛远端，还坐落着一座洞窟似的入口，通往巨大的地下潜艇基地。

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The submarine headed back to its base on the Kola Peninsula, by the Barents Sea, which took five hours.

BBC: Eyewitness: Tragedy of Soviet nuclear submarine K-27