A Dalek saucer, commanded by a saucer commander, was used by the Daleks to destroy Earth satellites during the Cold War, hoping the Americans and the Russians would blame each other and the conflict would escalate. The saucer landed at the bottom of the ocean, sealed within a pressure dome, where it was to wait until the Daleks saw the perfect moment to strike. However, it was infiltrated by the Third Doctor who contacted a submarine, the HMS Pandora, and ordered it to fire on the ship. The Daleks died as the ship flooded. (COMIC: The Threat from Beneath)
Tardis