Skerth spaceship (The Curse of the Black Spot)

This unnamed spaceship had crashed in the same place as Henry Avery's ship, the Fancy, but in a different dimension.

Features
The ship had at least two crew members, as well as an artificial doctor. There was a medical station where the doctor could treat patients, keeping them alive and unconscious even in usually fatal conditions. (DW: The Curse of the Black Spot)

History
The spaceship accidentally became trapped in the same space as the Fancy, with any reflective surface acting as a portal to the other dimension. Though it gave out a distress signal, a disease somehow crossed over from Earth to the crew, killing them. The ship's artificial doctor began taking injured crew from the Fancy and transporting them to the spaceship for treatment. The crew of the Fancy thought the artificial doctor was a Siren.

The Eleventh Doctor came to investigate the distress signal, but landed on the Fancy instead. Despite his efforts, the Siren continued to take the crew until the Doctor decided to go with it. Once on the spaceship, he realised the truth and released the crew of the Fancy. They took the spaceship for themselves, setting off for the Dog Star. (DW: The Curse of the Black Spot)