Parece improvável que o navio tenha sido construído por The Silence, já que eles precisavam de humanos para construir um simples traje espacial para eles. Nós ainda não sabemos de onde o navio vem. Spoilers for Um bom homem vai à guerra .
However, given the child regenerated at the end of the Day of the Moon is likely River, grown up a bit after the events of A Good Man Goes To War, and Kovarian wishes to use River as a weapon against the Doctor, it seems possible that Kovarian constructed that ship. It's an attempt to make a TARDIS, and a weapon against the Doctor could definitely use a way to travel through space and time in a manner similar to the Doctor.