Galaxy class
From Tardis Wiki, the free Doctor Who reference
Galaxy class was a rating for a passengerstarship. Large and luxurious, they could go for years between planet
fall and typically could produce their own air. They were in use in the 44th and 51st centuries.
The Thrasymachus was a Galaxy Class starliner on which Amy Pond and Rory Williams honeymooned. It almost crashed until the Eleventh Doctor and Kazran Sardick had Abigail Pettigrew sing the skies calm. (DW: A Christmas Carol)
The Byzantium was a Galaxy Class starship that Weeping Angels crashed onAlfava Metraxis. (DW: The Time of Angels)