The USS Tundra (NCC-65810) was a Nebula-class starship. John Greene commanded this ship for periods of time in 2370 and 2371. In 2372, the Tundra arrived at Deep Space 9 to tow the USS Prospect-A back to Earth. Sill and several other Prospect crew left for Earth aboard the Tundra. (Star Trek: The Prospect Chronicles: "Directive")