For other uses, see T'Plana-Hath.

T'Plana-Hath was the prototype vessel for the T'Plana-Hath-class of surveyor starships, launched from Vulcan in 2053. Under the command of Solkar in 2063, the T'Plana-Hath landed near Bozeman, Montana on Earth and established the first official contact with humans following the flight of the Phoenix. (ST movie: Star Trek: First Contact; Decipher RPG module: Starships; CCG set: First Contact, card: "Vulcan Lander")

According to one account, the T'Plana-Hath was studying potential wormhole eddies that could be created by the interaction of Jupiter and Sol when it detected Zefram Cochrane's warp flight and changed course to investigate. (TOS novel: Preserver)

The crew of the T'Plana-Hath' reported back to their people that Human music was "physically painful" to listen to. (DS9 short story: "First Steps")

The Last Unicorn RPG module: The Way of Kolinahr: The Vulcans stated that it was the Vesaya under the command of Sevak that encountered Earth. Its possible that since the T'Plana-Hath was a class of surveyor ships, it might have been stationed onboard the Vesaya though this is speculation.