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Ambassador-class Enterprise-C from TNG "Yesterday's Enterprise"

The Ambassador-class is a model of Federation starship developed in the late 23rd or early 24th century.

Technical Data

The USS Ambassador.

There is little technical information available on the Ambassador-class. In an alternate timeline, the crew of the Enterprise-D described the Ambassador-class Enterprise-C as a little old, but still serviceable in their dwindling fleet[1]. Commander Data once described an Ambassador-class starship as a "heavy cruiser" [2]. The Ambassador-class has ten phaser arrays[3].


The Ambassador-class starship USS Enterprise responded to a distress call from a Klingon outpost that was under attack by four Romulan warbirds. The Enterprise was destroyed in the battle, but the Klingons regarded their actions as honorable, and the incident paved the way for the formation of an alliance between the Federation and the Klingon Empire.

Unit Run


  • USS Ambassador (NCC-10521)
  • USS Horatio (NCC-10532)
  • USS Enterprise (NCC-1701-C)
  • USS Zhukov (NCC-26136)
  • USS Valdemar (NCC-26198)
  • USS Yamaguchi (NCC-26510)
  • USS Excalibur (NCC-26517)
  • USS Exeter (NCC-26531)
  • USS Adelphi (NCC-26549)
  • USS Gandhi (NCC-26632)



  1. TNG "Yesterday's Enterprise"
  2. TNG "Conspiracy"
  3. The number of phaser arrays on the physical model.
  4. Star Trek Typhon Pact - Rough Beasts of Empire
  5. Dominion War novel - Behind Enemy Lines
  6. TNG video game: A Final Unity
  7. TLE novel: The Buried Age
  8. TNG novel: Losing the Peace; SCE novel: Out of the Cocoon
  9. DS9 novel: Antimatter
  10. TNG novel: A Time to Die
  11. TNG novel: The Haunted Starship; Double Helix: Double or Nothing
  12. DS9 video game: Crossroads of Time
  13. TNG novel: A Time to be Born
  14. TLE novel: The Buried Age