Horizon class

The Horizon-class was a type of cruiser in service during the 22nd century. Similar in appearance to the ships of the Earth Starfleet that were later integrated into the Federation Starfleet, the Horizon class was larger.


 * It is unclear as to which Horizon — or Horizon-class — was the ship that left the book Chicago Mobs of the Twenties on Sigma Iotia II. 

The spaceframe of the Horizon-class USS would be used to construct the prototype.

The Horizon-class USS was later rebuilt as a heavy cruiser, hence the low registration number in comparison with most other vessels of the Constitution class. (Enterprise Evolution Plans)