Yorktown class

The Yorktown-class was a series of United Earth battleship starships in Earth Starfleet service around the time of the 22nd century. The Yorktown-class was commissioned as an early-model Human military vessel.

Specifications
In 2159, these vessels were equipped with two phase banks and five torpedo launcher bank, and were protected by polarized hull plating. 

Known vessels
USS Washington (NCC-403) • USS Adams (NCC-410) • USS Wilson (NCC-416) • USS Shoemaker (NCC-422)

Background
No explanation is given for these vessels' Federation Starfleet-style registry numbers and their use of the "USS" name prefix, despite existing two years before the inception of the Federation.

The game software included numerous other names for ships of this class that were not prepared to be used in gameplay, and are hidden in the game's source code, including USS Aurbach, USS Boston, USS Commonwealth, USS Concord, USS Fenway, USS Liberty, USS Paul Revere. Possibly, these vessels were intended for some feature of the game that was not completed. For example, none of these ships are coded with registry number graphics like those the included ships possess.