The USS Enterprise (NCC-1701-A) was a 23rd century Federation Constitution-class starship operated by Starfleet. In the alternate reality, this was the second Federation starship seen to bear the name Enterprise.
Construction of this ship at Starbase Yorktown was underway in 2263, during which it was noted to be the only ship more advanced than the USS Enterprise. It was completed following the destruction of the USS Enterprise during the Battle of Altamid, when it was named in honor of its predecessor and given to Captain Kirk and his crew in recognition of the fact that, since the battle, Kirk and his senior officers had managed to defeat Krall. (Star Trek Beyond)
|The Starships Enterprise|
|United Earth: XCV 330 • NX-01|
|Federation: NCC-1701 • NCC-1701-A • NCC-1701-B • NCC-1701-C • NCC-1701-D • NCC-1701-E • NCC-1701-J|
|Terran Empire (Mirror Universe): NX-01 • NCC-1701|
|Federation (Alternate Reality): NCC-1701 • NCC-1701-A|
- Star Trek Beyond (First appearance)
The USS Enterprise-A was designed by Sean Hargreaves, who described it as “evolutionary rather than revolutionary” in its relationship to its predecessor (which had been designed by Ryan Church). Hargreaves also stated that the Enterprise-A was designed with the vulnerabilities of the previous Enterprise being reinforced and visual nods to the original Enterprise (designed by Matt Jefferies) being included, such as changing the rim of the saucer from a near-vertical angle to a near-45 degree angle. 
According to Hargreaves: "The brief was to beef up the neck and arms, but I took it upon myself to go further... I worked many long hours at work and after work and weekends on this, knowing the weight of the responsibility, which I didn't take lightly." 
Like the prime reality refit Constitution-class Enterprises, the USS Enterprise-A also has its name inscribed on the ventral side of the primary hull. The ship's registry number is listed above the name in a manner highly similar to the prime reality's Galaxy-class USS Challenger (NCC-71099).