| Universe : | Prime Timeline | 
| Affiliation : | Humans | 
| Class Name : | SS Enterprise Class | 
| Type : | Starship | 
	
	| Unit Run : | SS Enterprise - Destroyedplus 5 others built in total. 6 have been retired from service.
 | 
	
| Commissioned : | In service with Humanity 2098 | 
| Dimensions : | Length : 150 m [1] Diameter : 116 m
 Decks : 2 exclus
 | 
| Mass : | 77,000 metric tons | 
| Crew : | 21 | 
| Defence Systems : | Light Monotanium Single hull. Low level Structural Integrity Field
 | 
| Warp Speeds (TOS scale) :
 | Normal Cruise : 1.2 Maximum Cruise : 1.21
 Maximum Rated : 1.22  for 1 hours.
 
 | 
| Strength Indices : (Galaxy class = 1,000)
 | Beam Firepower : - Torpedo Firepower : -
 Weapon Range and Accuracy : -
 Shield Strength : -
 Hull Armour : 0.31
 Speed : 1
 Combat Manoeuvrability : 1,140
 | 
| Overall Strength Index : | 10 | 
| Diplomatic Capability : | 1 | 
| Expected Hull Life : | 36 | 
| Refit Cycle : | Minor : 2 year Standard : 2 years
 Major : 18 years
 | 
Notes
The SS Enterprise began life as a Vulcan starship, and has the ring  nacelle and axial hull configuration characteristic of many Vulcan designs.  Seven of these vessels were donated to Humanity by the Vulcans in 2098 in order  to allow passengers and cargo to be flown between Earth and the Alpha Centauri  colony.   
  In Vulcan service the ship was capable of speeds of warp factor 4, but the nacelles  were modified to reduce the speed to warp 1.2 as part of a "capability  realignment" refit prior to the transfer of ownership. This was intended,  in the words of the Vulcan ambassador, to "bring the vessel's specification  to a level compatible with the capabilities of its operators".  
  Although no more capable than Human designs of the period in terms of speed,  range, snesor capability, etc, the Enterprise class was considerably more reliable  than Human craft and the ships proved popular with their crews. As newer cargo  vessels such as the J and Y class came into service with top speeds reaching  warp 1.8, the Enterprise class were gradually phased out and the last was retired  in 2130.
Colour key
References
| # | Series | Season | Source | Comment | 
| 1 |  |  | Speculative | Rough guess. Since this ship pre-dates the 'Enterprise' era, I have assumed this ship to be somewhat smaller than a typical Enterprise ship. | 
Comments
This is one of those entries that is virtually all speculation. All we know  of this class, canonically speaking, is that it exists and looks approximately  like the image on the size comparison link. The ship was seen on the wall of  the Recreation Deck of the USS Enterprise in "Star Trek : The Motion Picture";  when Decker is showing the Ilea probe around the ship, he comes to a display  showing several pictures and announces that all of the ships were named Enterprise.  One image shows a sailing ship, one a World War II aircraft carrier, another  the space shuttle, another shows this ship and the last shows the Enterprise  as it appeared in the Original Series. The first three are indeed accurate (or  reasonably so) representations of past vessels named Enterprise from the real  world. Archer's NX-01 Enteprise is notable by its absence - presumably the wall  does not show a comprehensive list.  In reality, of course, the makers of TMP didn't know about Archer's ship since  it lay several decades in the future, whilst the makers of Enterprise care far  more about having a 'cool' ship than they do about having one which fits into  the time it is placed in. The SS Enterprise design was actually created for  a science fiction series Roddenberry intended to make after TOS; the show never  made it to the screen, but the design was stuck into TMP anyhow.  The idea that this Enterprise was a Vulcan ship is an assumption made because  of the design of the ship. The Vulcan Surak and Apollo classes both have ring  nacelles surrounding an axial hull, while the Surak has the same single connecting  strut between the two. Certainly the SS Enterprise design owes more to this  type of ship than it does to Archer's Enterprise or any other known Human vessel.  That the Vulcans would downgrade the ship before handing it over would be in  line with the nastier, more evil Vulcans of the Enterprise era. The size is  totally speculative, as is everything else about the ship.