Spacin' ain't easy

Constitution Class Starships (via Wikipedia)

 

Name	Registry	Depiction
USS Constellation	NCC-1017	Commanded by Commodore Matthew Decker. Scuttled to destroy a planet-eating machine.[30]
USS Constitution	NCC-1700	"Class Leader" - First ship in class upon which all Constitution-class vessels are based.
USS Defiant	NCC-1764	Taken to Mirror Universe by Tholians, in "The Tholian Web".[31] Captured by crew of ISS Enterprise (NX-01) and used in service of the Terran Empire, in "In a Mirror, Darkly".[32]
ISS Enterprise	NCC-1701	Mirror Universe version of the USS Enterprise, in "Mirror, Mirror".[33]
USS Enterprise	NCC-1701	Originally commanded by Robert April (2245–2250) Christopher Pike (2250–2265) James T. Kirk (2265-2270, 2271–2285) Willard Decker (2270-2271) (ship's stint during refit up to V'Ger incident). Spock (ship's stint as academy training vessel and during the Khan Noonien Singh incident 2282-2285) Vessel's self-destruction carried out while in orbit of the Genesis Planet, to prevent ship from falling into Klingon hands.[34]
USS Enterprise(Alternate timeline created by Nero)	NCC-1701	Originally commanded by Christopher Pike (launched 2258), then James T Kirk.[35]
USS Excalibur	NCC-1664[1]	Severely damaged, and crew killed, during Richard Daystrom's M5 computer test.[36]
USS Exeter	NCC-1672[1]	All crew lost killed by alien disease except Caption Ronald Tracey who was on the planet surface when the disease struck the crew Captain Tracey was arrested after fight with Captain James T Kirk for violation of the Prime Directive.[37]
USS Farragut	NCC-1647[1]	Ship on which James Kirk served as a phaser station operator.[38] Attacked by the Dikironium Cloud Creature, killing half the crew.[38] In the 2009 movie, Nyota Uhura was originally assigned to the USS Farragut but she argued with Spock to be transferred to the USS Enterprise instead. The ship never appeared on screen and was never given a class or registry number; both come from the Star Trek Encyclopedia.[1]
USS Hood	NCC-1703[1]	Participates in Richard Daystrom's M5 computer test.[36]
USS Intrepid	NCC-1631[1]	All-Vulcan crew killed by a giant, spacegoing single-celled animal.[39]
USS Lexington	NCC-1709[1]	Participates in Richard Daystrom's M5 computer test.[36]
USS Potemkin	NCC-1657[1]	Participates in Richard Daystrom's M5 computer test.[36]
USS Yorktown	NCC-1717.	Disabled by alien probe.[40]
USS Pegasus	NCC-1702.	Patrolled the Klingon neutral zone.[41