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The Akira class is a relatively large type of starship with heavy armament. The warp pylons are swept downward and are affixed at their upper ends to two catamaran-like secondary hulls which run into the top of the saucer section. A weapons module is located at the top between the two secondary hulls. The Akira has two shuttlebay doors at the rear and one central door at the front end of the saucer section. Seen in First Contact battling a Borg Cube and in DS9

Known Ships:                                                        

USS Akira NCC-62497
(Name unknown) NCC-63646
USS Rabin NCC-63293
USS Spector NCC-65549
USS Thunderchild NCC-63549

Class Specifications:

Heavy cruiser
Length: approx. 440m
First commissioned in 2365

The Ambassador class is a bulky starship type equipped for scientific missions as well as for combat. The class appears to be an intermediate design between the Excelsior and Galaxy classes. First launched in the early 24th century, the Ambassador is now among the aging ship designs

Known Ships:                                         

USS Adelphi NCC-26849 
USS Ambassador NCC-10521
USS Enterprise NCC-1701-C
USS Excalibur NCC-26517
USS Exeter NCC-26531
USS Gandhi NCC-26632
USS Horatio NCC-10532
USS Valdemar NCC-26198
USS Yamaguchi NCC-26510
USS Zhukov NCC-26136

Class Specifications:

Heavy cruiser
Length: 526m (Enterprise-C), approx. 526m (Zhukov)

The Challenger class is obviously a newer ship design. It combines an almond-shaped saucer similar to that of the Galaxy with two nacelles above and beneath the small engineering hull.

Known Ships:                                                                  

USS Armstrong NCC-57537
USS Buran NCC-57580
USS Kearsarge NCC-57566

Class Specifications:

Length: approx. 390m

The Cheyenne class is one of the few ship designs with four warp nacelles. The saucer hull is elliptical, but smaller than that of the Galaxy class.

Known Ships:                                           

USS Ahwahnee NCC-71620/NCC-73620

Class Specifications:

Length: 362m

Unlike other Starfleet ships, the Defiant class is primarily designed for combat. It was developed in order to fight the Borg. Besides conventional weapons the ship has pulse phaser cannons and quantum torpedo launchers. While further ships of this class have been built in the meantime, the USS Defiant probably remained the only one with a Romulan cloaking device and was still in experimental status at the time of its destruction.

Known Ships:                                      

USS Defiant NX-74205
USS Valiant NCC-74210
USS São Paulo NCC-75633

Class Specifications:

Escort vessel
Length: approx. 120m
Deck count: 4
Max. speed: Warp 9
Crew complement: 47
First commissioned in 2370

The Excelsior NX-2000 was originally equipped with an experimental transwarp drive. A large number of Excelsior-class starships was built over a period of more than 60 years. Excelsior-class ships incorporate two shuttlebays in the engineering hull stern and keel. The Excelsior design is still in use as of the year 2376. A refit of this class allows USS Enterprise NCC-1701-B and USS Lakota NCC-42768 to be built.

Known Ships:                                          

USS Al-Batani NCC-42995
USS Berlin NCC-14232
USS Cairo NCC-42136
USS Charleston NCC-42285
USS Crazy Horse NCC-50446
USS Crockett NCC-38955
USS Enterprise NCC-1701-B (refit)
USS Excelsior NX-2000/NCC-2000
USS Fearless NCC-14598
USS Frederickson NCC-42111
USS Gorkon NCC-40521
USS Grissom NCC-42857
USS Hood NCC-42296
USS Intrepid NCC-38907
USS Lakota NCC-42768 (refit)        
USS Lexington NCC-14427            
USS Livingston NCC-34099
USS Malinche NCC-38997
USS Melbourne NCC-62043
USS Okinawa NCC-13958
USS Potemkin NCC-18253
USS Repulse NCC-2544
USS Roosevelt NCC-2573
USS Tecumseh NCC-14934
USS Valley Forge NCC-43305

Class Specifications:

Heavy cruiser
Length: 467m (original), 469m (refit)
First commissioned in 2284

The Freedom class is a newer starship design, incorporating an ellipsoid hull and one Galaxy-type warp nacelle. Built for scouting, it has limited weapons capacity.

Known Ships:                                    

USS Concorde NCC-68711
USS Firebrand NCC-68723

Class Specifications:

Length: 430m

The Galaxy class is the result of an ambitious development program at Utopia Planitia Fleet Yards. It is the largest and most complex Starfleet starship built to date. The Galaxy class is primarily designed to replace the aged Ambassador and Oberth classes in research missions. Galaxy-class starships feature a detachable and independently operational saucer section, three shuttlebays and a captain's yacht at the bottom of the saucer.

Known Ships:                                                            

USS Challenger NCC-71099
USS Enterprise NCC-1701-D
USS Galaxy NCC-70637
USS Magellan
USS Odyssey NCC-71832
USS Venture NCC-71854
USS Trinculo NCC-71867
USS Yamato NCC-71807

Class Specifications:

Explorer
Length: 642m
Deck count: 42
Max. speed: Warp 9.2 (cruise)
Crew complement: 1014
First commissioned in 2357

First introduced around 2370, the Intrepid class is among the fastest starships of the fleet. It features bioneural computer components and a variable geometry warp field which is accomplished with folding warp pylons.

Known Ships:                                    

USS Intrepid NCC-74600
USS Bellerophon NCC-74705
USS Voyager NCC-74656

Class Specifications:

Length: 344m
Deck count: 15
Max. speed: Warp 9.975
Crew complement: 141

Nebula starships are about the same size as Galaxy-class vessels. The saucer hulls and the warp nacelles of the two classes are substantially identical. The Nebula class has a more compact arrangement of the hull components, however, it is equipped with an additional sensor module. Variants of the class are shown in the picture below.

Known Ships:                                            

USS Bellerophon NCC-62048
USS Bonchune NCC-70915
USS Endeavour NCC-71805
USS Farragut NCC-60597
USS Hera NCC-62006
USS Honshu NCC-60205
USS Leeds NCC-70352
USS Lexington NCC-61832
USS Melbourne (Prototype II)
USS Merrimack NCC-61827
USS Monitor NCC-61826
USS Phoenix NCC-65420 (Phoenix variant)
USS Prometheus NCC-71201
USS Proxima NCC-61952
USS Sutherland NCC-72015
USS T'Kumbra
USS Ulysses NCC-66808

Class Specifications:

Explorer
Length: 440m (Farragut), 465m (Phoenix), 525m (prototype I,III), 535m (prototype II)
Max. speed: Warp 9.5

The Niagara is a large three-nacelled starship that has probably been built over a period of some decades.

Known Ships:                                    

USS Princeton NCC-59804
USS Wellington NCC-28473

Class Specifications:

Length: approx. 480m

Few facts are available on the Norway class. The main hull resembles a flat-iron, the secondary hull consists of two wing-shaped warp pylons with a gap in between. Instead of phaser strips this class has a phaser cannon installed in the bow.

Known Ships:                                   

USS Budapest NCC-64923

Ship Specifications:

Length: approx. 335m

The Nova class is a small science vessel with a crew complement of about 80.

Known Ships:                                          

USS Equinox NCC-72381
USS Rhode Island NCC-72701 (variant)

Ship Specifications:

Length: approx. 180m
Deck count: 8
Crew complement: 80

The Prometheus is the prototype of a multi-vector assault vessel, designed for deep-space tactical assignments. In combat, the ship splits into three parts, namely the top and bottom halves of the engineering hull with two warp nacelles each, and the primary hull which is also equipped with two small extendable warp engines. The single parts are heavily armed; furthermore the ship features regenerative shielding and ablative hull armor. The bottom picture shows the separation.

Known Ships:                                                

USS Prometheus NX-59650
USS Prometheus NX-74913

Class Specifications:

Length: 415m
Deck count: 16

The Saber class is a small, but well armed starship type. Its warp nacelle tips are attached to the unconventional irregularly shaped primary hull. The secondary hull is comparatively voluminous and holds the navigational deflector.

Known Ships:                            

USS Yeager NCC-61947

Class Specifications:

Length: approx. 172m

The Sovereign class is the longest known ship type of the fleet. In spite of this, its internal volume is less than that of the Galaxy or of the Ambassador class. In 2373, the Sovereign-class Enterprise-E is said to be the most advanced ship of Starfleet. Its weapons include quantum torpedoes which are fired from a module at the bottom of the saucer hull and various other locations. The Sovereign class also has a warp-capable captain's yacht.

Known Ships:                                  

USS Enterprise NCC-1701-E

Class Specifications:

This ship design has a similar saucer as the New Orleans and similar nacelles as the Cheyenne, and it appears to be at least some 20 years old.

Known Ships:                                   

USS Chekov NCC-57302

Class Specifications:

Length: approx. 325m

The Steamrunner class is an unconventional design with warp nacelles partially embedded in a highly irregularly shaped saucer section. The navigational deflector is located in a separate housing between the aft ends of the nacelles. The Steamrunner is obviously heavily armed.

Known Ships:                                                 

USS Appalacia NCC-52136
USS Hiroshima

Class Specifications:

Length: approx. 355m

Sydney-class starships are relatively large personnel transport vessels. They employ similar bridge modules and the same warp nacelles as the Constitution and Miranda classes. These ships were introduced at the end of the 23rd century and are still in active service by 2373.\

Known Ships:                              

USS Jenolan NCC-2010
USS Nash

Class Specifications:

Personnel transport
Length: approx. 235m