Ref: Daystrom Institute Technical Library
                                            Galaxy Class-Explorer - Uprated   
Unit Run:
   41 others built in total. 10 have been lost during and before the war, leaving 31 in service. The      above list includes both basic and uprated Galaxy class vessels; Starfleet refuses to specify precisely   which ships are uprated. Civilian sources indicate that 18 ships were of the basic model, of which 4     have been lost in total.   
Commisioned:
    2362 - present   
Dimensions:
    Length : 641 m
    Beam : 470 m
    Height : 145 m
    Decks : 42   
    Mass :  5,125,000 tons   
Crew:
    400 Starfleet; typically no families carried   
Armament:
    14 x Type X Phaser arrays, total phaser output 70,000 TeraWatts
    3 x Type 3 burst fire photon torpedo tubes + 275 torpedoes
    Antimatter spread emitter   
Defence Systems:
    Shield system, total capacity 5,103,000 TeraJoules
    Standard Duranium/Tritanium double hull plus 9.0 cm High Density armour.
    Standard level Structural Integrity Field   
Warp Speeds:
(TNG Scale)
    Normal Cruise : Warp Factor 6
    Maximum Cruise : Warp Factor 9.2
    Maximum Rated : Warp Factor 9.9 for twelve hours   
Strength Indices:
(Galaxy class = 1,000)
    Beam Firepower : 1,400
    Torpedo Firepower : 1,000
    Weapon Range and Accuracy : 1,220
    Shield Strength : 1,890
    Hull Armour : 1,000
    Speed : 1,601
    Combat Manoeuvrability : 1,000   
    Overall Strength Index : 1,355
Diplomatic Capability:   
    Grade 7   
Expected Hull Life:
    100 years   
Refit Cycle:
    Minor : 1 year
    Standard : 5 years
    Major : 20 years   


Notes: The uprated Galaxy class has been fielded by Starfleet in order to increase the combat capability of the class for service in the Dominion war. The improvements include an extra pair of phaser arrays mounted on the nacelles, an increase in the maximum speed to Warp 9.9, a Sovereign Class Bridge Module and various other enhancements.  As with the Nebula class, Starfleet refuses to comment on which Galaxies are enhanced and which are not.
The Galaxy class was developed to replace the ageing Ambassador and Oberth class starships as Starfleets primary exploration vessel. The design was initiated in 2343 with a highly challenging specification which called for a ship based on the Nebula design then being developed, but equally capable of scientific, exploration, diplomatic, cultural, and combat roles all within a single multi-mission hull. In fact, many came to regard the requirement as too challenging; the project suffered from numerous delays due to a wide range of design, manufacturing, and construction problems. The first of the class, the USS Galaxy, was launched in 2357 and commissioned in 2362, nearly two decades after initial approval. The USS Galaxy which emerged from the Utopia Planitia shipyard had very similar lines to the Nebula class. The Galaxy is slightly larger in volume, although its less compact design gives it considerably greater length than the smaller vessel. The major change between the two is the lack of a mission specific pod on the Galaxy class, the increased volume allowing sections within the hull to be mission customized. This combined with a more advanced systems level to allow all functions to be performed by the single design. In addition the saucer and engineering hulls are separated by an eleven deck connecting neck section. This separation between the two hulls allows the nacelles to be located outboard and above the engineering hull, a position which increases the efficiency of the warp drive field slightly. This gives the Galaxy class warp coils an efficiency of 88% at speeds of up to Warp 7 and 52% through Warp 9.1 - the comparable figures for the Nebula class are 84% and 47% respectively.
 
 

Saucer Section features:
Deck    Contains...   
1    Main bridge, main observation lounge, captains ready room.   
2    Junior officers quarters   
3    Junior officers quarters   
4    Main shuttle bay, cargo bays   
5    Science laboratories, residential quarters   
6    Transporter room 1, 2, 3, 4, science laboratories, main dorsal saucer phaser array   
7    Residential quarters   
8    Residential quarters, including captains quarters   
9    Residential quarters, Saucer impulse engines, secondary dorsal saucer phaser arrays   
10    Ten forward, computer cores, escape pods   
11    Holodecks, residential quarters   
12    Sickbay, medical laboratories, gymnasium   
13    Residential quarters, life support system, main ventral saucer phaser array   
14    Residential quarters   
15    Maintenance centre   
16    Captains yacht docking port   

Stardrive Section features:
Deck Contains:       
Deck 8- Battle bridge   
Deck 26- Engineering support   
Deck 9- Docking latches and supporting mechanisms   
Deck 27- Deuterium fuel pumps and fill ports   
Deck 10- Emergency batteries, phaser bank systems   
Deck 28- Deuterium fuel storage   
Deck 11- Life support systems   
Deck 29- Deuterium fuel storage   
Deck 12- Science labs   
Deck 30- Deuterium injection reactors   
Deck 13- Shuttle bays 2 and 3  
Deck 31- Science laboratories   
Deck 14- Shuttle bay support, personnel transporters 5 and 6  
Deck 32- Living quarters   
Deck 15- Science labs   
Deck 33- Living quarters   
Deck 16- Maintenance   
Deck 34- Environmental support   
Deck 17- Living quarters   
Deck 35- Aft photon torpedo launcher   
Deck 18- Living quarters   
Deck 36- Main engineering, secondary ventral stardrive section phaser arrays   
Deck 19- Living quarters  
Deck 37- Environmental support, waste management   
Deck 20- Living quarters   
Deck 38- Cargo bays, brig   
Deck 21- Power distribution   
Deck 39- Cargo bays   
Deck 22- Engineering support laboratories   
Deck 40- Antimatter injection reactors   
Deck 23- Main impulse engines   
Deck 41- Antimatter storage pods   
Deck 24- Life support   
Deck 42- Antimatter storage pods   
Deck 25- Dorsal docking port, forward photon torpedo launcher           

Addition Notes: The increased internal volume allowed for 800,000 square metres of mission adaptable facilities. This allows the Galaxy class to support a wide range of ongoing research projects independently of the vessels primary mission. Although not a new idea in Starfleet vessels, the Galaxy class is unique in the extent to which this is possible. These ships are capable of supporting up to 5,000 mission specialists, while the decentralized nature of the secondary power grids allows laboratories to function effectively even during combat operations. The combat capability of the Galaxy class was also significantly greater than that of the Nebulas. The three burst fire torpedo tubes are each capable of launching ten photon torpedoes every six seconds, while there are no less than twelve Type X phaser arrays. As with many recent Federation designs, the use of long phaser arrays rather than banks gives the main phasers of the Galaxy class a great capability for sustained firing and rapid recharge/cool down time. The Galaxy class is the first on which all segments of every phaser array are supplied by a separate power system; although this increases the complexity of the system tremendously, it gives the phaser arrays a tremendous survivability in the face of combat damage. In service the Galaxy class at first proved exemplary, but by 2371 no less than three of the initial six ships had been lost, one with her entire complement of crew and families. This alarming record led to many changes being introduced during refits of the remaining three vessels, and also to the construction of six new Galaxy class ships from space frames held in reserve against future need. The unfortunate history of the Galaxy class vessels combined with the recent escalation's in tensions within the alpha quadrant has led to all six vessels being subsequently completed, and all are now on active service against the Dominion. Major changes to the Galaxy class have included a new more powerful warp core, a redesigned shield system intended to perform far better against phased polaron beam weapons, various changes to the ships computer systems, plus many minor changes to the ships systems. There are currently nine galaxy class vessels in service. Production of these vessels continues today; five Galaxy class ships took part in the recent operation to retake Deep Space Nine from the Dominion and the class has gained a fearsome reputation during the war, so far operating without loss. Though new Galaxy class ships are being produced without any science or diplomatic facilities included in order to reduce the vessel mass and so enhance combat performance during the Dominion war. These ships will be "filled out" after the war, considerably enhancing Starfleets exploration capacity. At this point further production is expected to be terminated in favour of the new Sovereign class.
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