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Tactical/Propulsion and computer systems
 
CLOACKING DEVICE 
Type : Romulan (from a  D'Deridex Class Warbird) 
          (specific model unknown) 
Number : 1 
Range :  The cloaking field envelops the hull of the ship itself 
             to minimize subspace distortion. During warp flight, 
             the cloak is extended to mask the warp field. 
  Output :
When active, all defensive system power is transferred to the cloak,
which gives it enough power to fully cloak the strong signature that Defiant puts out.
The total amount of power used is classified, but goes into the gigawatt range.
The cloak masks all energy put out by Defiant, making it virtually invisible to everything,
except the most powerful subspace scanner 

Note :
The Treaty of Algeron bans all Starfleet vessels from having and using cloaking technology.
However, Defiant was given permission to use the cloacking device, in exchange for whatever
information Starfleet security had on the Dominion, Since the Romulans broke this
agreement by attacking DS9, this agreement no longer exists.
(Starfleet vessels are expressly forbidden to use a cloacking device in the Alpha Quadrant)

TACTICAL SYSTEMS:
2 emitters on starboard nacelle, facing forward, 180 degree vertical coverage.
2 emitters on port nacelle, facing forward, 180 degree vertical coverage.
2 emitters, dorsal midships, 180 degree vertical coverage and 360 degree horizontal coverage.
2 emitters, ventral midships, 180 degree vertical coverage and 360 degree horizontal coverage.
2 emitters, dorsal aft, 180 degree vertical coverage.
2 emitters, ventral aft, 180 degree vertical coverage.

COMPUTER SYSTEMS
Type :
The two main computer cores incorporate a new technology, Reflex Quintronics.
It is a combination of Duotronic Drivers, Isolinear Chips, Bio-Neural gel packs,
and the incorporation of a breakthrough in Cytherian technology.
This gives the computer and optical data network a sort of bio-will,
which allows it to respond to external stimulae on an instinctive level,
according to its programming. If the ship is damaged,
the computer automatically senses it through the ODN network (like a nervous system)
and immediately sends commands to the appropriate systems to repair it,
while at the same time notifying the bridge.
However, the computer's actions can be directed by the crew, but when the computer is fully automated,
it treats the ship almost as a living organism and the crew as the brain.
Reflex Quintronics does NOT give the computer the ability to make independent decisions;
the computer consults with its programming and the options placed inside it, weighs all alternatives,
and chooses the best course of action, while notifying the bridge of what it's doing.
The computer can be overridden by the crew at any time.

Number : 2 (both occupy space far astern on each side of the ship)
Memory Capacity :
The two cores are identical in every way;
micronization and Cytherian advances have made these computers super-powerful.
Total memory capacity for one core is 4,620,890,000 kiloquads,
which is three times more memory than an isolinear computer core on a Galaxy class starship.
Total memory of both cores put together is 9,241,780,000 kiloquads.

Transmission Speed :
FTL elements in the cores allow for transmission of data at unprecedented speeds, and since Reflex
Quintronics works as instinct, the ship literally transmits with the speed of thought.
Standard cruise mode transmission rate is approximately 423 billion times the speed of light,
which is about 63,000 kiloquads/sec.
Alert situations have the computer  working harder and faster,
and the fastest transmission rate recorded is approximately 645 trillion times the speed of light,
or 728,000 kiloquads/sec. Needless to say,
PADDs and special consoles have been constructed to take as much advantage of
this undreamt-of power as possible.

WARP PROPULSION SYSTEMS
Drive Type : Prototype Micronized Warp Core
note:
Defiant is the first starship to use a warp engine for FTL travel without dilithium crystals.
A new substance was found in the Gamma Quadrant recently ago,
a crystal which was non- reactive to antimatter when subjected to megawatt-level
high frequency electromagnetic fields, making it "porous" to antihydrogen, which is what dilithium does.
However, new elements in the matrix formula of the crystal seem to amplify the reaction of deuterium
and antihydrogen when they interact on the crystal.
This creates substantially more power and stronger warp fields.
The element has been officially named "Keltrinium", after the Trill scientist who discovered it.
This crystal cannot be synthetically produced; it must be mined on the planets where it is found,
refined into a warp crystal, and installed into a starship's M/ARA (Matter/Antimatter Reaction Assembly).
This has allowed the basic warp core design to be micronized,
and less fuel can be stowed on Defiant because it is now more potent.
Also, it has been found that this element seems to affect the plasma used to generate the warp fields,
causing them to not "pollute" the space-time continuum.

Special Note :
Incredibly high warp speeds (in excess of warp 9.95) bring the Tau factor into effect, which is "time dilation".
The faster you go, the more subjective time slows down.
And although Newtonian physics do not apply to subspace, they do apply to the fields that generate subspace.
Therefore, one second of stress on a warp field becomes an eternity of stress at warp 9.95+
because time slows down, but the stress remains the same.
Therefore, delta isotopes are injected into the M/ARA to mix with the warp plasma.
Delta isotopes are dangerous to humans,
but have been observed to have an effect on the temporal stability of this dimension.
The isotopes are modulated to compensate for the amount of time Defiant loses at high warp,
thereby "pulling" the ship forward in time to keep up with the present. 

IMPULSE SYSTEMS
Drive Type : Standard Defiant Class mass drivers, fusion engines comparable to Nebula class
Number : 2
Output :
Each engine can propel the Defiant at speeds just under .75c, or "three-quarters impulse".
Full impulse is .993c (one tenth away from 186,282 miles per second, which is warp one),
and requires both engines working at approximately half strength.
Standard impulse operations are limited to .25c, with each engine working at .125c.

RCS THRUSTER QUADS
Arrangement :    3 on port warp nacelle,1 dorsal,1 ventral,1 lateral
                           3 on starboard warp nacelle,1 dorsal,1 ventral,1 lateral
                           2 at port dorsal
                           2 at starboard dorsal
                           4 along the rim of the hull, on the bow
                           2 at ventral midships
                           6 along the rim of the hull, far astern
Type : Standard Defiant Class magnetohydrodynamic gas-fusion thruster
Output : Each thruster quad can produce 6.3 million Newtons of exhaust

DEFLECTOR SYSTEM
Type :
The Defiant's shield system is unique in Starfleet.
It is multi-layered, which means it is composed of several static shield layers nested closely together
(similar to asymmetrical peristaltic field manipulation, or warp fields),
five meters out around the entire hull of Defiant.
The outermost shield layer is classified, except for one fact which can be disclosed:
it manipulates graviton polarity in a way not typical to shields.
The middle layer incorporates automatic rotation of frequency and nutation, which absorbs enemy fire,
spreads it out along the shield, and redirects it into space.
This shield sends data on what type of weapon is used on it, and what frequency and phase the weapon uses.
Once this is analyzed by the tactical officer,
the shield can be configured to have the same frequency as the incoming weapon, but different nutation,
which dramatically increases shield efficiency.
The innermost shield layer is still being tested, and is highly classified,
but what can be disclosed is that it is a multi-phase holographic shield,
which is designed to not only be considerably more protective across a wider range of the EM spectrum,
but also take the energy from incoming enemy fire and use it to generate a fake holographic sensor "ghost",
which would confuse enemy sensors.

Range :
The shields, when raised, stay extremely close to the hull to conserve energy.
The innermost shield is five meters away from the hull,
and each consecutive layer is three meters further out.

Output :
Each shield layer takes its power directly from the warp engines and the impulse fusion generators,
and is augmented by the energy from enemy fire.
There are sixteen shield grids on Defiant, and during Alert situations, each shield generates 3219 MW,
resulting in nearly 10,000 MW of shield power.
Because of this, some shield energy is usually siphoned off to the phasers,
but the total output of all three shields added together will never dip below 4,500 MW.
The shields can protect against approximately 35% of the total EM spectrum -
(whereas a Galaxy class starship's shields can only protect against about 23%),
made possible by the multiphase technology incorporated into the shields.

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