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| [[Deflector Shields]] or screens - generally referred to simply as shields - are a type of force field that surrounds a starship, space station, or planet to protect against enemy attack or natural hazard. | | [[Deflector Shields]] or screens - generally referred to simply as shields - are a type of force field that surrounds a starship, space station, or planet to protect against enemy attack or natural hazard. |
| [[Image:Sovereign class deflector shields.jpg|thumb|500px|right|Sovereign Class Shield display]] | | [[Image:Sovereign class deflector shields.jpg|thumb|200px|center|Sovereign Class Shield display]] |
| ==Operation and Use== | | ==Operation and Use== |
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| ==Shield types== | | ==Shield types== |
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| ===Covariant Shield===
| | *Covariant Shield |
| A covariant shield is a type of deflector shield based on tetryons, used on the Norcadian starship where Tsunkatse matches are held. (VOY: "Tsunkatse")
| | *Defense Field |
| | *Immersive Shielding |
| | *Metaphasic Shield |
| | *Multi-adaptive Shield |
| | *Multi-spatial Force Field |
| | *Multiphasic Shield |
| | *Paratrinic Shield |
| | *Regenerative Shield |
| | *Temporal Shield |
| | *Unimatrix Shield |
| | *Structural Integrity Shield |
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| ===Defense Field===
| | [[Category Engineering]] |
| Defense fields were a type of shielding that was employed by late 23rd century Federation starships. They were raised during yellow alerts, and protected the bridge area of the ship. (Star Trek II: The Wrath of Khan)
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| ===Immersive Shielding===
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| Immersion shielding is a deflector shield configuration designed for a fluid environment, such as air or water.
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| :It was first used by Tom Paris, Seven of Nine, Harry Kim, and B'Elanna Torres during the first flight of the Delta Flyer in 2375, into the atmosphere of a gas giant to retrieve a multispatial probe. (VOY: "Extreme Risk")
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| :Later that year, immersion shielding allowed the Delta Flyer to explore the Monean Waters. In conjunction with structural integrity field, the Delta Flyer could survive pressures at depths of 600 kilometers. (VOY: "Thirty Days")
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| ===Metaphasic Shield===
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| Metaphasic shielding is a technology invented by Dr. Reyga, a Ferengi scientist, in 2369. It is capable of withstanding the pressure, radiation and energy of a star's corona. The technology was installed on the shuttlecraft Justman, but Reyga was murdered by Takaran scientist Jo'Bril shortly before the shields were proven. Subsequently, Dr. Beverly Crusher successfully demonstrated the shield's effectiveness by piloting the Justman into the corona of the star Veytan. (TNG: "Suspicions")
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| :Lieutenant Commander Geordi La Forge developed the technology further for use on the USS Enterprise-D in 2370. These modifications allowed the Enterprise-D to lure a Rogue Borg ship into a star's corona and destroy it with a solar flare. (TNG: "Descent, Part II")
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| :The Mokra prison facility in the Delta Quadrant was protected by metaphasic shields. (VOY: "Resistance")
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| ===Multi-adaptive Shield===
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| Multi-adaptive shielding was developed by Erin and Magnus Hansen for use on the USS Raven (NAR-32450) during their three year mission studying the Borg. It is a form of shielding designed to hide a vessel from Borg sensors.
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| :In 2375, the technology was incorporated into the systems of the Delta Flyer when the shuttle was used in a mission to rescue Seven of Nine after her capture by the Borg. However, as the Borg had assimilated Magnus Hansen, they were able to adapt and still detect the Delta Flyer. However, upon engagement with the Borg, the Delta Flyer was able to keep changing the shielding before the Borg could adapt, until the Borg managed to grab them with a blind tractor beam shot. (VOY: "Dark Frontier")
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| ===Multi-spatial Force Field===
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| A multi-spatial force field is a type of advanced force field.
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| :When The Doctor's mobile emitter and DNA from Ensign Mulcahey was assimilated by Seven's nanoprobes in 2375 following a transporter accident, One, a drone possessing 29th century technology was the result. Among the many advanced capabilities One possessed was a personal multi-spatial force field.
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| :During a Borg attack on USS Voyager, One boarded the attacking Borg sphere, interfaced with the ship's navigation controls and steered the ship into a nearby stellar phenomena, destroying the ship. One escaped destruction himself aided by his personal multi-spatial force field. (VOY: "Drone")
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| ===Multiphasic Shield===
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| Multiphasic shielding is a type of deflector shield, capable of withstanding close proximity to a star, much like metaphasic shielding.
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| :Alice was equipped with multiphasic shielding. (VOY: "Alice")
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| :DaiMon Nunk fantasized about buying a ship with multiphasic shielding and a gold-pressed latinum hull after selling Seven of Nine's nanoprobes. (VOY: "Inside Man")
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| :The Omega Directive mandates multiphasic shielding be installed around the warp cores of any responding ships. (VOY: "The Omega Directive")
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| ===[[Paratrinic Shield]]===
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| Paratrinic shielding is a type of advanced deflector shield technology. The shield creates a warpign field of space time which effectively transports any energy or matter with an atomic mass away from the field at a random angle from it's approach. This type of shiled is extremely power-hungry and requires a great deal of power to function. For this reason it can not be installed on a starship.
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| However in 2408, the crew of the [[ISS Rosenante]] stole a protoype Paratrinic Shield from a [[Bynars|Bynar]] research facility and using a stabilized [[Omega Molecule]] to power it, used it to protect the [[Omega Device]]. The crew of the [[USS Furious]] managed to bypass the shields computer system and shut down the shield, allowing them to destroy the device before it could be detonated.
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| :The Druoda series 5 long-range tactical armor unit was equipped with paratrinic shielding. (VOY: "Warhead")
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| ===Regenerative Shield ===
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| Regenerative shields were an advanced shield system used by the Borg and other species.
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| :The basic principle of regenerative shielding was to quickly analyze an attacking weapon's frequency and then modulate shield freqency to increase damage mitigation without depleting shield energy.
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| :Regenerative shields were used on Borg vessels and Borg drones. When in combat, Borg drones could be killed by phasers but only for the first several shots. The phaser became ineffective if used at the same setting after multiple shots. The phaser's effectiveness could be extended though by adding a frequency modulation chip. (TNG: "Q Who", "The Best of Both Worlds", "The Best of Both Worlds, Part II") However, Borg drone shields appeared to be less resilient to projectile weapons; when the Borg attempted to assimilate the USS Enterprise-E in 2063, Jean-Luc Picard lured two drones into the holodeck and used a holographic Thompson submachine gun to kill the two drones. (Star Trek: First Contact)
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| :Starships from other races equipped with this type of shielding included sensors integrated within the shield systems' own energy that alters the frequency to better protect the ship.
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| :The battle systems of Starfleet's Prometheus-class starships included regenerative shielding, ablative armor, and multi-vector assault mode. (VOY: "Message in a Bottle")
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| :The warships of the Numiri were protected by regenerative shields. (VOY: "Ex Post Facto")
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| ===Temporal Shield===
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| Temporal shields are a theoretical technology that protects against weapons utilizing aspects of temporal science. Temporal shields also protect a vessel against changes in the timeline.
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| :In an alternate timeline, temporal shielding was designed by the crew of the USS Voyager in 2374. In this timeline, Voyager came under attack by the Krenim, whose chroniton torpedoes were able to pass right through the starship's shields. It was discovered that these torpedoes were in a state of temporal flux, and thus their shields were useless.
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| :Lieutenant Commander Tuvok and Seven of Nine worked on a way to modify the shields, eventually succeeding after they determined the temporal variance of the torpedoes by scanning an undetonated warhead lodged in a Jefferies tube. They changed the shield frequency to match it, and set the deflector to the inverse of the pulse. These modifications were proven effective in a later Krenim attack.
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| :However, Voyager's temporal shields had the additional effect of producing a level-9 temporal disruption, throwing off the timeline calculations being made aboard the Krenim weapon ship nearby. As a result, Annorax accidentally reverted the Krenim Imperium to a pre-warp state. He subsequently attempted to erase Voyager from history, but Voyager escaped.
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| :Voyager later provided temporal shield technology to the Nihydron and the Mawasi, their allies in a joint attack on the weapon ship. Although their temporal shields protected them against changes in the timeline, they proved ineffective against a direct hit by the temporal weapon and two Nihydron warships were erased. The temporal shields around the fleet were ultimately taken offline, so that when the temporal weapon ship erased itself from history as a result of Voyager's kamikaze run, everything would be restored to its original state. (VOY: "Year of Hell", "Year of Hell, Part II")
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| ===Unimatrix Shield===
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| The unimatrix shield is a type of shielding developed by Lieutenant Tuvok of the USS Voyager in 2375, capable of withstanding extremes of temperature and pressure. It was first tested on the multispatial probe, and later implemented on the Delta Flyer. (VOY: "Extreme Risk")
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| [[Category: Engineering]] | |