 | Saucer separation |  |
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Disconnection of engineering hull and main hull (saucer) of a starship. Saucer separation is employed in emergency situations, e.g. in order not to endanger civilians in a battle or in case a warp core breach breach is inevitable.
In Galaxy-Class starships, separating the saucer section is inadvisable at any warp speed. It is possible, but there is absolutely no margin for error. (TNG: Encounter at Farpoint)
Contributed by: Webteam |
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| second auxiliary tank | |
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When repairing the Shuttlecraft Galileo, Spock suggested channeling the second auxiliary tank through the primary intake valve, but Scotty said it was too delicate. (TOS: The Galileo Seven)
Contributed by: Clare Bradley |
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| Secondary phase modulator | |
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Miles O'Brien believed the secondary phase modulator was causing a high-pitched noise in the science lab on Deep Space Nine. He was correct. (DS9: Babel)
Contributed by: Clare Bradley |
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| Security access code | |
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Password used by Starfleet personnel to provide positive identification when requesting restricted computer functions or information. Both the password and the user's voiceprint are used to cofirm the user's identity. Security access codes are changed occasionally.
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| Self-sealing stem bolt | |
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Self-sealing stem bolts can be used in the production of reverse-ratcheting routing planers.
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| Sensor | |
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A collective name for a variety of devices for gathering data about electromagnetic radiation and particles and for chemical, biological and medical analysis.
External sensors are attached to the outer hull of a starship. Among them are navigational sensors which determine the ship's position and velocity and scientific sensors for astronomical observation, planetary surface analysis and remote lifeform analysis. Internal sensors are used to control life support and detect hazardous environmental conditions as well as to track potential intruders.
Finally, sensors are also included in tricorders and other hand-held devices which can perform similar tasks, however, their range is limited.
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| Shield harmonics | |
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The interaction of different frequencies of force-fiels energy present in a defelctor shield. Shield harmonics vary with the modulation, geometry, frequency and nutation of the shields. This set of data can be used like a fingerprint to identify ships by type, class and origin.
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| Shield inverters | |
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A subsytem of Federation starship defensive shield arrays.
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| Shield nutation | |
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Engineering term measuring variations in shield-frequency phase rotation.
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| Shuttlebay | |
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Facility on a starship where shuttlecrafts can land, be stored and maintained. The space door is usually closed, and is replaced by a forcefield when a shuttle is about to land or to be launched. This forcefield can be penetrated by the shuttlecraft itself, while it prevents decompression of the shuttlebay. Each shuttlebay is equipped with a tractor beam generator in order to facilitate the landing procedure.
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| Shuttlecraft | |
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Small space vessel for short-range transport with a typical capacity ranging from 2 to 10 persons. Shuttlecrafts are equipped with impulse drive, some types also with warp drive.
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| Sickbay | |
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Medical facility aboard a starship or space station.
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| SIF (Acronym for Structural Integrity Field) | |
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A system of forcefields built up around and within a starship in order to counterbalance acceleration forces and gravitational forces. The SIF actually keeps the spaceframe in one piece.
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| Site-to-site transport | |
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Also known as direct transport, the process whereby a transport subject is first beamed to the transporter room from a remote location. However, instead of being materialized in the chamber, the subject is then transported directly to another location where it is materialized.
Site-to-site transport is relatively costly in terms of energy usage, so it is primarily used for emergency situations.
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| Slingshot effect | |
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Time travel that occurs if a starship approaches a star at high warp and then turns round again.
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| Soliton wave | |
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A method of warp travel without shipboard warp drive. The soliton wave is generated by a stationary generator on a planet and directed towards the ship in order to accelerate it to warp speed. A second wave generator at the destination is required to dissolve the wave generating a counterwave with matching frequency, phase and amplitude. The concept of the soliton wave seems to be quite similar to conventional warp propulsion, considering that a wave is nothing but a traveling field.
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| Sonic driver | |
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 An engineering tool. (TNG: The Naked Now)
Contributed by: Clare Bradley |
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| Spaceframe | |
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Skeletal structure of a starship. The spaceframe of a large vessel is usually designed to provide sufficient mechanical stability while the ship is at rest in orbit or open space. Stability during acceleration by propulsion systems or gravity can only be accomplished through the SIF.
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| spatial compression index | |
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Warp output must be within 300-312 millicochranes to prevent fusion of the dilithium matrix unless the spatial compression index is greater than 5.62% or the ship is within two parsecs of a Class-C gravimetric field distortion. (ENT: Doctor's Orders)
Contributed by: Clare Bradley |
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| Spectral micrometer | |
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A tool which could be used to determine if an amethyst was fake or not. (ENT: These are the Voyages)
Contributed by: Rob Versteegt
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| Starbase | |
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Extensive Starfleet facility which serves for maintaining and resupplying starships, for recreation and exchange of ship crews, for research, for medical supply, as a military base, as a place for interstellar trade and for administration. Starbases are either partially located on a planet surface, or they are realized in form of huge space stations.
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| Starboard | |
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Ancient nautical term referring to the right side of a ship, as opposed to the port (left) side.
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| Starboard impulse packs | |
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 Gary Mitchell told Lee Kelso that the points on the starboard impulse packs had about decayed to lead. (TOS: Where No One Has Gone Before)
Contributed by: Clare Bradley |
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| Stardrive | |
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 The Stardrive is the section of Galaxy-class starships that contains the warp engines. This is the section that the Saucer section separates from. (TNG: Encounter at Farpoint)
Contributed by: Clare Bradley |
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| Starfleet Engineering Corps | |
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In an alternate timeline, Harry Kim was a Starship Design Specialist with the Starfleet Engineering Corps. (VOY: Non Sequitur)
Contributed by: Clare Bradley |
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| Starship | |
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Designation for a large type of space vessel with warp drive. A starship typically consists of more than one deck and has separate departments such as the bridge, engineering or sickbay.
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| Static warp shell | |
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A symmetrical subspace bubble, often toroidal or spherical in three-dimensional profile. A static warp shell cannot be used for warp-propulsion applications because warp drive requires an asymmetrical warp field.
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| Stratospheric torpedoes | |
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Starship-launched weapon designed to exlode in a planet's atmosphere.
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| Structural breach | |
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Break or hole in the hull of a starship.
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| Sub-quantum Teleportation | |
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In 2154, Emory Erickson came aboard the Enterprise NX-01 for a test of sub-quantum teleportation. It was a ruse. He was actually trying to find his son. Theoretically, there's no limit to the distance for sub-quantum teleportation. The Vulcan Science Academy had been studying sub-quantum teleportation for some time with little result. The sub-quantum version should use less energy than a regular transporter. The sub-quantum transporter is a fundamentally flawed concept, and will never work, according to Emory Erickson. (ENT: Daedalus)
Contributed by: Clare Bradley |
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| Sublight | |
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Scientific term describing space-normal speeds, slower dan c, the speed of light. Sublight speeds do not require warp drive, and are generally achieved using impulse power. As a result, sublight travel is subject to relativistic effects such as time dilation and Fitzgerald-Lorentz contraction.
Sometimes referred to as space-normal travel.
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| Submicron matrix transfer technology | |
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Technique for replicating existing neural net pathways in a positronic brain into another positronic brain. This technology was introduced at a cybernetics conference in 2366.
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| submolecular scan | |
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Gralik ran a submolecular scan on the kemocite he refined for Degra. (ENT: The Shipment)
Contributed by: Clare Bradley |
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| subquantum imprint | |
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An analysis of the subquantum imprint of the kemocite used in the Xindi weapon demonstrated that Gralik's kemocite facility was the source of the kemocite. (ENT: The Shipment)
Contributed by: Clare Bradley |
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| Subsonic transmitter | |
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 Kirk and Spock rigged a subsonic transmitter to irritate the crew on the surface of Omicron Ceti III, until they got angry, and the spores lost their effect on them. (TOS: This Side of Paradise)
Contributed by: Clare Bradley |
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| Subspace | |
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A domain outside the normal three-dimensional space, rather than another dimension. Effects of mass/energy transition to subspace allow apparent FTL velocities and are used by the warp drive, computer system and subspace radio.
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| Subspace bypass circuit | |
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 Uhura was going to rig this up to restore communications with the landing party on Stardate 3486.1 when Apollo was preventing communications. It's very delicate work. If it's not done just right, the entire communications system could blow. (TOS: Who Mourns for Adonais?)
Contributed by: Clare Bradley |
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| Subspace field | |
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Special type of forcefield that extends into subspace and is able to change its structure or geometry. A subspace field facilitates propulsion and signal transfer. The subspace field strength is measured in cochrane untis. Above a subspace field stress of 1 cochrane, the subspace field becomes a so-called warp field, allowing FTL travel of starships and signals.
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| Subspace inversion | |
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Spectacular phenomenon in which subspace near a wormhole becomes fragmented. The Bajoran wormhole undergoes a subspace inversion every 50 years.
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| Subspace radio | |
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Form of ship-to-ship or interplanetary communication that takes advantage of subspace physics and allows faster-than-light (FTL) signal transmission. The maximum possible velocity of signal propagation is Warp 9.9997, which is significantly faster than any starship. A network of subspace relays within the Federation territory ensures that no inadmissable signal decay occurs in case of long distance communication.
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| Subspace transporter | |
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A transporter type that transfers patterns through the subspace domain. Although their operation range may cover many lightyears and they are able to penetrate shields, subspace transporters are not reliable and therefore not employed by the Federation.
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| Subspace weapon | |
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Weapon whose destructive force is based on the disruption of subspace. Subspace weapons are outlawed by the Federation because of their irreparable damage to subspace.
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| Synchronic meter | |
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Scotty had Technician Wilson get this device to make sure the transporter was working properly. (TOS: The Enemy Within)
Contributed by: Clare Bradley |
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