Cardassian ATR - 4107 The Cardassian ATR - 4107 was a type of advanced Cardassian weapon of mass destruction designed in 2369 . ( ) Specifications . Although officially referred to as a missile , the ATR - 4107 could also be considered a completely autonomous warship in its own right . It was a warp - capable vessel , capable of reaching speeds up to at least warp 9 , and carried 1 , 000 kilograms of matter and 1 , 000 kilograms of antimatter – enough to destroy a small moon . The missile also carried a large cache of conventional weaponry , including disruptor s , quantum torpedo es , a thoron shock emitter and a plasma wave . It had its own shields as well . On board was a sophisticated computer system that could predict and counter hostile actions by individuals and ships . It used its sensors to detect lifeforms on other ships , evaluate defensive and offensive capabilities , and recognize other ships . It had life support and an operational space for a maintenance crew with several consoles . It also had DNA scanners in order to verify the identities of persons inside . The computer system responded to voice commands . ( ) History . In 2369 ( around stardate 46437 . 5 ) , the Cardassians designed one of these missiles and deployed it in late 2370 to destroy a Maquis munitions base on the Planetoid Alpha 441 in the Demilitarized Zone . Although the Maquis threw every weapon available at the missile , it proved unstoppable due to the combined benefits of its strong defenses and its advanced computer . The missile failed to detonate upon reaching its target – the Cardassians had used an old - fashioned kinetic detonator in the design , which malfunctioned , and the missile simply drifted into orbit around the planetoid instead of destroying it . There , Maquis member B ' Elanna Torres managed to board the weapon , and spent nearly a month reprogramming its computer and upgrading its systems , and eventually nicknamed it Dreadnought . She completely reprogrammed the computer to work for the Maquis , and changed its vocal subroutines so that the computer sounded like her , as she claimed that she had gotten sick of listening to the " ugly " male Cardassian computer voice . Once she was completed with refitting and upgrading " Dreadnought " , she sent it , without authorization from Chakotay , her commander , to attack the Cardassian fuel station on Aschelan V . The missile ' s evasive attack route took it through the Badlands , where it inexplicably disappeared . It was assumed that the missile was destroyed in a plasma storm . It was not realized until nearly two years later that " Dreadnought " had been abducted by the and whisked away to the Delta Quadrant by the advanced entity . The missile drifted on a rough course back towards the Alpha Quadrant , but it had suffered some damage to its computer and sensor systems that altered the way it perceived potential targets . It attacked and destroyed an unarmed transport before locking on to the nearby planet of Rakosa V , an inhabited world , which its sensors had confused with its original target . Fortunately , the was nearby , having also been abducted by the Caretaker the year before , and B ' Elanna Torres was on board . She used her familiarity with the missile ' s systems to board the weapon and instruct it to deactivate . Torres then returned to " Voyager " , and the crew made plans to dismantle the weapon and salvage its parts . " Dreadnought " s computer had other plans , though . Back in the Alpha Quadrant , Torres had programmed the computer with 39 different possible security breaches , including the possibility that Torres herself was coerced into cooperating with either the Cardassians or the Federation and attempting to stop the missile from attacking its target . The computer accused Torres of collaborating with the Cardassians . As the missile approached Rakosa V , it was confronted by a small fleet of fifteen defensive fighters ; even with the Rakosans receiving support from " Voyager " , they were vastly outgunned and quickly forced to withdraw . Torres used the diversion to activate the latent Cardassian computer programming , which attempted to retake control of the missile . Torres ' Maquis program initiated countermeasures , attempting to wipe out the attacking " virus " . Torres then took the opportunity to work her way into the missile ' s warp core , where she used her phaser to burn her way through the reactor core ' s shielding . As Torres was attempting to destroy the magnesium casing on the warp core , Captain Janeway ordered her crew to abandon " Voyager " and prepared to activate the ship ' s auto - destruct sequence , ready to sacrifice her ship and herself to save the planet . Torres succeeded in destabilizing the core , and Janeway canceled the sequence just a minute before the explosion . Torres herself was beamed out at the last second , as the missile exploded in orbit of Rakosa . ( ) Appendices . Background information . In the final draft script of " Dreadnought " , the exterior of the " Dreadnought " missile was described thus ; " " It ' s a sleek , somehow sinister - looking missile , with large engines , and covered with all manner of weaponry . " " The " Dreadnought " missile studio model was designed by Rick Sternbach . ( ) The missile ' s voice was provided by B ' Elanna Torres actress Roxann Dawson . The " Dreadnought " script stated , " " The computer speaks in Torres ' voice , with a slightly mechanized tone , and no emotional inflection whatsoever . " " The missile interior was designed by Richard James . An extreme number of fluorescent lights were built into the set , so that Director LeVar Burton could film there with a hand - held Steadicam without being encumbered by equipment in the way , allowing the production crew to film more quickly on the set . ( ) Apocrypha . In " " , the " Dreadnought " missile appeared as a Cardassian weapon . Upon impact with its target , it created a spatial rift that destroyed any ship or station within its radius . If destroyed by enemy fire , however , it would explode normally with no damage to nearby structures . In " Star Trek Online " , the " Dreadnought " is mentioned by name in the information revealed with the completion of the Temporal reputation line . It ' s revealed that Na ' kuhl agents beamed aboard the weapon and attempted to sabotage it in order to attack " Voyager " , but was stopped by Temporal Agents , despite the weapon itself attacking the agent due to being a Cardassian . It ' s suggested that this is why the weapon went out of control .