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| - During the 2250s, the USS Shenzhou was installed with an early version of this type of device for use on the bridge and in private. This device was prone to glitches. (DIS: "The Vulcan Hello", "Battle at the Binary Stars") In the same era, the technology was also in use by the Klingons. Their version of the device produced monochrome images when used between Klingon ships, but more color when communicating with a Starfleet one. (DIS: "Battle at the Binary Stars") After this era, the device appears to have fallen out of use for a long period of time. The holo-communicator doesn't feature in Star Trek: The Original Series, Star Trek: The Animated Series, or Star Trek: The Next Generation, and in Star Trek: Deep Space Nine it was presented as a new device that captains were still getting used to. However, other types of holographic devices, similarly imperfect, were seen during the 23rd century. They were later included on the bridges of ships such as the USS Defiant and USS Malinche; Captains Sisko and Sanders used theirs for the first time to coordinate an attempt to capture Maquis leader Michael Eddington. The Maquis had been able to "procure" a holo-communicator of their own, allowing Eddington to use it to contact Sisko during the hunt. As the communicator was installed after a cascade virus that damaged all other systems on the Defiant, it continued to work throughout Sisko's pursuit of Eddington. A holo-communicator was also installed in Captain Sisko's office on Deep Space 9 at this time, and was used by Odo to communicate with Sisko aboard the Defiant. (DS9: "For the Uniform") The holo-communicator in Captain Sisko's office was later used to allow him to converse with Rear Admiral Bennett on the matter of Doctor Julian Bashir's genetic engineering. (DS9: "Doctor Bashir, I Presume") Kurros of the Think Tank used a similar technology, which created an isomorphic projection of himself aboard the vessels of potential clients. The projection was sophisticated enough to taste beverages. (VOY: "Think Tank") Shinzon used a holo-communicator to demand Jean-Luc Picard's surrender in 2379. His device was more advanced, however, as it was able to be projected into an area without holo-emitters and it was impossible to trace the signal back to the Scimitar. (Star Trek Nemesis)
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