Star Trek Expanded Universe
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The Epsilon Monitoring Stations were a series of observation and communications relay stations built along the coreward Federation/Klingon border. At least nine of these were in service by the 2270s. (Star Trek: The Motion Picture) A total of 11 would be in service a century later. (There were also 11 Delta Monitoring Stations along the antispinward Federation/Klingon border.) (Star Trek Star Charts)

In Orion Press continuity, the Epsilon stations weren't limited to the Federation/Klingon border but surrounded a 100-light-year radius of the center of the Federation. There were 12 in service by 2286 and 24 by 2295. (Orion Press: Klingons!, "The Cost of Freedom", Insanity's Child)

Epsilon 1 was the station nearest to the Romulan Neutral Zone. (Orion Press: "The Price of Peace")

Janice Rand was assigned to Epsilon 2 after the Serenidad crisis in the 2270s. (Orion Press: Chekov's Enterprise)

Epsilon 3 and Epsilon 4 are two stations nearest to the Organian Treaty Zone. In 2275, both were destroyed by the Klingon ship Korvus. (Orion Press: The Daystrom Project)

In April, 2288, Epsilon 3 advised USS Avenger of a group of Klingon vessels paralleling Avenger's patrol group, but on the Klingon side of the border. (Star Trek: Avenger: "Border Skirmish")

Commander Kevin Seal commanded Epsilon 8 from 2269 to 2278. Cartographic Probe 712 reported to this station when it contacted an inhabited world in 2273. {Orion Press: "The South of Death", Klingons!)

Epsilon 9, and its officers and crew, was destroyed by V'Ger while the latter was en route to Earth. (Star Trek: The Motion Picture)

Epsilon 12 was turned over to the neutral government of Adelphous III in 2280 and renamed Adelphia-One. (Star Trek: Dauntless: "Paradox", Parts 1, 2 & 4)

Epsilon 18 was one of the outlying communications relays in the Federation. (Orion Press: Insanity's Child)

Federation/Romulan borders[]

The counterparts to the Epsilon Monitoring Stations along the Federation/Romulan border were the Earth Outpost Stations. (TOS: "Balance of Terror")

External links[]

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