A ketric was a measurement of distance used by the Hirogen, roughly equivalent to the sensor range of the USS Voyager.

In 2374, a Hirogen warship detected the USS Voyager as being four thousand ketrics away from a module of the Hirogen communications network. (VOY: "Hunters")

The Star Trek Encyclopedia (4th ed., vol. 1, p. 414) stated ketric was equivalent to several kilometers.

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