Hyperwave signal interceptor

A hyperwave signal interceptor (HSI) was a sensor that detected the telltale fluctuations in the local hyperspace field that resulted whenever a starship entered or exited hyperspace. They could not indicate the origin or destination of a ship, but could record its entry or departure, as well as its mass and speed. Hyperwave signal interceptors were also capable of detecting hyperradio transmissions that caused minor fluctuations in the hyperspace energy field. The sensor could discover and tap into the transmission, but not decode the messages.

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