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- As originally defined, the Red Line is the distance beyond which jump calculations have an unacceptable uncertaintly factor. I'm sure Kevin Grazier (our Tech guy at JPL) could put it more accurately, but the calculations involved at that distance involve so many variables that we're not always sure where we'll end up -- such as in the center of a star, for example. We've been using five light years as a rule of thumb, but the actual capabilities of Colonial jump calculation computers are classified. The Cylons, however, are considerably better at making those calculations.