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knots, about eleven hundred miles per hour. Not quite Mach 2, but already it was risky. And their vector was 085, with coordinates of 46 degrees latitude, 143 degrees longitude.
What now? Daedalus had all the active radar systems known to modern avionics. Looking at the screens he saw forward-looking radar, sideways-looking radar, a four-beam multimode pulse-Doppler look-down radar, terrain-following radar, radar altimeter, mapping and navigational radar, and a host of high-powered ECM jam¬mers. The problem was, they all emitted EM, electromag¬netic radiation. Switch on any of those and they'd become a flying radio beacon, broadcasting their position.
The next row of screens, however, provided readouts of their passive, non-emitting receivers and analyzers. That clearly was what they would have to use to monitor the threat from Sakhalin, scooping up any EM for lightning-fast computer processing. Surely Petra could spit out a fingerprint of everything in the skies. To begin with, there were the basic Radar Warning Receivers (RWRs) located aft, on the tailplanes, as well

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