"This D-5 is monitoring everything that's reaching the antenna arrays mounted outside this ship. If it's non-coded it immediately translates it. We have the computers programmed to look for certain things on the commercial channels. For instance, a shipping order for IFF missiles gets tagged into a higher priority slot. We can even look for orders related to just one component of an IFF missile. If certain patterns of shipping develop or if something outside of the ordinary happens, the computer will alert a human operator who then analyzes it and decides if there's something important enough that it has to be kicked upstairs. That's the key job, looking for the little nugget of gold inside the tons of gravel and mud.
"One of the first things that started to tip us off to the fact that the Kilrathi might be building something was that certain commercial links for the ordering of military parts suddenly went into a new code system, which was changed every eight days. Significant orders for supplies, parts, and shipping became highly classified.
"That started some real questions being asked. The problem was that they shifted this classified work to the part of the Empire out beyond Kilrah, as far from our listening posts as possible The question of why really put the pressure on us to get this D-5 on line and also caused the loss of a lot of good intel people behind the lines. The jump we just completed is the deepest in we've ever been able to take equipment like this. You can see already the streams of data pouring in.
Richards led them over to his command booth and offered a couple of cups of coffee to his guests. Jason noticed that these people seemed to live on caffeine, and a fair number of them were addicted to Ian's habit of tobacco, a practice he found totally mystifying and somewhat disgusting.
"The D-5 can monitor any signal within its six hundred light year range and pinpoint its origin. The hard part is programming it to figure out what is worth looking at out of the billions of messages it picks up every day and then passing it to a human analyst for evaluation.
"The analyst's job is the toughest. It takes someone with a sixth sense to decipher what appear to be unrelated facts but actually are part of a pattern.
"We do the same thing for the media channels, the public communication lines, and of course the military and government lines," and he pointed to the flashing red and yellow lights back on the holo display of Kilrah.
"Those are the tough buggers, a lot of it is burst signalled and highly encoded."
"Damn, there's hundreds of them," Jason said. "Something must be up."
Vance laughed softly.
"Over ninety percent are dummy channels, broadcasting complete gibberish, total nonsense words that actually tie up most of our decoding equipment since we're not sure if its garbage or the real thing. Sometimes you might have a burst signal with a million words in it, all encoded, and the real message is twenty words in the middle, each word separated from the next by say six thousand four hundred words.
"Why that number?"
"Remember they have eight fingers and we have ten, so their numerical system is base eight. We tend to look a bit more intensely at base eight numerical lines as a result. What gets frustrating is that they are using at least a dozen different codes at any given time, with the highest level material going on what we call Fleet Code A, which tends to change every twenty-four to forty days. The real messages are hidden in a lot of garbage and we have to wade through each message and might spend weeks tracking down promising stuff only to discover its a decoy."
"Some of their people even have a sense of humor about it. One message, when finally translated, was a simple 'Hey, stupid, we fooled you,' and another was a long excerpt from what I guess was a Kilrathi dirty book. Decoding and translating each of those things took up time and equipment. We can't ignore a single message because we never know if we might hit paydirt or not. So we wade through all of this, figure out the real signals from the fake, then spend a hell of a lot of time cracking the code, and just when we think we've got it, they go and change the code and we're back to square one. Then to top it off they might have a station that's quiet for weeks or months, and it pops off a lone burst signal then shuts down. Trying to even figure out where it came from out of a billion cubic light years of space was nuts until the D4 model, which could do a Doppler analysis and at least do a probable trace."
"I'd go mad," Tolwyn said.
"Some of us do," Vance replied. "It takes a special kind of person to do this. You fighter jockeys, your battle is one of skill and wits, but it gets played out in seconds. Some of our battles last years.
Vance smiled.
"I've been in this game for twenty-nine years. I've dreamed all those years of having something like this D-5. With the new antenna array we can pick up bursts from up to six hundred light years out; only a couple of generations back in the system we were lucky to get consistent reads from ten light years away. We used to spend billions on recon drones which would go in, store up data for a week, then send out a burst signal. Once it signalled the Kilrathi would be onto it and take it out. Now this one system can cover an area that would have required thousands of drones.
"The big problem now is that counter intel believes they knew of the D-4 and maybe suspected our D-5. We've noticed a decrease in signal traffic and suspect they're shifting more to courier. So far we've yet to figure out how to read a dispatch pouch six hundred light years behind the lines."
As they continued to talk, Vance led them around the flight deck. Small cubicles had been set up in the center of the room, and hunched over in each was an operator, going through data that the computer felt was of sufficient importance to bring to the attention of a human operator.
"I've got a hundred and three analysts with me on this mission, each of them a specialist and the best in his field with eight or more years of training behind him. There are another forty programmers who feed in the requests and another twenty just to troubleshoot any glitches in the machine."
Jason looked around the room, wondering just who indeed was paying for all of this. He had his suspicions but knew it was best not to ask. What was equally troubling was the matter-antimatter mine that was almost casually brought aboard with the rest of the equipment. It was placed in the center of the room and would be activated if it appeared as if Tarawa might be captured. In this case there was definitely no surrender although, technically, they were not even at war.
A technician came up to Vance's side, looked over at Jason and Tolwyn and said nothing. Vance smiled and nodded.
"I think Jenkins here has something to tell me that he'd rather not say in front of the two of you," Vance said quietly.
Tolwyn, smiling, nodded and turned and walked away.
"Hey, we're on the same team," Jason finally said as they went back down the corridor to the bridge.
"Just remember, Jason, if there's no need to really know, then you definitely better not know. Believe me, son, there's a hell of a lot I wish I didn't know at this moment."
Tolwyn looked over at him and smiled.
"Come on, I think it's safe for us to have a short drink, help us unwind. It's going to be a boring float out here until something comes up."
Jason was awakened by a gentle, but insistent shaking.
Damn, what was it now, and then he was instantly awake. The room was dark, there was no klaxon, no attack. He suffered a moment of disorientation, the old dream had come back, the explosions silently bursting across the surface of the moon orbiting Kilrah. Svetlana . . .
"Jason, it's Tolwyn, something's up."
He stood up, rubbing the sleep from his eyes and snapped on the light.