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By Root 712 0

chided himself. It wasn't easy listening to nothing for hours on end. It would have been a good idea, he thought, to let sonarmen read on duty. He had better sense than to suggest it. Mr. Thompson might go along, but the skipper and all the senior officers were ex-reactor types with the usual rule of iron: You shall watch every instrument with absolute concentration all the time. Jones didn't think this was very smart. It was different with sonarmen. They burned out too easily. To combat this Jones had his music tapes and his games. He could lose himself in any sort of diversion, especially Choplifter. A man had to have something, he reasoned, to lose his mind in, at least once a day. And something on duty in some cases. Even truck drivers, hardly the most intellectual of people, had radios and tape players to keep from becoming mesmerized. But sailors on a nuclear sub costing the best part of a billion—

Jones leaned forward, pressing the headphones tight against his head. He tore a page of doodles from his scratch pad and noted the time on a fresh sheet. Next he made some adjustments on his gain controls, already near the top of the scale, and flipped off the processors again. The cacophony of surface noise nearly took his head off. Jones tolerated this for a minute, working the manual muting controls to filter out the worst of the high-frequency noise. Aha! Jones said to himself. Maybe SAPS is messing me up a little—too soon to tell for sure.

When Jones had first been checked out on this gear in sonar school he'd had a burning desire to show it to his brother, who had a masters in electrical engineering and worked as a consultant in the recording industry. He had eleven patents to his name. The stuff on the Dallas would have knocked his eyes out. The navy's systems for digitalizing sound were years ahead of any commercial technique. Too bad it was all classified right alongside nuclear stuff . . .

"Mr. Thompson," Jones said quietly, not looking around, "can you ask the skipper if maybe we can swing more easterly and drop down a knot or two?"

"Skipper," Thompson went out into the passageway to relay the request. New course and engine orders were given in fifteen seconds. Mancuso was in sonar ten seconds after that.

The skipper had been sweating this. It had been obvious two days ago that their erstwhile contact had not acted as expected, had not run the route, or had never slowed down. Commander Mancuso had guessed wrong on something—had he also guessed wrong on their visitor's course? And what did it mean if their friend had not run the route? Jones had figured that one out long before. It made her a boomer. Boomer skippers never go fast.

Jones was sitting as usual, hunched over his table, his left hand up commanding quiet as the towed array came around to a precise east-west azimuth at the end of its cable. His cigarette burned away unnoticed in the ashtray. A reel-to-reel tape recorder was operating continuously in the sonar room, its tapes changed hourly and kept for later analysis on shore. Next to it was another whose recordings were used aboard the Dallas for reexamination of contacts. He reached up and switched it on, then turned to see his captain looking down at him. Jones' face broke into a thin, tired smile.

"Yeah," he whispered.

Mancuso pointed to the speaker. Jones shook his head. "Too faint, Cap'n. I just barely got it now. Roughly north, I think, but I need some time on that." Mancuso looked at the intensity needle Jones was tapping. It was down to zero—almost. Every fifty seconds or so it twitched, just a little. Jones was making furious notes. "The goddamned SAPS filters are blanking part of this out!!!!! We need smoother amplifiers and better manual filter controls!!" he wrote.

Mancuso told himself that this was faintly ridiculous. He was watching Jones as he had watched his wife when she'd had Dominic and he was timing the twitches on a needle as he had timed his wife's contractions. But there was no thrill to match this. The comparison he used to explain it to his father was the thrill you