Gravity Well

The argument started the way most of their arguments started, over a schedule nobody had agreed to.

Nat Dahl came off her morning shift at thirty-three years old and carrying a coffee bulb she'd already half drained, and she stopped dead in the main corridor because Mike Mueller had taped a printed roster over her name on the shared training board. His pods, his slots, his cadets. Her Thursday block had been crossed out with a marker line so thick it looked angry.

She peeled the tape off and held the paper up when he walked by ten minutes later.

"This is mine," she said.

"It was," Mike said. He was thirty-five, taller than her by half a head, and he had the specific calm of a man who knew he'd started something. "I reassigned it. Your cadets got the Tuesday block instead."

"My cadets fly Thursdays. That's when their coursework syncs. You know that."

"So move their coursework."

The corridor had that late-morning feel where everyone going somewhere walked a little faster, and a group of six cadets came around the corner from the galley just in time to see two senior instructors standing nose to nose over a piece of paper. Nat knew they were watching. She knew Mike knew it too, and that made it worse, because now neither of them could back down without losing something in front of the trainees they were supposed to be teaching composure to.

"Three years I've run combat prep on this station," Nat said. "Three years my pass rates have been above yours, and you don't get to just take my floor time because your engineering track cadets like flying with you better."

"My cadets need the pod because their drills are coming up."

"Our drills are the same week. It's the station drills, Mike. Everyone trains for the station drills."

"And my methods are going to win them."

"Your methods are a spreadsheet."

Mike leaned in a little. It was probably not even deliberate, just the natural drift of two people arguing in a corridor built for one-way traffic, but Nat set her coffee bulb in the wall clip with a click that sounded louder than it was, and a cadet in the group later swore they'd both squared up. Nobody swung. Gregor Baker's voice came over the corridor comm before anything could, flat and unamused, asking both instructors to report to his office, and the word both landed on them like a fine.

Nat picked up her coffee. Mike picked up his roster. The cadets drifted off to their stations, disappointed in the way people are disappointed when they wanted a show and got a lecture instead.

---

Baker's office was four meters by three and had a window that looked out on the storms churning in the gas giant's upper bands, which was the only good thing about it. He was fifty-two, twenty years on the Hub, and he didn't stand when they came in. He just pointed at the two chairs and waited until they'd both sat down before he said anything.

"I got two reports this morning," he said. "One says somebody drained the coolant from pod three's handholds overnight. The other says somebody reprogrammed the lighting sequence in the same pod so it strobes mid-drill. Anybody want to guess who filed which report?"

"Director, that lighting thing was a maintenance bug," Mike said.

"Then it's a bug that only fires when Dahl's cadets are in the pod."

Nat started to say something about the coolant and Baker held up one hand. That hand had ended a lot of arguments over the years, and both instructors had been on the receiving end of it enough times to recognize it.

"I don't care who did what," he said. "That's not what this is about. What this is about is that in ten weeks the review board comes through, and if one of you puts the other in a medical bay, I lose two instructors and this station loses its safety rating. So here's how it's going to be. You two are jointly responsible for pod three's maintenance until the drills are over. Both names on the work orders. Both signatures. If it breaks, you fix it together, and you'll have to be in the same room to do that."

"That's insane," Nat said.

"It's the only thing I've got that's worked on people dumber than you," Baker said. "Be glad you're not dumber."

So that was how Nat Dahl ended up spending her off shifts in a zero-G pod with the man she'd spent three years trying to outperform. The first session was mostly silence. They checked the handhold bolts and the air scrubbers and the emergency vents, and the only words exchanged were inventory words, numbers and part codes, and even that was more conversation than they'd had since the previous year's drills. Mike was thorough. She hated that he was thorough. It was easier to dislike somebody who cut corners, and he didn't, and it turned out that was its own kind of annoying.

By the third session they'd worked out a system where he read the pressure diagnostics while she ran the physical checks, because his hands were steadier on a torque wrench and hers were faster with a probe, and neither of them said out loud that this was cooperation. It just happened. The pod was a big glass-walled cylinder bolted to the hub's spine, and when they floated in it together with the gravity rings spun down, there wasn't anywhere to put your body that wasn't near his body, and after a while that stopped registering as a problem and started registering as a fact.

On Friday of the second week, Mike had the day off and Nat went in alone to recalibrate the tumble sensors, which was a two-person job she'd talked Baker into letting her do solo because Mike had a family thing, which was a lie she'd told on his behalf without checking whether it was true. He didn't have a family thing. She just wanted the pod to herself for four hours.

She got through the port-side sensors and was halfway through the starboard bank, feet hooked under a rail, floating on her back with the readout pad above her, when she heard the valve go.

It didn't sound like much. A soft clunk somewhere behind the wall paneling, then a hiss that started low and climbed. Nat knew every noise that pod made, and this wasn't one of them. She flipped over and saw the pressure readout on her pad already falling, saw the warning stripe come up amber then red across the pod's interior, and understood, in the specific calm way you understand things in an emergency, that the vent valve had failed open and the room was going to dump its atmosphere.

She keyed the comm. "Control, pod three, vent failure, I need an emergency seal."

The comm answered with static. Of course it did. The valve failure had taken the pod's comm bus with it.

The pod's exterior hatch was dogged from the outside during sensor work, standard procedure, which meant the only way out was the service lock at the base, and the service lock would not cycle against a pressure differential. When the room vented, the lock would open for about four seconds and then everything in the room, including her, would be pulled through the vent line. She did that math in about two seconds and it came out bad.

Then the outer hatch wheel turned.

Mike came through it like he'd been thrown, because the pressure differential behind him had helped, and the first thing he did was not yell at her. The first thing he did was grab the manual valve lever mounted by the hatch and throw his whole weight on it, and the vent line slammed shut, and the hiss died, and the room went quiet enough that Nat could hear her own blood in her ears.

"Control," he said into his suit comm, calm as a man reading a parts list, "pod three, vent valve failure, manual shutoff, one soul aboard. Get a seal team down here."

Then he turned around and looked at her, still floating there with the readout pad in one hand, and some of the calm left his face.

"How long were you in here alone?" he said.

"Hour and a half, maybe."

"Maybe."

"I told control I was in. Control logged it."

"Control logged it and control wasn't here." He pushed off the wall and crossed to her, and for a second she thought he was going to grab her by the suit front and shake her, and she braced for it, and instead he just stopped a meter away and let out a breath that fogged his visor. "You could've died in here. Ten more minutes. Maybe eight."

"But I didn't." Her voice came out steadier than she'd expected. "You yanked me out. Good rescue. Very textbook."

"Shut up, Nat."

"Okay," she said, and shut up, which surprised both of them.

The seal team arrived eleven minutes later and walked them out through the service lock, and the debrief in the med bay took forty minutes and consisted mostly of a medic telling Nat her ears would ring until tomorrow and Mike standing in the doorway not leaving. Baker came down personally, and he looked at the failed valve, and he looked at the two of them, and he said the sabotage investigation was now a structural failure investigation, which meant neither of them had done it, which meant they'd spent two weeks accusing each other over a cracked gasket and a bad solder joint.

Neither of them mentioned the roster argument again for a while after that.

The writeup from the incident took Carly Rhodes three days to finish, and when she called them both into her office on Tuesday of the third week, she had it printed out and highlighted in three colors. Nat had never seen a document so thoroughly hated by its own author. Carly sat behind her desk with the safety officer's version of a flat face, which was a face that had already decided everything and was now just doing paperwork about it.

"Structural failure," Carly said. "Cracked gasket, bad solder joint, and a maintenance log that both of you signed off on without inspecting either one. I pulled the log. Your names are on it in that order, oldest first."

"Joint responsibility," Mike said.

"That's one way to read it." Carly turned a page. "Here's mine. You two spent two weeks reprogramming each other's lighting and draining each other's coolant, and neither of you spent two minutes on the actual valve, because you were both too busy watching each other instead of the equipment. Nat, you went into that pod alone on a two-person job. Mike, your name was on that work order and you never checked who was actually in the pod."

Nat started to say that the solo job had been approved, which it was, and that the comm failure was the valve's fault, which it also was, and Carly held up one hand without looking up.

"I'm not assigning blame for the valve. The valve was nobody's fault. I'm assigning blame for everything around the valve, which was both of your faults." She pulled a second sheet off her desk and slid it across. "Both your drill ratings take a fifteen percent dock until the station drills. Baker signed off on it this morning. He wanted to see you himself but he's mediating a dispute in hydroponics that apparently also involves sabotage, which, congratulations, you two are contagious."

Nat took the sheet and read it. Fifteen percent was real money against the lead instructor posting, which weighted drill ratings directly, and Carly had to know that, and Carly had docked them anyway, and that told Nat exactly how close Carly thought they had both come to dying in a metal cylinder for the crime of disliking each other.

"Can I appeal this to Baker?" Nat asked.

"You can. He'll tell you the same thing I'm about to say, which is that you're lucky. The service lock math was four seconds. I did the math myself. Four seconds, and the review board comes through in seven weeks, and if that valve had gone on their schedule we'd be a cautionary filmstrip instead of a station." Carly looked up then, and her face was not flat at all. "I've known you both three years. I like you both. Fix your pod."

They walked out of the office together because there was only one door, and stood in the corridor for a moment in that specific silence two people share when they've just been yelled at jointly and neither wants to be the first to acknowledge it.

"Well," Mike said.

"Well," Nat said.

A passing crew tech gave them a wide berth, which Nat decided was fair. They probably looked like a pressure hazard themselves, standing there with their matching disciplinary notices. Mike folded his copy into a neat square and put it in his belt pouch, which was the most Mike thing Nat had ever watched him do, tidy even in disgrace.

"Fifteen percent," she said.

"Yeah."

"Until the drills."

"Yeah." He rubbed his jaw. "Could've been worse. She could've made us write the incident report together."

"She did. Page three."

He went still for a second, then pulled his copy back out and unfolded it, and there it was, item eight, joint corrective action, co-authored maintenance protocol for pod three, both signatures required. He folded it up again and put it away. "Huh," he said, which was more or less the whole conversation, and they went their separate directions down the corridor, and Nat noticed she was annoyed about that, which was a new and unwelcome piece of information about herself.

The thing sat in her head for three days. Not the dock, which stung but was fair. The other thing, the four seconds thing, which she kept doing the math on at odd moments, over coffee in the