The Depot

Kesir Depot came up on the long-range plot four hours before *Pelican* was close enough to see it as anything but a transponder return, and even at that range it announced itself the way old stations do — by the shape of its heat. Dai had the thermal overlay running on the auxiliary display, and the depot sat in it as a lopsided bloom, brighter on one flank than the other because half its radiator array had been re-canted years ago after a panel failure and never trued back. It rejected its waste heat unevenly. It always had. The crews who worked the middle legs of the circuit could pick Kesir out of a field of returns by that lopsided bloom alone, the way you might know a friend by his walk.

Ilse brought *Pelican* in on a slow closing rate, matching the depot's spin at the docking collar before the collar was even resolved as a ring rather than a smear. She did it without commentary. The approach checklist ran down her side of the console in green, each item cleared by the physical act it named — attitude, closing velocity, relative range, contact — and she read none of them aloud because there was no one aboard who needed them read. Bek watched from the relief seat with his hands in his lap, which was where a second pilot's hands belonged during someone else's approach.

The collar took *Pelican* with a shudder that came up through the deck and into the soles of their boots, a hard mechanical bite that had no sound in it until the seal completed and the transfer trunk pressurised and the noise arrived all at once, conducted through steel and then through air: clanks, the whine of a pump somewhere in the depot's belly spinning up, the long low groan of two structures that were not quite the same temperature learning to share a load. The trunk smelled, when they opened *Pelican*'s hatch to it, of the depot — a smell every crew knew and none could have described to an outsider, hot metal and old lubricant and the particular staleness of air that had been scrubbed too many times through filters overdue for change. It was not a clean smell. It was a working one.

Kesir was cramped in the way of everything built to a budget in the early decades of the circuit, when nobody had believed the sport would last long enough to justify volume. The corridors were single-file. Handholds were worn smooth and slightly greasy. The spin gave you weight of a sort along the outer ring, enough to keep your feet down and your inner ear confused, and turning a corner meant leaning into a Coriolis push that the body of anyone who worked here had long since stopped noticing. Dai noticed it. He always noticed it, and said nothing, and put his hand out to the bulkhead half a second before he needed it.

The refuelling was the reason they had come, and refuelling was not a thing you rushed.

Soraya had run the numbers on the way in and had them written on the strategy slate in her own shorthand: *Pelican* would take on propellant to bring the tanks back to the load she had planned for the run to the championship leg, no more, because mass was velocity you had to shed later and every kilogram loaded here was a kilogram that would cost delta-v to move for the rest of the season. She wanted the tanks at a specific figure and she stood over the depot's transfer clerk while the figure was entered, and the clerk read it back, and Soraya said *that's the number* and initialled the order.

The depot's transfer hardware was housed in a compartment off the main ring that ran ten degrees warmer than the corridors because the pumps lived there. Two of them, large centrifugal units in insulated housings, with the propellant lines running out of them in a bundle as thick as a man's leg — insulated, jacketed, tagged at every junction with a colour code that told you what was inside and at what pressure. The propellant was cryogenic; it had to be, to be dense enough to be worth carrying, and everything about the transfer was organised around the twin facts that it was very cold and that it was under pressure, and that the meeting of those two facts with a warm human being was to be prevented by procedure at every step.

The depot's transfer lead was a broad, unhurried woman named Petrossian who had worked Kesir for eleven years and treated the procedure as liturgy. She met Ilse and Dai at the transfer compartment because the receiving crew had to be present — that was a rule, and it was a rule with a body count behind it somewhere in the sport's history, though nobody at Kesir could have told you whose. The first thing she did was break the line.

Breaking the line meant draining and purging it before anything was connected to *Pelican*. A propellant line left charged between transfers held residual cryogen and residual pressure, and a residual could flash to gas the instant a seal was disturbed, and a flash of cold high-pressure gas into a compartment with people in it was the kind of event the procedure existed to make impossible rather than survivable. So Petrossian vented the standing line to the depot's recovery tank, watched the pressure gauge fall to a value she read aloud, and then purged the line with an inert gas that would not burn and would not react, flushing it through twice while Dai watched the analyser at the compartment's outboard bulkhead.

"Oxygen's clear," Dai said. "Nominally. It's reading zero point two percent, which is instrument floor. So — clear."

"Clear," Petrossian agreed, and did not argue with the qualification, because she had worked with engineers before.

The seals came next. A propellant coupling had two seals, a primary and a secondary, and the point of the secondary was that it captured anything the primary let past and routed it to a telltale — a small vent with a sensor on it, so that a slow leak announced itself as a reading rather than as a smell, or a fire, or nothing at all until it was a great deal. Petrossian inspected the primary seal on the depot side by eye and by feel, ran a gloved finger around its seat, replaced it from a sealed packet even though the old one looked serviceable, because the schedule said replace and the schedule did not care how the old one looked. She inspected *Pelican*'s coupling the same way. Ilse watched her do it and said nothing, which from Ilse was approval.

Then the contamination check, which was the part the outsider never understood the point of and the crew never skipped. Petrossian drew a sample of the depot's propellant into a small sealed vessel and fed it to the analyser, and the analyser looked for water, for particulates, for the specific breakdown products that told you a batch had been stored too long or too warm or had picked up something from a tank that had not been properly passivated. Water was the enemy. Water froze into ice crystals at these temperatures, and ice crystals scoured seals and jammed valves and turned a clean transfer into a slow ruin that you would not discover until a valve stuck three legs later with your margin already spent. The analyser gave its verdict as a set of numbers against a set of limits, and the numbers were inside the limits, and Petrossian read each one aloud and Dai copied each one down.

"Water's four parts per million," she said. "Limit's ten."

"Four," Dai said, writing.

"Particulates nominal. It's good batch."

The transfer itself was almost an anticlimax after all the preparation — which was the point of the preparation. Petrossian brought the pumps up slowly, watching pressure and temperature on both sides of the coupling, holding the differential inside a band because too great a pressure differential across a cryogenic line stressed the seals and too fast a chill-down thermally shocked the metal, and steel that had been cycled cold-warm-cold enough times developed the kind of fatigue you found out about at the worst moment. The load crept up on Soraya's slate. The tanks took it. The whole thing took the better part of two hours and produced nothing more dramatic than a set of gauges moving in the direction they were supposed to move, and at the end of it Petrossian shut the pumps down, purged the line again, broke the coupling, capped both ends, and signed the transfer log.

The log was signed by three people. Petrossian, who had run the transfer. A second depot hand, who had witnessed it and would have signed it whether or not he had watched a minute of it, because his signature certified that a witness had been present and not that the witness had been attentive. And a duty supervisor who came by at the end, glanced at the numbers, and initialled the sheet without looking up from a slate of his own. None of the three signatures belonged to the person whose hands had actually been on the couplings, because Petrossian had directed the work and a junior hand had done the fitting, and the junior hand's name was nowhere on the sheet. This was normal. This was how every transfer on the circuit was documented, and it was defensible, and it meant that the paper record of the fuelling described a set of certifications rather than a set of events.

While the tanks filled, Ilse walked the depot. It was a thing she did — a receiving pilot had the right to inspect the facility her crew was trusting, and most pilots did not bother, and Ilse always did.

Petrossian's junior hand walked her along the outer ring past the shield plating on the leading face, where the depot took whatever the middle legs threw at it. Kesir did not spin fast — a station this size held its spin low, and the felt weight along the outer ring was a fraction of a standard gravity, enough to give the floor a down and no more — but it swept a lot of sky in eleven years, and the leading shield showed it. The plating there was scarred. Not deeply. The scars were shallow gouges and pits, most of them no longer than a finger, running mostly in one direction across the plate — fore-to-aft, the direction of the depot's travel, which was where the impacts came from because that was the face that ran into things rather than being run into.

Over a run of maybe four metres the original plate had been cut out and replaced. The new plate was welded in, the weld beads laid down neatly and ground back, the metal a slightly different colour where it had not yet taken on the general discoloration of the old. Ilse stopped and looked at it. She put her gloved hand flat against the weld line and felt the ridge of it, the small honest imperfection of hand-work.

"This is recent," she said.

The junior hand — young, cheerful, glad of company — told her it was last cycle's work. The maintenance log had it, he said, and he pulled it up on his slate to show her: a line entry against the leading shield, *plate section replaced, cosmetic*, dated to the previous maintenance window, signed off, closed. Cosmetic. The word sat in the entry without apology. The plate had been scarred, the scarring was above the threshold the schedule set for replacement of appearance-critical plating on the leading face, and so it had been replaced, and the closure code was the one used for work that restored condition without addressing a fault, because there was no fault. Nothing had breached. Nothing had come through. The plate had done exactly what plate was for, which was to be scarred instead of the pressure hull.

Ilse asked what did that. She meant the scarring, the original damage, the pits and gouges that had made the plate worth replacing.

The junior hand had a plausible answer ready, because it was a question crews asked and he had answered it before. Some of it was manoeuvring debris, he said — Kesir ran its own thrusters to trim its spin and station, and the older units on the trailing quarter had a seal that shed, a known issue, patched every cycle, and the shed material came round and pecked at the leading face on the relative velocity. Some of it was just the environment, the general sleet of the middle legs, the things too small to catalogue that every structure out here accumulated. He said it the way you say a thing you believe, which he did, because it was true as far as he knew it, and it accounted for what he had seen, and he had never had cause to look further because nobody at Kesir ever had.

Ilse listened to all of it. She looked at the scoring again — mostly fore-to-aft, which fitted the environment; some of it not, a scatter of pits that ran across the grain at an angle, which fitted the shed-seal story if the shed material came round the way the hand said it did — and she did the thing she did with a reading that was almost but not quite what she expected, which was to hold it a moment longer than a satisfied person would. Then she let it go. The story fit. The log was clean. The plate had held. She thanked the junior hand and finished her walk, and came away with the impression the depot meant to give without meaning anything at all: that Kesir was old, and well-worked, and looked after by people who replaced a scarred plate before it needed replacing and wrote it down when they did.

Dai heard the folder before he understood he had heard anything.

He was in the corridor outside the depot's small meeting compartment, waiting on a filter cartridge from stores for *Pelican*'s scrubber, and the compartment hatch was open the hand's-width that a hatch stands open when the people inside have stopped thinking about it. Two men at a counter inside, one of them the duty supervisor who had initialled the transfer log, the other older, in the plain soft-suit of a league officer, with a slate open between them and an agenda on it. Dai was not listening. He was watching the corridor for the stores hand.

What reached him was the tail of it. The older man saying a figure — a cost, a remediation cost, the number itself gone before Dai registered it as a number — and then: *it's the same as last time, and it wasn't carried last time either.* And the supervisor, agreeable, unbothered, a man moving an item to make an agenda shorter: *next cycle, then.* And the older man: *next cycle.* Not resigned. Not grim. Two people agreeing about the disposition of a line on a list, the way you agree that a thing can wait because it has waited before and nothing came of the waiting.

The stores hand arrived with the cartridge. Dai signed for it, checked the part number against the scrubber's requirement — *that's the right number, at least* — and carried it back to *Pelican*, and the words *next cycle* went with him and stayed with him no longer than the walk, because they attached to nothing. He did not know whose folder it was. He did not know what was in it or what the number bought or why it had not been carried last time or the time before. He had heard two men decide to leave a thing where it was, and there was nothing in that to keep.

The Tarrant brothers were in at Kesir the same window, *Copperhead* on the collar two berths round the ring, and they found *Pelican*'s crew in the depot's cramped commissary and made themselves loudly at home, the way the Tarrants did.

There were two of them and they finished each other's arithmetic. They were running the belt legs this season, the long slow grinding legs out past the middle depots where the racing was less about flying and more about not breaking, and they were doing it in a boat that needed a refit they had not yet paid for and could not pay for unless the season ran to its scheduled end and paid out to its scheduled place. They said so, freely, because it was not a secret and because they wanted it understood.

"Half the field's got the wind up," the elder Tarrant said, over a bulb of the depot's bad coffee. "You hear it everywhere. Outer chain's late, the navigation service is late, somebody's cousin heard something. And I'll tell you what I tell all of them—"

"—the circuit's run through worse," the younger one said.

"The circuit has run through worse. There's not been a season cancelled in — go on, tell me a season that was cancelled."

Nobody could, because there had not been one.

"There's your answer," the elder said. "It holds because it always holds. You cancel a season on a rumour and there's people two berths round who don't get their refit and don't get their next season either, and then where's your circuit? It holds because people show up. We show up." He was a little too loud about it, and a little too pleased with himself, and he was not wrong. That was the thing Ilse noticed, sitting across from him with a bulb she was not drinking: he was not wrong. The circuit had always held. The reasons he needed it to hold were real reasons that would break real people if it did not. His confidence was not stupidity. It was a mortgage.

Bek asked him — because Bek asked things — whether the late navigation service worried him at all.

"It's administrative," the elder Tarrant said, with total certainty, and moved on.

There was one more thing, and it was between Ilse and Dai, and it did not resolve.

It was in the post-transfer walkdown, back aboard *Pelican*, checking the newly loaded tanks against the gauges before they buttoned up to leave. The number two tank's ullage pressure was reading a hair high — not out of limits, well inside, but higher than Ilse expected for the load and the temperature, and drifting, a slow creep across the minutes they watched it, a few units, steady.

"That's instrumentation," Dai said. "The transducer on two runs warm after a fill. It always reads high for the first hour and then it settles. I've got it logged from last time. It's the sensor, not the tank."

"It's drifting," Ilse said.

"Warm sensors drift. It'll settle."

Ilse watched the number. It was a few units. It was inside every limit there was. Dai had it logged from last time and last time it had settled, and the physics of a warm transducer reading high was real and known and boring. And it was drifting, and a drifting number was a number that was doing something, and *settling* was a thing you said about a number after it had stopped, not while it was still moving.

"We'll watch it on the leg," she said. Which was not agreement, and Dai knew it was not agreement, and did not push, because there was nothing to push against — two readings of one gauge, both defensible, neither proven. He wrote the ullage figure in his log with the time beside it, and then, out of habit, checked the time against the relay's stamp and corrected his own by four seconds, and wrote the corrected time, and thought nothing of it.

They broke the collar an hour later. The lopsided bloom of Kesir's radiators fell away behind them, still rejecting its heat unevenly, still exactly as it had always been.