Below Mercury

by Mark Anson

  ‘Now, you gentlemen will be passengers on the voyage, but each of you will have daily work duties to perform. Captain Foster will assign your duties while on board, and you will complete these to the best of your ability, or forfeit certain privileges. You’re going to be in space for over three months, and it’s essential that discipline is maintained. The mission commander has legal powers to remove privileges, restrain, or even sedate you, if in her view any of you become a hazard to the ship or to the success of the mission. Your space pay allowances from your employers will be paid through the Astronautics Corps, and I remind you that we have powers to make deductions from this pay for any breaches of discipline.

  ‘There’s no turning round once you’re in the transfer orbit; the only way back here is by going to Mercury and returning, so it’s no good having second thoughts once you’re on your way.’

  Matt had heard this sort of blunt warning before. There had never been an actual mutiny on a spaceflight before, but it had come close on more than one occasion. Long flight times, and the boredom and isolation of deep space, could cause apparently trivial issues to blow up out of all proportion. There were many similarities with the long ocean voyages of past centuries, and the captain’s word literally had to be law.

  ‘Mr Abrams, as the representative of the SAIB, is in overall charge of the mission once you are safely delivered to Mercury and your equipment offloaded. The initial mine entry will be led by Mr Bergman, representing the Space Mines Inspectorate, and once he has conducted a thorough safety assessment, Mr Abrams will take over and lead the investigation to a conclusion.

  ‘In a change to your briefing notes, Mr Bergman is now also representing the interests of the Space Graves Commission. As you will be entering a designated space grave, there are some formalities and procedures that need to be observed while you are in the mine, as well as the exit and sealing procedures.’

  Helligan continued to cover the roles of each member of the mission team. He left Matt until last, ensuring that Matt was in no doubt as to where he came in the perceived order of importance.

  An hour later, in the first break of the day, Matt found himself facing Clare, who had come up to speak to him.

  ‘You’ve been to Mercury – to Erebus Mine – several times before.’ She made it sound faintly like an accusation.

  ‘Yes. I did three trips over about six years, including the last one just before the accident.’ He sipped his coffee.

  ‘What do you remember of the approach and landing? I’ve studied the charts, and I’ll be starting landings in the simulator next week, but it would help to know what it’s like from someone who’s been there.’

  ‘Oh, sure.’ Matt gathered his thoughts, and tried to remember. ‘Well, you can’t usually see much from the crew shuttles, but there was one time I was sitting right behind the copilot, and I had a pretty good view. The Sun was lighting up all the craters from the side as we got closer. It looked very dramatic, kind of scary.

  ‘Meng-fu crater itself is massive, it dominates the horizon as you approach, and when you go down into it, well – it’s just one huge black pit; you can’t see anything inside it. It feels like you’re just falling down into nothingness. When you’re deep down inside the crater, and you get used to the darkness, you can see the mine and the refinery lights from some way off, and then as you get closer you can see the landing pad itself – it was floodlit then, but of course it won’t be for us.’

  Clare nodded, and took a drink of her coffee, but Matt sensed he hadn’t told her anything she didn’t know already.

  ‘So, why do you want to go back?’ she asked suddenly.

  Matt was surprised by the directness of her question, and his mouth fell open slightly.

  ‘I – represent the relatives class action group, and—’

  ‘I know what you’re there to do,’ she interrupted, ‘but the relatives would never have proposed you as their representative if you hadn’t wanted to go back.’

  Matt wondered if he wanted to tell her. The directness of this serious young woman was disconcerting.

  What the hell. They had to spent months cooped up together anyway.

  ‘Well, the accident left me feeling – like I’d escaped, and they hadn’t. I wasn’t any better than any of them, it could have been me in the mine. Going back makes me feel like I’m somehow making – amends for things.’

  Matt paused. It had been a long time since anyone had asked him how he felt about anything. His throat had gone dry, and the last words had been difficult to get out. He took another drink of his coffee.

  Clare stared back at him for several seconds before replying, but her gaze had softened.

  ‘So. You feel guilty for surviving. It’s not unusual. But there must be other ways of coping than by going back. Haven’t you been offered any counselling?’

  Matt looked down, and he hesitated, wondering if he should tell her.

  ‘Yes – I had several sessions in the early days after the accident,’ he said at last, ‘but it didn’t really help, and I stropped going after a while. I felt such a fake – I was one of the survivors, after all.’

  ‘It doesn’t mean you don’t deserve a bit of help.’

  ‘Maybe. But none of the counselling seemed to work. I guess that’s why I got involved with the relatives, and the class action – I felt like I was helping people who really needed it.’

  Clare waited, listening.

  ‘I just need to know what happened. I keep seeing it – the accident – imagining what it was like for them. It’s worse than not knowing. I’ve got to go back and see it with my own eyes. I’ve got to know how they died.’

  Picture: Orbital plan

  CHAPTER TEN

  Helligan stood at the front of the room as they finished their break, flanked by a thin, sandy-haired man in civilian clothes. Matt recognised him from earlier briefings as Rawlings, the mission planner.

  Rawlings was one of the civilian specialists retained by the Corps for their expertise in crucial areas. He had a hurried manner that gave the impression of him never having enough time, and the pale complexion of someone who spent too much of his time away from the Sun, in darkened control rooms in the bowels of FSAA facilities. He seemed nervous and ill at ease as Helligan introduced him to the team, and as Helligan went to sit at the back of the room, Rawlings dimmed the lights at once, as if he felt safer in the familiar darkness.

  A view of the Inner Solar System appeared on the viewscreen wall behind Rawlings, silhouetting his head and shoulders.

  At the centre of the display, a tiny Sun burned, and the planets circled round it like glittering marbles in space, following the coloured ellipses of their orbits as they moved round in accelerated time.

  The display zoomed in on the three innermost planets. The blue globe of the Earth moved slowly at the edge of the screen, Venus a little faster, following the yellow circle of its closer orbit, and finally Mercury, pursuing its highly eccentric orbit close to the Sun.

  ‘This is the situation of the planets right now,’ the silhouette of Rawlings said, freezing the display. ‘The launch window we’re recommending is here—’ he fast forwarded the display a few months ‘—in the early hours of May fourth. Transfer orbit insertion at zero six thirty UTC will put you onto a minimum-energy trajectory to Mercury, with a journey time of just over ninety-seven days.’

  The display moved forward again, and a thin green line sprouted from Earth and curved inward, converging on Mercury. The mission planner stopped the display as the green line touched the innermost planet.

  ‘Your rendezvous with Mercury is on August ninth, six days before Mercury’s closest approach to the Sun. The orbit insertion manoeuvre takes you over the North Pole, and into a standard polar orbit.’

  Rawlings zoomed in closer on the display, and the tiny dot of Mercury expanded until it became a grey globe. A graphic of a space tug appeared at the end of the green line, moving against the background of the stars. The mission tea
m watched as the tug fired its engine, slowing down and moving into a circular orbit around Mercury.

  Clare leaned forward. The tiny aircraft-shape attached to the front of the tug occupied her full attention.

  ‘Just a moment,’ she said.

  Rawlings halted the animation.

  ‘What kind of ship are we going down to the surface in?’ She pointed at the screen.

  ‘You’re going to be flying one of the Martian spaceplanes – most likely a modified Olympus two-forty,’ Rawlings said quickly, glancing towards the back of the room. ‘We had one back from Mars last month that needed a major overhaul. We’ve bumped it up the priority list, and it’ll be refitted for the mission.’

  ‘You’ve got to be kidding.’ Clare shook her head in disbelief. ‘Why are we taking a spaceplane down to Mercury? Why can’t we use one of the crew shuttles?’

  ‘Because we don’t know what state the landing pad is in after the refinery explosion,’ Helligan’s drawl cut in from behind her. ‘If the pad’s been put out of action by the explosion, a shuttlecraft won’t be able to land.’

  Clare started to speak, but Helligan waved a hand dismissively, and continued: ‘Look, shuttlecraft are designed for landing on flat, concrete pads; they’re not able to land on crater floors. And they don’t have the radiation shielding for an extended stay on the surface. Those spaceplanes are built to operate off dirt strips on Mars – they can take hard landings on rough terrain, and they’ve got plenty of shielding. It’s a safer option.’

  Clare subsided for the moment. Helligan had a point. If they had to land on the uneven terrain of a crater floor, she would rather be in the spaceplane. Still, it was a big, heavy craft to haul all the way to Mercury.

  ‘What about living space when we’re on the surface? We might be there for some time,’ she asked.

  ‘Inflatable Mars habitat modules, carried in the spaceplane’s cargo bay,’ Rawlings answered. ‘The spaceplane can supply all the power and air you need to run them while you’re there. The habitats have adequate radiation shielding for your stay, but you’ll have to retreat into the spaceplane if there’s a major solar event. In the most extreme cases, you may need to take shelter in the mine itself.’

  Clare nodded as she made a note in her pad. They seemed to have thought it all out.

  Rawlings was looking at her, as if waiting to see if she had more objections. She nodded for him to continue.

  Rawlings turned back to the display behind him, and restarted the animation from where the space tug entered orbit round Mercury.

  ‘Your orbit takes you directly over the South Pole, every ninety-six minutes,’ he continued. ‘Now, for the landing, you’ve got to make a special manoeuvre.’

  The animation showed the spaceplane undocking from the tug, and nosing round to latch onto a large, torpedo-like fuel tank, before starting its descent.

  ‘This drop tank provides the spaceplane with extra fuel for the mission, as there will be no refuelling facilities on the surface. The drop tank is jettisoned shortly after the de-orbit burn.’

  On the display, the empty tank fell away from the spaceplane. The display zoomed in further, following the craft as it fell out of the black sky toward the spreading landscape below.

  ‘Even with this extra fuel, making a descent to the surface and returning to orbit again is right on the limits for the mission. There is very little margin for error. You will be carrying a heavy load of fuel and equipment, which will limit your hover time over the surface before you have to commit to a landing. We have tried to maximise—’

  ‘Look, just cut to the bad news. How much hovering time do we have?’ Clare’s voice interrupted.

  The mission planner stopped, and he glanced at the back of the room first, before answering Clare’s question.

  ‘It’s going to be – sub-optimal. We calculate that with your fuel margins, and projected allowances for error, you’re looking at a little over – ah, ninety seconds.’

  ‘Sub-optimal?’ Clare threw her pen down. ‘Have you any idea how little time that is when you’re looking for a landing site?’

  Rawlings nodded, and opened his mouth to reply, but Clare carried on, her voice rising: ‘Let me spell it out for you. Even if we hit the de-orbit burn spot on, and we descend into the crater without wasting any fuel, we’ve got to locate the landing pad in the dark. There are no landing lights on the pad. Call that thirty seconds, if we’re extremely accurate with our navigation. A quick circuit round the pad to make sure it’s safe to land, and that there’s no obstacles to an abort. Another sixty seconds. And that’s it – we’ve used up our ninety seconds. That is just not enough margin. Minimum rules for manned missions are—’

  ‘—being revoked for this mission,’ Helligan’s voice cut Clare off. Helligan waved at Rawlings, and the lights came back up in the room.

  ‘This isn’t a routine flight, boys and girls,’ Helligan continued. He stood up and walked slowly round to the front of the room as Rawlings sat down. ‘This is a cutting-edge exploratory mission to an abandoned, probably wrecked, base with no operational refuelling facilities. You’re going to be close to the limits of fuel the whole way.’

  He let his words sink in.

  ‘Now, the captain here—’ he managed a little smile as he paused, ‘—has reservations about what we’re asking her to do. I’d like to remind you that all of you are volunteers and you’re under no obligation to proceed. If any one of you wishes to leave the mission team, I for one will have no problem in accepting that.

  ‘But let me make one thing clear. You bail now – right now – or you carry on with the training. If we spend all this time and money in preparing you for this mission, and then you pull out at the last minute, then I will personally ensure that you never go into space again, and that your superiors are left in no doubt about your prospects for future advancement. Do I make myself clear?’

  He looked at them all in turn, receiving answering nods and affirmations. He finished up with his eyes on Clare.

  She stared back, hating Helligan with a seething anger that wouldn’t go away.

  ‘Yes, sir,’ she said, leaving the gap between the words as long as she dared.

  Helligan’s porcine eyes narrowed.

  ‘You were saying, captain?’ he asked, his voice and gaze like steel.

  ‘I was pointing out that ninety seconds of fuel leaves barely any decision time, sir.’ Clare’s voice was quiet, but clearly audible in the hushed room.

  What’s wrong, Foster, aren’t you up to it? Are you so worried you’re going to crash, that you’ll abort the landing unless you’ve got five whole fucking minutes to work yourself up to attempting it?

  Helligan’s voice blasted back at Clare, but it was just in her head. Helligan hadn’t spoken. He was still looking at her, as if weighing her up.

  ‘Yeah, it’s not long, Foster,’ he said, ‘but we need someone who can deal with that. You told me you were up for this mission. Is that still the case?’

  All around her, the other faces looked at Clare.

  What was she to do? They were all waiting to see how she responded. Should she tell them how dangerous this landing could be, how there was a good chance that they could go past the point of no return, run out of fuel, and be stranded? Or that if she tried to land on rough ground and didn’t get it perfectly right, they could roll onto a wingtip, and it would all be over in seconds. Or would that put so many of them off that she would be replaced, with another, less experienced commander who would toe the Company line, and cheerfully fly them into disaster?

  She started nodding, to no one in particular.

  ‘Okay. I accept that we’ve got little choice. Let’s work on finding ways to buy us some more time on the landing.’

  Helligan looked back at her without speaking, knowing that if the exchange continued, she would put the wind up everyone.

  He turned away.

  ‘Mr Rawlings,’ he drawled as he moved to the back of the room again,
‘please continue your briefing.’

  The mission planner stood up again, and consulted his notes, turning pages over.

  ‘Okay, so you, ah, make the landing. The landing pad at Erebus Mine is less than two kilometres from the main mine portal, so it’s within walking range – you’ll need a motorised trolley for all your equipment, though. I’ll leave the details of the mine entry and exploration to my colleagues this afternoon, but – ah, yes?’

  Matt had raised his hand to ask a question.

  ‘I know the mission has been planned on the assumption that we can’t refuel on the surface. But there were a lot of fuel stores at Erebus – it was a main refuelling base. Is there any possibility that some of them have survived?’

  Rawlings shook his head emphatically.

  ‘Ah, no, Mr Crawford, even if the surface tanks have survived, they’ve had no power for their heaters. The temperature in the crater is so low that any liquid propane would have frozen solid.’

  Matt nodded.

  ‘Uh, what happens if we exceed our hover time?’ Bergman asked, ‘do we run out of fuel and crash?’

  ‘No sir. If you exceed the margin, you’ll still be able to land, in fact you’d have plenty of fuel to make a landing. But you’d be left with too little fuel to take off and make orbit again. You’d climb up towards orbit, run out of fuel, and come back down to impact the surface of the planet before you had completed one revolution.’

  ‘Right,’ Bergman said, in a quieter voice.

  The silence persisted, so Rawlings went on.

  ‘The return journey is the same in each case; you take off from the mine, rendezvous with the tug in orbit, and fire the engine to put you onto an Earth return trajectory. The timing of the return journey is flexible; we have prepared scenarios for three possible dates, depending on when your investigations are complete. The journey times range from ninety-four to a hundred and fifteen days, but we recommend the first window, which will get you back here by early December using a one-tangent trajectory.