by Andy Weir
information. Lewis made the decision to act on it. If she let emotion cloud her judgment, she'd be a shitty commander. And she's not a shitty commander.”
“If I can ever prove it was you, I'll find a way to fire you for it.” Teddy warned.
“Sure,” Mitch shrugged. “But if I wasn't willing to take risks to save lives, I'd...” He thought for a moment. “Well, I guess I'd be you.”
Chapter 17
LOG ENTRY: SOL 192
Holy shit!
They're coming back for me!
I don't even know how to react. I'm choked up!
And I've got a shitload of work to do before I catch that bus home.
They can't orbit. If I'm not in space when they pass by, all they can do is wave.
I have to get to Ares-4's MAV. Even NASA accepts that. And when the nannies at NASA recommend a 3200km overland drive, you know you're trouble.
Schiaparelli Crater here I come!
Well... not right away. I still have to do the aforementioned shitload of work.
My trip to Pathfinder was a quick jaunt compared to the epic journey that's coming up. I got away with a lot of shortcuts because I only had to survive 18 sols. This time, things are different.
I averaged 80km/sol on my way to Pathfinder. If I do that well toward Schiaparelli it'll take 40 sols. Call it 50 to be safe.
But there's more to it than just travel. Once I get there, I'll need to set up camp and do a bunch of MAV modifications. NASA estimates they'll take 30 sols, 45 to be safe. Between the trip and the MAV mods, that's 95 sols. Call it 100 because “95” cries out to be approximated.
So I'll need to survive away from the Hab for 100 sols.
“What about the MAV?” I hear you ask (in my fevered imagination). “Won't it have some supplies? Air and water at the very least?”
Nope. It's got dick-all.
It does have air tanks, but they're empty. An Ares mission needs lots of O2, N2 and water anyway. Why send more with the MAV? Easier to have the crew top off the MAV from the Hab. Fortunately for my crewmates, the mission plan had Martinez fill the MAV tanks on Sol 1.
The flyby is on Sol 549, so I'll need to leave by 449. That gives me 257 sols to get my shit in gear.
Seems like a long time, doesn't it?
In that time, I need to modify the rover to carry the Atmospheric Regulator, Oxygenator, and Water Reclaimer. I call them “The Big Three”. All three need to be in the pressurized area, but the rover isn't big enough. All three need to be running at all times, but the rover's batteries can't handle that load for long.
The rover will also need to carry all my food, water, solar cells, extra battery, my tools, some spare parts, and Pathfinder. As my sole means of communication with NASA, Pathfinder gets to ride on the roof, Granny Clampett style.
I have a lot of problems to solve, but I have a lot of smart people to solve them. Pretty much the whole planet Earth.
NASA is still working on the details, but the idea is to use both rovers. One to drive around, the other to act as a trailer for all the shit I have to bring.
I'll have to make structural changes to that trailer. And by “structural changes” I mean “cut a big hole in the hull.” Then I can move the Big Three in and use Hab canvas to loosely cover the hole. It'll balloon out when I pressurize the rover, but it'll hold.
How will I cut a big chunk out of a rover's hull? I'll let my lovely assistant Venkat Kapoor explain further:
[14:38]JPL: I'm sure you're wondering how to cut a hole in the rover.
Our experiments show a rock sample drill can get through the hull. Wear and tear on the bit is minimal (rocks are harder than carbon composite). You can cut holes in a line, then chisel out the remaining chunks between them.
I hope you like drilling. The drill bit is 1cm wide, the holes will be 0.5cm apart, and the length of the total cut is 11.4m. That's 760 holes. And each one takes 160 seconds to drill.
Problem: The drills weren't designed for construction projects. They were intended for quick rock samples. The batteries only last 240 seconds. You do have two drills, but you'd still only get 3 holes done before needing to recharge. And recharging takes 41 minutes.
That's 173 hours of work, limited to 8 EVA hours per day. That's 21 days of drilling, and that's just too long. All our other ideas hinge on this cut working. If it doesn't, we need time to come up with new ones.
So we want you to wire a drill directly to Hab power.
The drill expects 28.8V and pulls 9 Amps. The only lines that can handle that are the rover recharge lines. They're 36V, 10A max. Since you have two, we're comfortable with you modifying one.
We'll send you instructions on how to step down the voltage and put a new breaker in the line, but I'm sure you already know how.
I'll be playing with high voltage power tomorrow. Can't imagine anything going wrong with that!
LOG ENTRY: SOL 193
I managed to not kill myself today, even though I was working with high voltage. Well, it's not as exciting as all that. I disconnected the line before I fucked with it.
As instructed, I turned a rover charging cable into a drill power source. Getting the voltage was a simple matter of adding resistors, which my electronics kit has in abundance.
I had to make my own a 9 Amp breaker. I strung three 3A breakers in parallel. There's no way for 9A to get through that without tripping all three in rapid succession.
Then I had to rewire a drill. Pretty much the same thing I did with Pathfinder. Take out the battery and replace it with a power line from the Hab. But this time it was a lot easier.
Pathfinder was too big to fit through any of my airlocks, so I had to do all the rewiring outside. Ever done electronics while wearing a space suit? Pain in the ass. I even had to make a workbench out of MAV landing struts, remember?
Anyway, the drill fit in the airlock easily. It's only a meter tall, and shaped like a jackhammer. We did our rock sampling standing up, like Apollo astronauts.
Also, unlike my Pathfinder hatchet-job, I had the full schematics of the drill. I removed the battery and attached a power line where it used to be. Then, taking the drill and it's new cord outside, I connected it to the modified rover charger and fired it up.
Worked like a charm! The drill whirled away with happy abandon. Somehow, I had managed to do everything right the first try. Deep down, I thought I'd fry the drill for sure.
It wasn't even midday yet. I figured why not get a jump on drilling?
[10:07] Watney: Power line modifications complete. Hooked it up to a drill, and it works great. Plenty of daylight left. Send me a description of that hole you want me to cut.
[10:25] JPL: Glad to hear it. Starting on the cut sounds great. Just to be clear, these are modifications to Rover 1, which we've been calling “the trailer.” Rover 2 (the one with your modifications for the trip to Pathfinder) should remain as-is for now.
You'll be taking a chunk out of the roof, just in front of the airlock in the rear of the vehicle. The hole needs to be at least 2.5m long and the full 2m width of the pressure vessel.
Before any cuts, draw the shape on the trailer, and position the trailer where Pathfinder's camera can see it. We'll let you know if you got it right.
[10:43] Watney: Roger. Take a pic at 11:30 if you haven't heard from me by then.
The rovers are made to interlock so one can tow the other. That way you can rescue your crewmates if the shit hits the fan. For that same reason, rovers can share air via hoses you connect between them. That little feature will let me share atmosphere with the trailer on my long drive.
I'd stolen the trailer's battery long ago; it had no ability to move under it's own power. So I hitched it up to my awesomely modified rover and towed it in to place near Pathfinder.
Venkat told me to “draw” the shape I plan to cut, but he neglected to mention how. It's not like I have a Sharpie that can work out on the surface. So I vandalized Martinez's bed.
The cots are basicall
y hammocks. Lightweight string woven loosely into something that's comfortable to sleep on. Every gram counts when making stuff to send to Mars.
I unraveled Martinez's bed and took the string outside. I taped it to the trailer hull along the path I planned to cut. Yes, of course duct tape works in a near-vacuum. Duct tape works anywhere. Duct tape is magic and should be worshiped.
I can see what NASA has in mind. The rear of the trailer has an airlock that we're not going to mess with. The cut is just ahead of it, and will leave plenty of space for The Big Three to stand.
I have no idea how NASA plans to power the Big Three for 24½ hours a day and still have energy left to drive. I bet they don't know, either. But they're smart; they'll work something out.
[11:49] JPL: What we can see of your planned cut looks good. We're assuming the other side is identical. You're cleared to start drilling.
[12:07] Watney: That's what she said.
[12:25] JPL: Seriously, Mark? Seriously?
First, I depressurized the trailer. Call me crazy, but I didn't want the drill explosively launched at my face.
Then I had to pick somewhere to start. I thought it'd be easiest to start on the side. I was wrong.
The roof would have been better. The side was a hassle because I had to hold the drill parallel to the ground. This isn't your dad's Black & Decker we're talking about. It's a meter long and only safe to hold by the handles.
Getting it to bite was nasty. I pressed it against the hull and turned it on, but it wandered all over the place. So I got my trusty hammer and screwdriver. With a few taps, I made a small chip in the carbon composite.
That gave the bit a place to seat, so I could keep drilling in one place. As NASA predicted, it took about two minutes to get all the way through.
I followed the same procedure for the second hole and it went much smoother. After the third hole, the drill's overheat light came on.
It wasn't designed to operate constantly for so long. Fortunately, it sensed the overheat and warned me. So I leaned it against the workbench for a few minutes and it cooled down. One thing you can say about Mars: It's really cold. The thin atmosphere doesn't conduct heat very well, but it cools everything eventually.
I had already removed the drill's cowling (the power cord needed a way in). A pleasant side effect is the drill cools even faster. Though I'll have to clean it thoroughly every few hours as dust accumulates.
By 17:00, when the sun began to set, I had drilled 75 holes. A good start, but there's still tons to do. Eventually (probably tomorrow) I'll have to start drilling holes that I can't reach from the ground. For that I'll need something to stand on.
I can't use my “workbench.” It's got Pathfinder on it, and the last thing I'm going to do is mess with that. But I've got three more MAV landing struts. I'm sure I can make a ramp or something.
Anyway, that's all stuff for tomorrow. Tonight is about eating a full ration for dinner.
Awww yeah. That's right. I'm either getting rescued on Sol 549 or I'm dying. That means I have 35 days of extra food. I can indulge once in a while.
LOG ENTRY: SOL 194
I average a hole every 3.5 minutes. That includes the occasional breather to let the drill cool off.
I learned this by spending all damn day drilling. After 8 hours of dull, physically intense work, I had 137 holes to show for it.
It turned out to be easy to deal with places I couldn't reach. I didn't need to modify a landing strut after all. I just had to get something to stand on. I used a geological sample container (also known as “a box”).
Before I was in contact with NASA, I would have worked more than 8 hours. I can stay out for 10 before even dipping in to “emergency” air. But NASA's got a lot of Nervous Nellies who don't want me out longer than spec.
With today's work, I'm about ¼ of the way through the whole cut. At least, ¼ of the way through the drilling. Then I'll have 759 little chunks to chisel out. And I'm not sure how well carbon composite is going to take to that. But NASA'll do it a thousand times back on Earth and tell me the best way to get it done.
Anyway, at this rate, it'll take 4 more days of (boring-ass) work to finish the drilling.
I've actually exhausted Lewis's supply of shitty '70's TV. And I've read all of Johanssen's mystery books.
I rifled through other crewmates' stuff to find entertainment. But all of Vogel's stuff is in German, Beck brought nothing but medical journals, and Martinez didn't bring anything.
I'm got really bored, so I decided to pick a theme song!
Something appropriate. And naturally, it should be something from Lewis's godawful '70's collection. It wouldn't be right any other way.
There are plenty of great candidates: Life on Mars by David Bowie, Rocket Man by Elton John, Alone Again (Naturally) by Gilbert O'Sullivan.
But I settled on Stayin' Alive by the Bee Gees.
LOG ENTRY: SOL 195
Another day, another bunch of holes. 145 this time (I'm getting better.) I'm half-way done. This is getting really old.
But at least I have encouraging messages from Venkat to cheer me on!
[17:12] Watney: 145 holes today. 357 total.
[17:31] JPL: We thought you'd have more done by now.
Dick.
Anyway, I'm still bored at night. I guess that's a good thing. Nothing's wrong with the Hab, there's a plan to save me, and the physical labor is making me sleep wonderfully.
I miss tending the potatoes. The Hab isn't the same without them.
There's still soil everywhere. No point in lugging it back outside. Lacking anything better to do, I ran some tests on it. Amazingly, some of the bacteria survived. The population is strong and growing. That's pretty impressive, when you consider it was exposed to near-vacuum and sub-arctic temperatures for over 24 hours.
My guess is pockets of ice formed around some of the bacteria, leaving a bubble of survivable pressure inside, and the cold wasn't quite enough to kill them. With hundreds of millions of bacteria, it only takes one survivor to stave off extinction.
Life is amazingly tenacious. They don't want to die anymore than I do.
LOG ENTRY: SOL 196
I fucked up.
I fucked up big time. I made a mistake that might kill me.
I started my EVA around 08:45, same as always. I got my hammer and screwdriver and started chipping the trailer's hull. It's a pain in the ass to make a chip before each drilling, so I make all the day's chips in a single go.
After chipping out 150 divots (hey, I'm an optimist), I got to work.
It was the same as yesterday and the day before. Drill through, relocate. Drill through, relocate. Drill through a third time, then set the drill aside to cool. Repeat that process over and over till lunchtime.
At 12:00, I took a break. Back in the Hab, I enjoyed a nice lunch and played some chess against the computer (it kicked my ass). Then back out for the day's second EVA.
At 13:30 my ruination occurred, though I didn't realize it at the time.
The worst moments in life are heralded by small observations. The tiny lump on your side that wasn't there before. Coming home to your wife and seeing two wine glasses in the sink. Any time you hear “We interrupt this program...”
For me, it was when the drill didn't start.
Only three minutes earlier, it was working fine. I had finished a hole and set the drill aside to cool. Same as always.
But when I tried to get back to work, it didn't work. The power light wouldn't even come on.
I wasn't worried. If all else failed, I had another drill. It would take a few hours to wire it up, but that's hardly a concern.
The power light being off meant there was probably something wrong with the line. A quick glance at the airlock window showed the lights were on in the Hab. So there were no systemic power problems. I checked my new breakers and sure enough, all three had tripped.
I guess the drill pulled a little too much amperage. No big deal. I reset the breakers an
d got back to work. The drill fired right up, and I was back to making holes.
Doesn't seem like a big deal, right? I certainly didn't think so at the time.
I finished my day at 17:00 after drilling 131 holes. Not as good as yesterday, but I lost some time to the drill malfunction.
I reported my progress.
[17:08] Watney: 131 holes today. 488 total. Minor drill issue; it tripped the breakers. There may be an intermittent short in the drill, probably in the attachment point of the power line. Might need to redo it.
Earth an Mars are just over 18 light-minutes apart now. Usually, NASA responded within 25 minutes. But this time, no reply came. Remember, I do all my communication from Rover 2, which relays everything through Pathfinder. I can't just lounge in the Hab awaiting a reply; I have to stay in the rover until they acknowledge the message.
[17:38] Watney: Have received no reply. Last message sent 30 minutes ago. Please acknowledge.
I waited another 30 minutes. Still no reply. Fear started to take root.
Back when JPL's Nerd Brigade hacked the rover and Pathfinder to be an poor-man's IM client, they sent me a cheat sheet for troubleshooting. I executed the first instruction:
