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فصل 22

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Chapter 22


Mawrth Valis! I’m finaly here!

Actualy, it’s not an impressive accomplishment. I’ve only been traveling 10 sols. But it’s a good psychological milestone.

So far, the rover and my ghetto life support are working admirably. At least, as wel as can be expected for equipment being used ten

times longer than intended.

Today is my second Air Day (the first was 5 sols ago). When I put this scheme together, I figured Air Days would be godawful boring.

But now I look forward to them. They’re my days off.

On a normal day I get up, fold up the bedroom, stack the solar cels, drive four hours, set up the solar cels, unfurl the bedroom, check

al my equipment (especialy the rover chassis and wheels), then make a Morse Code status report for NASA if I can find enough nearby


On an Air Day, I wake up and turn on the Oxygenator. The solar panels are already out from the day before. Everything’s ready to go.

Then I chil out in the bedroom or rover. I have the whole day to myself. The bedroom gives me enough space that I don’t feel cooped up,

and the computer has plenty of sh@tty TV reruns for me to enjoy.

Technicaly, I entered Mawrth Valis yesterday. But I only knew that by looking at a map. The entrance to the valey is wide enough

that I couldn’t see the canyon wals in either direction.

But now I’m definitely in a canyon. And the bottom is nice and flat. Exactly what I was hoping for. It’s amazing; this valey wasn’t made by a river slowly carving it away. It was made by a mega-flood in a single day. It would have been a hel of a thing to see.

Weird thought: I’m not in Acidalia Planitia any more. I spent 457 sols there, almost a year and a half, and I’l never go back. I wonder if I’l be nostalgic about that later in life.

If there is a “later in life,” I’l be happy to endure a little nostalgia in return. But for now I just want to go home.

“Welcome back to CNN’s Mark Watney Report,” Cathy said to the camera. “We’re speaking with our frequent guest, Dr. Venkat

Kapoor. Dr. Kapoor, I guess what people want to know is: Is Mark Watney doomed?”

“We hope not,” Venkat responded. “But he’s got a real chalenge ahead of him.”

“According to your latest satelite data, the dust storm in Arabia Terra isn’t abating at al, and wil block 80% of the sunlight?”

“That’s correct.”

“And can Watney’s only source of energy is his solar panels, correct?”

“Yes, that’s right.”

“Can his makeshift rover operate at 20% power?”

“We haven’t found any way to make that happen, no. His life support alone takes more energy than that.”

“How long until he enters the Tau Event.”

“He’s just entered Mawrth Valis now. At his current rate of travel, he’l be at the edge of the Tau Event on Sol 471. That’s 12 days

from now.”

“Surely he’l see something is wrong,” Cathy said. “With such low visibility, it won’t take long for him to realize his solar cels wil have a problem. Couldn’t he just turn around at that point?”

“Unfortunately, everything’s working against him,” Venkat said. “The edge of the storm isn’t a magic line. It’s just an area where the dust gets a little more dense. It’l keep getting more and more dense as he travels onward. It’l be realy subtle; every day wil be slightly darker than the last. Too subtle to notice.”

Venkat sighed. “He’l go hundreds of kilometers, wondering why his solar panel efficiency is going down, before he’s notices any

visibility problems. And the storm is moving west as he moves east. He’l be too deep in to get out.”

“Are we just watching a tragedy play out?” Cathy asked.

“There’s always hope,” Venkat said. “Maybe he’l figure it out faster than we think and turn around in time. Maybe the storm wil

dissipate unexpectedly. Maybe he’l find a way to keep his life support going on less energy than we thought was possible. Mark Watney is now an expert at surviving on Mars. If anyone can do it, it’s him.”

“Twelve days,” Cathy said to the camera. “Al of Earth is watching, but powerless to help.”


Another uneventful sol. Tomorrow is an Air Day, so this is kind of my Friday night.

I’m about half-way through Mawrth Valis now. Just as I’d hoped, the going has been easy. No major elevation changes. Hardly any

obstacles. Just smooth sand with rocks smaler than half a meter.

You may be wondering how I navigate. When I went to Pathfinder, I watched Phobos transit the sky to figure out the east-west axis.

But Pathfinder was an easy trip compared to this, and I did it mostly with landmarks.

I can’t get away with that this time. My “map” (such as it is) consists of satelite images far too low-resolution to be of any use. They just never expected me to be out this far. The only reason I had high-res images of the Pathfinder region is because they were included for landing purposes; in case Martinez had to land way long of our target.

So this time around, I needed a reliable way to fix my position on Mars.

Latitude and Longitude. That’s the key. The first is easy. Ancient sailors on Earth figured that one out right away. Earth’s 23.5 degree axis points at Polaris. Mars has a tilt of just over 25 degrees, so it’s pointed at Deneb.

Making a s@xtant isn’t hard. Al you need is a tube to look through, a string, a weight, and something with degree markings. I made it in under an hour.

So I go out every night with a home-made s@xtant and sight Deneb. It’s kind of sily if you think about it. I’m in my space suit on Mars

and I’m navigating with 16th century tools. But hey, they work.

Longitude is a different matter. On Earth, the earliest way to work out longitude required them to know the exact time, then compare it

to the sun’s position in the sky. The hard part for them back then was inventing a clock that would work on a boat (pendulums don’t work on boats). Al the top scientific minds of the age worked on the problem.

Fortunately, I have accurate clocks. There are four computers in my immediate line of sight right now. And I have Phobos.

Because Phobos is ridiculously close to Mars, it orbits the planet in less than one Martian day. So it travels west to east (unlike the sun and Deimos) and sets every 11 hours. And naturaly, it moves in a very predictable pattern.

I spend 13 hours every sol just sitting around while the solar panels charge the batteries. Phobos is guaranteed to set at least once

during that time. I note the time when it does. Then I plug it in to a nasty formula I worked out and I know my longitude.

So, working out longitude requires Phobos to set, and working out latitude requires it to be night so I can sight Deneb. It’s not a very fast system. But I only need it once a day. I work out my location when I’m parked, and account for it in the next day’s travel. It’s kind of a successive approximation thing. So far, it’s been working.

Mindy Park zoomed in on the latest satelite photo with practiced ease. Watney’s encampment was visible in the center, the solar cels

laid out in a circular pattern as was his habit.

The bedroom was inflated. Checking the timestamp on the image, it was from noon local time. She quickly found the status report;

Watney always placed it close to the rover when rocks were in abundance, usualy to the north.

To save time, Mindy had taught herself Morse Code so she wouldn’t have to look each letter up every morning. Opening an email, she

addressed it to the ever-growing list of people who wanted Watney’s daily status message.


She frowned and added “Note: 5 sols until Tau Event entry.”


Mawrth Valis was fun while it lasted. I’m in Arabia Terra now.

I just entered the edge of it, if my latitude and longitude calculations are correct. But even without the math, it’s pretty obvious the terrain is changing.

For the last two sols, I’ve spent almost al my time on an incline, working my way up the back wal of Mawrth Valis. It was a gentle

rise, but a constant one. I’m at a much higher altitude now. Adicalia Planitia (where the lonely Hab is hanging out) is 3000m below elevation zero, and Arabia Terra is 500m below. So I’ve gone up two and a half kilometers.

Want to know what’s at elevation zero? On Earth, it’s sea level. Obviously, that won’t work on Mars. So lab-coated geeks got together

and decided Mars’s elevation zero is wherever the air pressure is 610.5 Pascals. That’s about 500 meters up from where I am right now.

Now things get tricky. In Acidalia Planitia, if I got off-course, I could just point in the right direction based on new data. Later, in Mawrth Valis, it was impossible to fu@k it up. I just had to folow the canyon.

Now I’m in a rougher neighborhood. The kind of neighborhood where you keep your rover doors locked, and never come to a

complete stop at intersections. Wel, not realy, but it’s bad to get off-course here.

Arabia Terra has large, brutal craters that I have to drive around. If I navigate poorly, I’l end up at the edge of one. I can’t just drive down one side and up the other. Rising in elevation costs a ton of energy. On flat ground, I can make 90km per day. On a steep slope, I’d be lucky to get 40km. Plus, driving on a slope is dangerous. One mistake and I could rol the rover. I don’t even want to think about that.

Yes, I’l eventualy have to drive down in to Schiapareli. No way around that. I’l have to be realy careful.

Anyway, if I end up at the edge of a crater I’l have to backtrack to somewhere useful. And it’s a damn maze of craters out here. I’l

have to be on my guard; observant at al times. I’l need to navigate with landmarks as wel as latitude and longitude.

My first chalenge is to pass between the craters Rutherford and Trouvelot. It shouldn’t be too hard. They’re 100km apart. Even I can’t

fu@k that up, right?



I managed to thread the needle between Rutherford and Trouvelot nicely. Admittedly, the needle was a 100km wide, but hey.

I’m now enjoying my fourth Air Day of the trip. I’ve been on the road for 20 sols. So far, I’m right on schedule. According to my maps,

I’ve traveled 1,440km. Not quite halfway there, but almost.

I’ve been gathering soil and rock samples from each place I camp. I did the same thing on my way to Pathfinder. But this time, I know

NASA’s watching me. So I’m labeling each sample by the current sol. They’l know my location a hel of a lot more accurately than I do.

They can correlate the samples with their locations later.

It might be a wasted effort. The MAV isn’t going to have much weight alowance when I launch. To intercept Hermes, it’l have to reach

escape velocity, but it was only designed to get to orbit. The only way to get it going fast enough is to lose a lot of weight.

At least that jury-rigging wil be NASA’s job to work out, not mine. Once I get to the MAV, I’l be back in contact with them and they

can tel me what modifications to make.

They’l probably say “Thanks for gathering samples. But leave them behind. And one of your arms, too. Whichever one you like least.”

But on the off-chance I can bring them, I’m gathering them.

The next few days travel should be easy. The next major obstacle is Marth Crater. It’s right in my straight-line path toward Schiapareli.

It’l cost me a hundred kilometers or so to go around, but it can’t be helped. I’l try to aim for the southern edge. The closer I get to the rim the less time I waste going around it.

“Did you read today’s updates?” Lewis asked, puling her meal from the microwave.

“Yeah,” Martinez said, sipping his drink.

She sat across the Rec table from him. Carefuly opening the steaming package, she let it cool for a moment before eating. “Mark

entered the dust storm yesterday.”

“Yeah, I saw that,” he said.

“We need to face the possibility that he won’t make it to Schiapareli,” Lewis said. “If that happens, we need to keep morale up. We

stil have a long way to go before we get home.”

“He was dead before,” Martinez said. “It was rough on morale, but we soldiered on. Besides, he won’t die.”

“It’s pretty bleak, Rick,” Lewis said. “He’s already 50km in to the storm, and he’l go another 90km per sol. He’l get in too deep to

recover soon.”

Martinez shook his head. “He’l pul through, Commander. Have faith.”

She smiled forlornly. “Rick, you know I’m not religious.”

“I know,” he said. “I’m not talking about faith in God, I’m talking about faith in Mark Watney. Look at al the sh@t Mars has thrown at

him, and he’s stil alive. He’l survive this. I don’t know how, but he wil. He’s a clever son-of-a-bit@h.”

Lewis took a bite of her food. “I hope you’re right.”

“Want to bet $100?” Martinez said with a smile.

“Of course not,” Lewis said.

“Damn right,” he smiled.

“I’d never bet on a crewmate dying,” Lewis said. “But that doesn’t mean I think he’l-”

“Blah blah blah,” Martinez interrupted. “Deep down, you think he’l make it.”


My fifth Air Day, and things are going wel. I should be skimming south of Marth Crater tomorrow. It’l get easier after that.

I’m in the middle of a bunch of craters that form a triangle. I’m caling it the Watney Triangle because after what I’ve been through, sh@t on Mars should be named after me.

Trouvelot, Becquerel, and Marth form the points of the triangle, with 5 other major craters along the sides. Normaly this wouldn’t be a

problem at al, but with my extremely rough navigation, I could easily end up at the lip of one of them and have to backtrack.

After Marth, I’l be out of the Watney Triangle (yeah, I’m liking that name more and more). Then I can beeline toward Schiapareli with

impunity. There’l stil be plenty of craters in the way, but they’re comparatively smal and going around them won’t cost much time.

Progress has been great. Arabia Terra is certainly rockier than Acidalia Planitia, but nowhere near as bad as I’d feared. I’ve been able to drive over most of the rocks, and around the ones that are too big.

I have 1435km left to go. Ares 4’s MAV is in the southwest part of Schiapareli. The primary goal of Ares 4 is to get a look at the

long-term effects of Martian weather on deep layers of strata exposed by the crater.

At least, that was the original plan. I’l be taking their MAV and Commander Lewis hasn’t given Hermes back, so we’ve ruined

everything. They’l probably just send another MAV and wait for the next window.

I did some research on Schiapareli and found some good news. The best way in is right in my direct-line path. I won’t have to drive the

perimeter at al. And the way in is easy to find, even when you suck at navigating. The northwest rim has a smaler crater on it, and that’s the landmark I’l be looking for. To the southwest of that little crater is a gentle slope in to Schiapareli Basin.

The little crater doesn’t have a name. At least, not on the maps I have. So I dub it “Entrance Crater.” Because I can.

In other news, my equipment is starting to show signs of age. Not surprising, considering it’s way the hel past its expiration date. For the past two sols, the batteries have taken longer to recharge. The solar cels just aren’t producing as much wattage as before. It’s not a big deal, I just need to charge a little longer.


Wel, I fu@ked it up.

It was bound to happen eventualy. I navigated badly and ended up at the ridge of Marth Crater. With it being 100km wide, I can’t see

the whole thing, so I don’t know where on the circle I am.

The ridge runs perpendicular to the direction I was going. So I have no clue which way I should go. And I don’t want to take the long

way around if I can avoid it. Originaly I wanted to go around to the south, but north is just as likely to be the best path now that I’m off-course.

I’l have to wait for another Phobos transit to get my longitude, and I’l need to wait for nightfal to sight Deneb for my latitude. So I’m done driving for the day. I’d made 70km out of the 90km I usualy do. So it’s not too much wasted potential driving.

Marth isn’t too steep. I could probably just drive down one side and up the other. It’s big enough that I’d end up camping inside it one night. But I don’t want to take unnecessary risks. Slopes are bad and should be avoided. I gave myself plenty of buffer time, so I’m going to play it safe.

I’m ending today’s drive early and setting up for recharge. Probably a good idea anyway with the solar cels acting up; it’l give them

more time to work. They underperformed again last night. I checked al the connections and made sure there wasn’t any dust on them, but

they stil just aren’t 100%.


I’m in trouble.

I watched two Phobos transits yesterday and sighted Deneb last night. I worked out my location as accurately as I could, and it wasn’t

what I wanted to see. As far as I can tel, I hit Marth Crater dead-on.


This is the worst case scenario. I can go north or south, and they’l be about the same. It’l cost at least a day to correct. Al because I aimed wrong yesterday.

That’s frustrating, but it’s not why I’m in trouble.

I stil wanted to be efficient, and I wasn’t 100% sure where I was. So I took a little walk this morning. It was over a kilometer to the

peak of the rim. That’s the sort of walk people do on Earth without thinking twice, but in an EVA suit it’s an ordeal.

I can’t wait til I have grandchildren. “When I was younger, I had to walk to the rim of a crater. Uphil! In an EVA suit! On Mars, ya

little sh@t! Ya hear me? Mars!”

Anyway, I got up to the rim and damn, it’s a beautiful sight. From my high vantage point, I got a stunning panorama. I figured I might be able to see the far side of Marth Crater, and maybe work out if north or south was the best way around it.

But I couldn’t see the far side. There was a haze in the air. It’s not uncommon; Mars has weather and wind and dust, after al. But it

seemed hazier than it should. I’m accustomed to the wide-open expanses of Acidalia Planitia, my former prairie home.

Then it got weirder. I turned around and looked back toward the rover and trailer. Everything was where I’d left it (very few car thieves on Mars). But the view seemed a lot clearer.

I looked east across Marth again. Then west to the horizon. Then east, then west. Each turn required me to rotate my whole body,

EVA suits being what they are.

Yesterday, I passed a crater. It’s about 50km west of here. It’s just visible on the horizon. But looking east, I can’t see anywhere near that far. Marth Crater is 110km wide. With a visibility of 50km, I should at least be able to see a distinct curvature of the rim. But I can’t.

The fu@k?

At first, I didn’t know what to make of it. But the lack of symmetry bothered me. And I’ve learned to be suspicious of everything.

That’s when a bunch of stuff started to dawn on me:

1) The only explanation for asymmetrical visibility is a dust storm.

2) Dust storms reduce the effectiveness of solar cels.

3) My solar cels have been slowly losing effectiveness for several sols.

From this, I concluded the folowing:

1) I’ve been in a dust storm for several sols.

2) sh@t.

Not only am I in a dust storm, but it gets thicker as I approach Schiapareli. A few hours ago, I was worried because I had to go

around Marth Crater. Now I’m going to have to go around something a fu@kload bigger.

And I have to hustle. Dust storms move. Sitting stil means I’l likely get overwhelmed. But which way do I go? It’s no longer an issue of trying to be efficient. If I go the wrong way this time, I’l eat dust and die.

I don’t have satelite imagery. I have no way of knowing the size or shape of the storm, or its heading. Man, I’d give anything for a 5-

minute conversation with NASA. Now that I think of it, NASA must be sh@tting bricks watching this play out.

I’m on the clock. I have to figure out how to figure out what I need to know about the storm. And I have to do it now.

And right this second nothing comes to mind.

Mindy trudged to her computer. Today’s shift began at 2:10pm. Her schedule matched Watney’s every day. She slept when he slept.

Watney simply slept at night on Mars, while Mindy had to drift 40 minutes forward every day, taping aluminum foil to her windows to get

any sleep at al.

She brought up the most recent satelite images. She cocked an eyebrow. He had not broken camp yet. Usualy he drove in the early

morning, as soon as it was light enough to navigate. Then he capitalized on the midday sun to maximize recharging.

But today, he had not moved, and it was wel past morning.

She checked around the rovers and bedroom for a message. She found it in the usual place (north of the campsite). Reading the Morse

code, her eyes widened.


Fumbling with her cel phone, she dialed Venkat’s personal number.

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