13 Minutes to the Moon: 11. The 13 minutes
Nasa archive audio of the astronauts’ dramatic 13 minutes to the Moon, as heard by mission control. All of Neil Armstrong and Buzz Aldrin’s tense moments as they make space history. The recording captures the intense pressure and technical challenges during the landing, including low fuel and communication dropouts.
This is Nasa’s archive recording of Capcom Charlie Duke’s communications loop from 20 July 1969.
#13MinutestotheMoon
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Transcript
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Speaker 4 The audio recordings of the conversations between Mission Control and the Apollo 11 astronauts are instantly recognizable whenever you hear them.
Speaker 4 Unmistakable as anything else other than a crew hurtling towards the moon, being guided by their mission control team across the void of space.
Speaker 4 Those voices and sounds are so familiar and yet nearly impossible to decipher without a lot of help.
Speaker 4 But now you know exactly what you're hearing. Here's a chance to listen again to history as it happened.
Speaker 4 I'm Kevin Fong from the BBC World Service. This is 13 Minutes to the Moon.
Speaker 4 There were many communication channels in Mission Control and what you're about to hear is Capcom Charlie Dukes Loop.
Speaker 4 This is the final 13 minutes of Descent to the Moon on July the 20th, 1969, exactly as he heard it that day.
Speaker 4 Episode 11, the 13 minutes.
Speaker 5 Roger ten percent.
Speaker 5 Let's wait till we get to that rally.
Speaker 5 Let's wait till we get
Speaker 5 We love you, Houston. We'd love to tell them to go ahead and over.
Speaker 5 Flight batteries lost this men. Just lost your men.
Speaker 5
Turn on with 20-foot-per-second residual as part of due to downtrack air. I'll leave it blue.
Relay to it. 20-foot residual due to downtrend error.
Speaker 5
Eagle, we got you now. He's looking good over.
Roger, GTC, go. Flight control, we're go.
FGP looks good. Roger.
Speaker 5 Eagle.
Speaker 5 Eagles, Houston, everything's looking good here over.
Speaker 5 Roger, copy.
Speaker 5 Eagle Houston, after y'all round angles S-band pitch minus 9er yaw plus 18
Speaker 5 Flight Spider we have negative misfin Roger negative misfit
Speaker 5 you got the agree
Speaker 5 Flatto what data do you have things and ags end off the flight Roger
Speaker 5 restarting misfin now Roger's a doffway looking looks good flight Roger Ags and things agree very closely
Speaker 5 Roger dips thrust 9820 rod thrust nine eight two zero copy flight
Speaker 5 there just on the how you looking guys
Speaker 5 per second
Speaker 5 go go
Speaker 5 no change is what you're saying no change that's downtrack and noise rod
Speaker 5 flight photo go fight reinitialize the filter we do have an altitude difference roge
Speaker 5 Light sider, GTC
Speaker 5 getting a little clutcher.
Speaker 5 A
Speaker 5 voltage now.
Speaker 5 Roger.
Speaker 5 50 meter, maybe, huh?
Speaker 5
Stand by. That's looking good to us.
You're still looking good at three coming up three minutes.
Speaker 5 Okay, control, Let me know when he starts his yacht here. Roger.
Speaker 5 How's your miss been looking now, Fidel? Flight, Fighter.
Speaker 5 We're done. Okay, how about you guys?
Speaker 5 We're gonna make it another big
Speaker 5 down range, so it'll be a little long.
Speaker 5 Roger, copy.
Speaker 5
Thanks, Alex. Long down range.
That's right. I think we're first.
We can firm that, Fogg.
Speaker 5 Well, flight
Speaker 5
Make your Goda goes based on the data you had for an LOS. I see we got it back in another few seconds.
Really occupying. Okay, retro, go.
Fight him. Go, guys.
Go. Control.
Go. Health count.
Go.
Speaker 5
Gen C, go. Economy.
Search it. Go.
Compound. We're going to go to continue PDI.
Speaker 5 Eagles, Houston. You're a go to continue.
Speaker 5 Did you get that button?
Speaker 5
You're a go to continue. You're a go to continue power descent.
You're a go to continue power descent.
Speaker 5 Okay, everybody, let's take back home for the line radar.
Speaker 4 What guns? Okay.
Speaker 4
We got a little rate test. And he's Houston.
We got data dropped out. You're still looking good.
Speaker 5 On the pins. Raj, I copy, guys.
Speaker 5
Okay, we got data back. Radar flight looks good.
Raj, 2,000 feet. Raj, 2,000 feet del H.
Speaker 5 Me no one he accepts it, guidance. How are these lights out?
Speaker 5 LH is minus 2,900.
Speaker 5 Roger, we copy. That's the Earth right out our front window.
Speaker 5 Here's an you looking at our delta H.
Speaker 5 Looking good to us. Are we accepting it, guidance?
Speaker 5 1202, stand by. 1202.
Speaker 5 Looks like it's converging.
Speaker 5 1202 alarm.
Speaker 5
Yeah, same thing we had. Flight, retro.
Go, retro. Throttle down.
6 plus 25.
Speaker 5
We're going that flight. We're going that alarm.
Roger, we got you. We're going that alarm
Speaker 5
where we go. He's taking it off to H now.
Roger.
Speaker 5 Cognitive, 330. Did you get a 6 plus 25 throttle down? 6 plus 25 throttle down.
Speaker 5 Flight 50 control.
Speaker 5 Flight control, we have velocity. Roger.
Speaker 5 Same alarm, and it appears to come up when we have a 1668 up.
Speaker 5
Roger, copy. Okay, we'll monitor his delta H flight.
Roger. I think that's what it's getting.
Okay. Eagles Houston will monitor your delta H.
Speaker 5
Roger. Delta H is beautiful.
Delta H is looking looking good, huh? Roger, Delta H is looking good to us. Okay, all flight controllers hang tight.
Should be throttling down pretty shortly.
Speaker 5 Put him in the simulator. Roger.
Speaker 5 How's it looking, guys?
Speaker 5 Acts and things look real close.
Speaker 5 You want him to stay out of 68? Uh, negative flight, I just said we'll months have been on us.
Speaker 5 Okay.
Speaker 5
Okay. Fly controller.
Looking looks good. Flight Rods.
Go, guys. So 968 now, well may be the problem here, and we can monitor Delta H.
Roger.
Speaker 5
Flight fighter looking real good. Roger Fido, good.
At seven minutes, you're looking great to us, Eagle.
Speaker 5
Tell Com how you look at it. Okay, I'm still out of the flu, Roger.
So we may tend to lose as we gradually pitch over. Let me try auto again now, see what happens.
Gonna try sterbo again, Don.
Speaker 5
Tell people. Okay, looks like you told them.
Roger, we got good data.
Speaker 5 We on sterile done.
Speaker 1 That's a party flight, and it's holding in there pretty good. Rog.
Speaker 1
Everybody, hang tight seven and a half minutes. Flight gun just landing radars.
Fixed the velocity is beautiful. Roger flight control, desent to fuel.
Speaker 1 Descent two fuel correct. Descent to fuel only.
Speaker 1 Too critical.
Speaker 1 He didn't want to say critical. Roger.
Speaker 5 Descent two fuel. Eagle Houston is descent to fuel to monitor over.
Speaker 5 32.
Speaker 5 Flight Fido looking real good. Roger.
Speaker 5 Give us an estimated switchover time, please.
Speaker 5
Roger, stand by. You're looking great at eight minutes.
You got an estimated, what's our T go guidance?
Speaker 5 30 seconds to P64. Roger,
Speaker 5 so you got 30 seconds to P64. Okay, we've still got landing radar guidance.
Speaker 5 Okay. Is it converged?
Speaker 5 Has it converged? Yes. Okay.
Speaker 5 Flight Fido, we're going to look real good. Roger, Fido.
Speaker 5 Eagle Houston coming up 830, you're looking great.
Speaker 5 Okay, they got
Speaker 5 Tigo's good. Rog, Tigo's go.
Speaker 5
We have position two on the LR. Rog, position two, all flight controllers, 20 seconds to go.
No, go for landing. Eagle, you're looking great.
Coming up nine minutes.
Speaker 5
Okay, all-flight controllers gonna go for landing. Retro.
Go.
Speaker 5
Go. Guidance.
Go. Control.
Speaker 5
Telcom. Call.
Gen C. Go.
Roger County, Surgeon. Go.
Capcom, we're go for landing. Eagle, Houston, you're go for landing.
Over.
Speaker 5 Sergeant Unitan, go for landing, 3,000 feet.
Speaker 5
1201. 1201.
Roger, 1201 alarm. 1201 alarm along.
Same type, we're go, flight. We're go, same type.
We're go.
Speaker 5 Flight set of right.
Speaker 5
Roger. 2,000 feet.
Into the egg, 47 degrees. Roger.
Speaker 5 47 degrees. How's our margin looking, Bob?
Speaker 5
He looks okay. We've got four and a half.
Roger. Eagle looking great.
You're go.
Speaker 5 How much 20 eggs? Looks good. Roger.
Speaker 5 Roger 1202, we copy it.
Speaker 5 How are you doing? 35 degrees. We look good here, five.
Speaker 5 700 feet, 21 down, 33 degrees.
Speaker 5 100 feet down at 19.
Speaker 5 540 feet down at 30 and at 15.
Speaker 5 Attitude hold. Okay, I hold.
Speaker 5
I think we better be quiet. 400 feet down at nine.
Okay, the only call-outs from now on will be.
Speaker 5 350 feet down at 4.
Speaker 5 3.5 down.
Speaker 5 You're
Speaker 5 banked on
Speaker 5 horizontal velocity.
Speaker 5 300 feet down, 3.5. 47 forward.
Speaker 5 Hold up.
Speaker 5 One a minute. 1 and a half down.
Speaker 5 70.
Speaker 5 Got this shadow out there.
Speaker 5 50 down and 2.5.
Speaker 5 19 forward.
Speaker 5 Okay, Bob. I'll be doing Bob.
Speaker 5 3 12 down. 220 feet.
Speaker 5 13 forward.
Speaker 5
11 forward coming down nicely. 200 feet.
4.5 down. 5.5 down.
Speaker 5 160, 6.5 down. 5.5 down.
Speaker 5 9 forward.
Speaker 5 Low level?
Speaker 5 Good.
Speaker 5 120 feet.
Speaker 5 100 feet, 3.5 down. 9 forward.
Speaker 5 5%.
Speaker 5 100 bite.
Speaker 5 875 feet that are looking good down a half
Speaker 5 forward 60 60 seconds
Speaker 5 60 seconds
Speaker 5 lights on
Speaker 5 down two and a half
Speaker 5 forward
Speaker 5 forward
Speaker 5 40 feet down two and a half picking up some dust
Speaker 5 30 feet two and a a half down. Fake shadow.
Speaker 5 Half forward.
Speaker 5 Four forward, drifting to the right a little.
Speaker 5
30. 30 seconds.
30 seconds.
Speaker 5 Contact light.
Speaker 5 Okay, engine stop. APA at a decent.
Speaker 5 Host control both auto decent engine command override off.
Speaker 5 Engine arm off.
Speaker 5 413 is in.
Speaker 5 We've had shutdown. We copy it down, Eagle.
Speaker 5 Everybody, T1. Stand by for T1.
Speaker 5 Tranquility Base here. The Eagle has landed.
Speaker 4 Thank you to NASA for the recording of Space Exploration's most extraordinary 13 minutes.
Speaker 4 Apollo 11's landing was the goal set by President John F. Kennedy eight years before.
Speaker 4 His celebrated We Choose to Go to the Moon speech in 1962 was given at Rice University in Houston, Texas. And that's where we've recorded the live season finale of 13 Minutes to the Moon.
Speaker 4 With an audience at the University's Baker Institute, I'll be joined by three Apollo veterans you've already met in the series.
Speaker 4 Flight controller John Aaron, Flight Director Jerry Griffin and Apollo 7 astronaut Walt Cunningham.
Speaker 4 And alongside them will be an astronaut from this generation, Peggy Whitson, the first female commander of the International Space Station who has spent more time in space than any other American astronaut.
Speaker 4 And we'll be releasing that 12th episode on the 20th of July 2019, 50 years to the day since it happened, the anniversary of the first moon landing.
Speaker 4 13 Minutes to the Moon is an original podcast from the BBC World Service. I'm Kevin Fong.
Speaker 4 Thank you for listening.
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