The first words spoken on the Moon

Just for the record. . .

From the Apollo Lunar Surface Journal at with some technical commentary omitted to shorten the post. Get all the fun techie details at the link listed above. Time stamps are MET – mission elapsed time, or (most of the time) the hours:minutes:seconds since liftoff.

102:45:40 Aldrin: Contact Light.

[At least one of the probes hanging from three of the footpads has touched the surface. Each of them is 67 inches (1.73 meters) long. The ladder strut doesn’t have a probe. Buzz made the call at 20:17:40 GMT/UTC on 20 July 1969.]

. . .

102:45:43 Armstrong (onboard): Shutdown

102:45:44 Aldrin: Okay. Engine Stop.

[Neil had planned to shut the engine down when the contact light came on, but didn’t manage to do it.]

. . .

102:45:45 Aldrin: ACA out of Detent.

102:45:46 Armstrong: Out of Detent. Auto.

102:45:47 Aldrin: Mode Control, both Auto. Descent Engine Command Override, Off. Engine Arm, Off. 413 is in.

102:45:57 Duke: (Reporting that Houston has received telemetry confirming engine shutdown and that they have heard Buzz’s transmission regarding address 413) We copy you down, Eagle.

102:45:58 Armstrong (onboard): Engine arm is off. (Pause) (Now on voice-activated comm) Houston, Tranquility Base here. The Eagle has landed.

102:46:06 Duke: (Responding to Neil’s transmission but momentarily tongue-tied) Roger, Twan…(correcting himself) Tranquility. We copy you on the ground. You got a bunch of guys about to turn blue. We’re breathing again. Thanks a lot.

102:46:16 Aldrin: Thank you.

[It is easy to understand how Charlie got momentarily tongue-tied when Neil reported the landing. There was not only the excitement and thrill of what they had all just achieved; but, also, after the intense concentration of the last few minutes, the sudden change in call sign from “Eagle” to “Tranquility”.]

Bob- also, Neil never used the ‘Tranquility Base’ call sign in any of the simulations, so Charlie was surprised to hear it.

102:46:18 Duke: You’re looking good here.

102:46:23 Armstrong: Okay. (To Buzz) Let’s get on with it. (To Houston) Okay. We’re going to be busy for a minute.

[They will now prepare for immediate lift-off, in case, as an example, they have damaged an ascent fuel tank in the landing.]

[Aldrin – “Yeah, there are things that should happen.”]

[Armstrong – “Crisp(ly).”]

[Aldrin – “Yeah, ‘Crisp’ is a good word. Because there are discrete abort times that you try to adhere to if you see something leaking, something going wrong.”]

[Armstrong “Like, perhaps, if one footpad starts to sink into the surface and you’re losing stability. Or you have a propellant tank pressure problem, or something that would cause us to go quickly.”]

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