Spacelog Apollo 11

Okay.

My guess would be the telescope's probably pretty useless, but you can differentiate in the sextant between water droplets and stars by the difference in their motions.

Okay, Mike. I guess that we've still got—what you are saying is that we've still got a lot of water droplets visible, but you can pick them out and distinguish them in the sextant, then.

Right. I think so. Buzz is looking through it now. Just a second.

Houston, Apollo 11. It looks like at this time the sextant would be quite usable for any alignment. There's actually very few … verticals.

Roger, Buzz. How about the telescope? Is it useful now?

Well, it's not quite as useful; it never seems to be. Depending on the position of the Sun, it's got that band that seems to go across the center. I don't think it's because of the waste water particles that it would lack its effectiveness. Over.

Roger. What—Is this band something that's deposited on the outside of the optics? Over.

No. I see the reflection from the Sun.

Roger.

The Sun bounces off the LM structure. With the LM attached, that telescope is just about useless. Those star charts that MPAD provided us, I think, would be most useful if we had to use the—if for some reason we had to mark through the telescope. We could use those as a guide for what we're looking at and say, “Well, that bright blob over there has got to be that star because that's the position we're in.” But so far, we've not been able to pick out any decent star patterns while docked with the LM using the telescope.

Houston, Apollo 11.

Houston, Apollo 11. Over.

Go ahead, Apollo 11.

Apollo 11, this is Houston. Go ahead —

— How do your read? Over.

Roger. We're reading you loud and clear.

Roger. You're coming back a little scratchy. It,looks like our O₂ flow transducer's gotten a good bit worse. I just looked at it at the last water accumulator cycling, and it just barely registered—barely crept up above 0.2. Over.

Roger.

11, this is Houston. At the time of your cyclic accumulator stroking, we were on low-bit-rate data, and consequently not receiving the O₂ flow parameter. We expect that what you're seeing is probably nominal. That is, it's probably what we would expect from a transducer that's malfunctioning probably in this fashion, and it's just going to keep on getting worse like that. Nothing to worry about. We'll monitor things on the ground here. Over.

Okay. It does look like it's gradually degrading to about zilch.

Apollo 11 CDR, this is Houston. Radio check. Over.

Roger, Houston. CDR. Loud and clear.

Roger. We're reading you the same. Out.

And would you check with FAO and see where that errata sheet is? We haven't been able to locate that.

Roger. I understand it's supposed to be the back page in Buzz's operational checklist.

Apollo 11, this is Houston. Did you find it? Over.

Roger. We found it.

Roger. And I see you're in P00. If you can give us ACCEPT, we'll uplink a new state vector to you and update the CMC clock. Over.

Okay. You've got it.

11, this is Houston. We're through with the uplink. You can go back to BLOCK.

Apollo 11, this is Houston. We would like to terminate the charge on battery B at GET of 51 30. Over.

Apollo 11, this is Houston. We would like to terminate charging battery Bravo at 51 30 GET. Over.

Roger. Terminate charging battery Bravo 51 30.

11, this is Houston. We show you terminating battery B charge. Over.

Apollo 11, this is Houston. Over

Go ahead, Houston. Apollo 11.

Roger, 11. We show you terminating battery B charge at about 51 hours 30 minutes. Over.

Okay.

Houston, Apollo 11. Would you like to have both oxygen and hydrogen purge on? Over.

11, this is Houston. Say again. Both what on? Over.

On the fuel cell purge: would you like to see both oxygen and hydrogen? Over.