@benjamminbrown:
No.
If Marineford and Enies Lobby are only 100 km apart, then you need to travel 200km/h to get there in half an hour.
What does Marineford being about 450km from the Redline have anything to do with the time it takes to travel between the government institutions?
Because that was the original point in the chapter discussion. Marineford is stated to be situated pretty much directly next to Mariejois, albeit not being on the Red Line itself, but the Marine HQ is as close as it can get - NOT 450km AWAY! You should be able to see the Red Line from 386km away (if it is 10km high, and I've already stated that this might actually not be the case which therefore destroys my point, but if it is:), which means that if you really can't see the Red Line from Enies Lobby, it is more than 400km away from it, correct?
Now we know that it took the Buster Call half an hour to arrive there. Meaning that if Marineford is even 100km away from the Red line and therefore Mariejois (which does not seem to be the case; it's most definitely much, much closer), than the Buster Call warships had to have travelled at over 600km/h to get to Enies Lobby in the time specified.
It is just WAY MORE LOGICAL to assume that Enies Lobby is closer than 300km away from Marineford due to this alone. And Marineford is WAY CLOSER to Mariejois than Enies Lobby or Impel Down, and Shabondy is closer to Marineford than Impel Down or Enies Lobby are. Which leads to the logical conclusion the Red Line should be visible from all those points.
Edit: Once reaching the Red Line, the Strawhats only travelled a few hours to save Hachi and to Shabondy, too. Meaning the distance can't be that far. Why complicate things when it's so much more logical to assume Oda just didn't think about it? This isn't an argument to talk bad about him and that he SHOULD HAVE, after all!!! It's just a statement. And as long as the Red Line is actually 10km high, which I STILL need a proof for (and is therefore the only flaw you can actually just mute my point with), the rest of the argument stands.