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I don't have to log on to some silly website to figure out "civil twilight" (whatever that is) everytime I go to fill out my little log.
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My original response was to the statement:
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Everyone knows damn well it isn't night out only a half hour after sunset. At least not in ND.
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My point was that, yes, indeed, it is night, and loggable as night, according to the FAA. By the way I read the first quote, it seemed as though the poster didn't think it was legitimate to log night if there was any light left.
As far as the silly websites go, I use them all the time before I fly, like duats.com or adds.aviationweather.gov. It's just another resource. I don't see it as that big of a deal. Just check the time and move on. All I'm trying to do is keep an accurate log. I don't see anything wrong with waiting until it's totally dark, I just prefer what I consider to be a more precise method.
And FWIW, "civil twilight" is "the period beginning with sunset and ending when the center of the refracted Sun is more than six degrees below the horizon" according to Dictionary.com. I don't know exactly what that means. It sounds familiar, but I don't know where I've heard it before. I did a quick scan of the AIM and didn't see anything about it.