Date: 20 Jan 98 01:29:34 From: Das Pork <firstname.lastname@example.org> Organization: IBM.NET References: 1
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While the celestial navigation angle sounds interesting, I'm not sure I agree with it. I'd lean towards the viewing area theory as to why the eyebrow windows are installed. These windows are generally if I recall on narrow body aircraft which tend to have much smaller cockpit windows. If you've ever sat in the front seats of an L-1011, 757/767, 747 or really any wide body, you'd see there's really a very large viewing area through the windows. The 727 and DC-9/MD-80 series for example, are pretty difficult to see out of relative to the larger aircraft. Also even the older 747's for example, had a smaller window in the ceiling of the cockpit (not above the pilot's) that the fourth (fifth?) crew member, the Navigator, used to sight with a sextant for celestial navigation. I don't know that smaller aircraft like the 727 and DC-9's were used to go such long distances away from navaids, that celestial navigation was ever a general operating issue for them. Aircraft old enough to have been built with Navigator's in mind, often had such small, specialized ceiling windows for celestial navigation. Of course that's just my opinion, I could be wrong.