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Dead reckoning. They still taught it when I went through nav school in 1996. I hated the nav log and the dreaded 6 minute DR, alter heading.
Trying not to derail the thread, folks, but I find this topic to be of much interest. I knew at least one B-17 Navigator - who has since passed on into the Wild Blue Yonder, and hopefully is labeled a "select lead" and "tailwind" Nav.
I'm a Class of '80, so I went through UNT at Mather. I reckon you went elsewhere - and they had quit teaching celestial by then.
When you're on a plane headed 10 hours into nothing but blue Pacific waters, and in the days before INS or GPS - just DR and a sextant, the rest of the crew treated you like a Golden God, at least until they got close to a NavAid that locked on :-)
Am not familiar with your "the dreaded 6 minute DR , alter heading" comment.
To BBRex - cel is not very practical over land on a short route into Germany. It's pretty much impossible for a wingman. You need a very level aircraft with no heading or airspeed changes for accurate readings. In daytime, you'd only get one line of position from the Sun, and if you were lucky, another line from the Moon, hopefully at a much different angle than the Sun.