[time-nuts] Celestial Navigation instruction being reinstated in the US Navy
paulswedb at gmail.com
Mon Oct 26 17:20:30 EDT 2015
Crazy bit of humor/timing in all of this I guess.
Oddly at the last MIT flea I picked up a very nice astro-compass including
case and manual. Also a news clipping that the Navy was restarting training
on celestial navigation. Now I just need to add a mount to the car dash
All prepared for the day the Glenda GPS fails.
By the way if its celestial navigation, next will be slide rules. Pretty
hard to tamper with them. The only virus they get are cold.
Sorry really going astray here.
On Mon, Oct 26, 2015 at 12:52 PM, Scott McGrath <scmcgrath at gmail.com> wrote:
> Or with the appropriate filters you can shoot the sun with a sextant like
> the old time Mariners did
> I still have a sextant and still use it along with a copy of Bowditch
> Content by Scott
> Typos by Siri
> > On Oct 26, 2015, at 9:13 AM, Jim Lux <jimlux at earthlink.net> wrote:
> >> On 10/25/15 9:37 AM, jim s wrote:
> >> Somewhat time related. The Navy realizes that GPS might not always
> >> work. I don't imagine that aircraft in the US Air Force will be able to
> >> do this very reliably, and the article doesn't mention that service. I'm
> >> guessing that a lot of strategic Air Force aircraft have star trackers
> >> that will work some of the time w/o GPS (at night).
> > There's an excellent set of CD-ROMs with about 50 papers on celestial
> nav and time keeping from the Institute of Navigation.
> > https://www.ion.org/publications/upload/CelestialNavTOC.pdf
> > Papers in there about all manner of star trackers and celestial nav,
> from prehistory through the Renaissance era, to modern computerized
> celestial nav boxes, etc.
> > $50, as I recall.
> > Celestial nav during the daytime isn't all that hard, if you have a
> suitable telescope. With a 28x telescope on a theodolite, you can see
> Polaris, for instance. The trick is in finding it first.
> >> Thanks
> >> Jim
> >> _______________________________________________
> >> time-nuts mailing list -- time-nuts at febo.com
> >> To unsubscribe, go to
> >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> >> and follow the instructions there.
> > _______________________________________________
> > time-nuts mailing list -- time-nuts at febo.com
> > To unsubscribe, go to
> > and follow the instructions there.
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> and follow the instructions there.
More information about the time-nuts