[time-nuts] Celestial Navigation instruction being reinstated in the US Navy
jimlux at earthlink.net
Mon Oct 26 09:13:32 EDT 2015
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.
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.
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