On Tue, 3 Nov 2015 15:48:02 +1300, RussellMc <apptechnz@gmail.com>
wrote:
>?I quite recently read somewhere [tm] that some branch of the US armed
>forces  [they specified but I don't recall] had started teaching this agai=
n
>due to the perecived risk of eg a total GPS outage causing main systems to
>fail.

http://www.latimes.com/nation/la-na-celestial-navigation-20151025-story.htm=
l

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