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US Navy grabs old-fashioned sextants amid hacker attack fears


Using a sextant, tables and either MSH or Long by Chron to get your position takes comfortably less than 5 minutes with practice.

In addition military vessels and aircraft usually took a starting fix using sextant and then plotted transits using compass and stopwatch during only confirming final position with another sight based fix at the end of any series of manoeuvres Much quicker and usually accurate enough for purpose.

I can also remember back when I was a 3/0 in the Merchant Navy back in the early 80's that there were one or two companies starting to produce sextants with built in navigation calculators (stand alone versions also being the latest tech at the time) so that you took the sight, pressed the button and plotted the result.

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