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Forum: Navigation

05-08-2014, 10:45

Replies: 322

What will Happen to you when GPS goes Down

Views: 40,151

Posted By Auspicious

Re: What will Happen to you when GPS goes Down

Latitude is easy. Longitude is hard. See the movie 'Longitude' or Longitude: The True Story of a Lone Genius Who Solved the Greatest Scientific Problem of His Time: Dava Sobel: 9780802715296:...

Forum: Navigation

02-08-2014, 17:27

Replies: 322

What will Happen to you when GPS goes Down

Views: 40,151

Posted By Auspicious

Re: What will Happen to you when GPS goes Down

Actually we see testing on Chesapeake Bay periodically. Outages are published in LNTM.

Forum: Navigation

01-08-2014, 18:09

Replies: 322

What will Happen to you when GPS goes Down

Views: 40,151

Posted By Auspicious

Re: What will Happen to you when GPS goes Down

+1 ...

Forum: Navigation

01-08-2014, 13:37

Replies: 322

What will Happen to you when GPS goes Down

Views: 40,151

Posted By Auspicious

Re: What will Happen to you when GPS goes Down

ASAT missiles. A bad software upgrade to the constellation. Solar storm. Jamming.

I'm not suggesting that any of these are likely, but they are possible.

Forum: Navigation

01-08-2014, 09:33

Replies: 322

What will Happen to you when GPS goes Down

Views: 40,151

Posted By Auspicious

Re: What will Happen to you when GPS goes Down

That isn't what you said. You said "How many plotter potatoes know how to get a celestial fix out of a plotter that lost its gps signal?" Using an electronic plotter as a plotting aid (like a...

Forum: Navigation

01-08-2014, 08:29

Replies: 322

What will Happen to you when GPS goes Down

Views: 40,151

Posted By Auspicious

Re: What will Happen to you when GPS goes Down

Cool. I'll look them up.

Have you found or developed the spherical trig to avoid needing to use HO tables for celestial nav? I would think one would need some awful almanac data for the stars...

Forum: Navigation

26-07-2014, 10:29

Replies: 322

What will Happen to you when GPS goes Down

Views: 40,151

Posted By Auspicious

Re: What will Happen to you when GPS goes Down

If the system goes down I have a sextant, HO249 tables, a crystal-controlled clock, a stop watch, paper, and pencils.

I have a compass. I can see the sun and stars. It's pretty hard to miss a...

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