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RE : http://fer3.com/arc/m2.aspx/Spoofing-celestial-navigation-FrankReed-aug-2013-g24770

Dear Frank,

When I first read your new post, I was under the impression that you might have found a quite smart and clever way of spoofing CelNav (for less than 5,000 $).

A number of Contributors further gave their ideas here which you graded with "pluses and/or minuses" but did not seem to publish your "own" solution ...

What is then your such solution ?

Best Regards

Kermit

PS : In http://fer3.com/arc/m2.aspx/Spoofing-celestial-navigation-Couëtte-aug-2013-g24774, I suggested to simply offset all GHA's by one same amount. Provided you start from scratch with a big/huge uncertainty on you DR Position, let's say over 100 NM (which I confess might not be applicable to this specific example of yours) and if all the NAL GHA's were offset by 2 degrees, all CelNav Longitudes would be offset by a full 2 degrees from actual ones. And I keep thinking that, without any independent position checking, you might not be able to detect such error (unless you carefully check your SUN GHA at 00:00 UT and 12:00 UT, but would "your" sailors do it?). This might be a simple and cheap implementation (possibly less than 5 grand in cash to the printer ...) Your ideas here too ?
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