Old as Dirt!
Join Date: Nov 2008
Location: Tampa Bay Area
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Re: Possible GPS replacement..
Inertial navigation systems have been around for a very long time, in fact since WWII. It would seem to me that the latest iteration is rather more mental masturbation than not.
The simple, wise, back-ups for a GPS failure--either system wide or shipboard--are ones charts, compass, and, of course, s sextant and decent time piece. S'not complicated.
"It is not so much for its beauty that the sea makes a claim upon men's hearts, as for that subtle something, that quality of air, that emanation from the waves, that so wonderfully renews a weary spirit."