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    Re: Hypothetical Exercise - Abduced By Aliens
    From: Greg R_
    Date: 2008 Jul 1, 20:23 -0700

    --- m_burkes@msn.com wrote:
    
    > Hi folks, Sorry to belabor this great problem but I suppose if one
    > were cast to the high seas he can at least determine the hemisphere
    > by the star configuration
    
    See my musings on the subject in the [Discussion] thread:
    http://www.fer3.com/arc/m2.aspx?i=105475&y=200806
    
    > and if Northern hemisphere Polaris can yield Latitude and therefore 
    > carry on with the further iterations.
    
    Good point as well - there were some pretty good ideas floated on this
    one, I don't think any of us on the list would stay "lost" in a
    situation like that for too long...  ;-)
    
    --
    GregR
    
    
    
    --- m_burkes@msn.com wrote:
    
    > 
    > Hi folks, Sorry to belabor this great problem but I suppose if one
    > were cast to the high seas he can at least determine the hemisphere
    > by
    > the star configuration and if Northern hemisphere Polaris can yield
    > Latitude and therefore carry on with the further iterations. I may
    > have missed this in the discussions and thanks much.
    > Mike Burkes
    > 
    > On Jun 15, 10:18 pm, "Greg R."  wrote:
    > > [The basis for this hypothetical celnav problem has been discussed
    > (at least in theory) on the list before, so let's try it with a "for
    > real" exercise]
    > >
    > > After recovering from being unceremoniously dumped on an unknown
    > shore in his/her last adventure (not to mention draining the sailing
    > budget with salvaging the boat and the boatyard repair bills), our
    > intrepid navigator decides that a several-weeks long cruise to
    > somewhere in the distant islands would be just the ticket. Several
    > days into this idyllic voyage a definite feeling of relaxation starts
    > to set in - ah, now this is the life.
    > >
    > > But of course, it was not to continue... after toasting yet another
    > glorious sunset at sea, our intrepid navigator suddenly finds his/her
    > reverie broken by a group of very bright lights moving rapidly
    > through the sky. After passing close abeam, the lights abruptly
    > change course and hover directly over the boat, illuminating it with
    > what can only be a several-billion candlepower searchlight. To
    > his/her horror, the navigator suddenly finds the entire boat being
    > lifted out of the water and into the open doors of what appears to be
    > some sort of alien spacecraft. Then just as suddenly as they
    > appeared, the armada of alien spacecraft abruptly depart for an
    > uncharted (at least to us) part of the galaxy.
    > >
    > > Luckily for our intrepid navigator, the aliens are only curious and
    > do him/her no harm. After a couple hours of poking and prodding (and
    > having a good laugh over the primitive Earthling navigation
    > equipment), they realize that the human lifeform is so vastly
    > inferior to their own that nothing further would be gained from
    > holding him/her any longer and they decide to return their captive
    > back to Earth.
    > >
    > > In an instant (at least in Earth time) they're once again hovering
    > over the navigator's home planet, gently place the boat back in the
    > water, and disappear once again before the navigator has a chance to
    > fully comprehend exactly what just happened.
    > >
    > > But there's no time to dwell on this latest adventure... like a
    > good navigator s/he realizes that the most pressing problem right now
    > is to figure out where the boat is now located (at least it seems to
    > be on an ocean, which is a good thing...), but notes with some dismay
    > that all of the onboard electronic navigation/computer gear was
    > apparently zapped by being transported to the outer reaches of the
    > galaxy.
    > >
    > > However, all of the celnav gear (sextant, books, plotting tools,
    > chronometer, etc.) is still intact and onboard, evening twilight is
    > approaching, and with an ironic sense of deja vu the navigator takes
    > these sights:
    > >
    > >   05:46:40Z  Vega  Hs = 16�38.8'
    > >   05:52:18Z  Spica  Hs = 54�43.4'
    > >   05:54:26Z  Pollux  Hs = 21�02.6'
    > >
    > > Height of eye on the boat = 8 feet, index error = 0.0', and assume
    > standard atmospheric conditions (the salvage/repair/refit budget
    > didn't allow for purchasing a new barometer and thermometer). Last
    > known Earth date was June 14, 2008 - you can ignore any dilution of
    > time factors (or other effects of trans-space travel).
    > >
    > > Where are we? And where is the nearest civilization?
    > >
    > > Discussion item: How would you go about solving this particular
    > navigation problem?
    > >
    > > --
    > > GregR
    > > 
    > 
    
    
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