Originally posted by TimberWolf
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Reply to: GPS for walking...
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Previously on "GPS for walking..."
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Originally posted by OwlHoot View PostGot one of them - A miniature folding brass sextant about the size of a large pocket watch.
Looks nice in its satin lined mahogany box, but the trouble is I have no idea how to use it.
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Originally posted by xoggoth View Post
I was thinking a little miniaturised Hornblowery thing you could put in your pocket.
Looks nice in its satin lined mahogany box, but the trouble is I have no idea how to use it.
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I think they got pretty good at estimating latitude using a sextant, within a couple of miles IIRC. Longitude needed a watch and/or deadreckoning.
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Originally posted by xoggoth View PostI was thinking a little miniaturised Hornblowery thing you could put in your pocket.
Hornblower (and a gps) will tell you where you are on the globe (even if the map underneath is wrong)
A crack orienteer will tell you exactly where you are on a map (and God help you if the map is wrong)
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Originally posted by xoggoth View PostI was thinking a little miniaturised Hornblowery thing you could put in your pocket.
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I was thinking a little miniaturised Hornblowery thing you could put in your pocket.
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Originally posted by xoggoth View PostDoes one need GPS? Wouldn't it be possible for a device to work out a fairly exact position from sun direction, time, compass position and declination? Like orienteering for people who can't be arsed to do it themselves.
Naturally I am looking for something exceedingly cheap. Thought that went without saying in my case.
for all practical purposes, you have two choices, get the gps system, or get yourself trained up as a top orienteer
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Originally posted by xoggoth View PostAh yes. Second time I've forgotten that point. Did a bug identification app on Android and emailed a site with lots of photos suggesting we did a link to them for those species we did not have. He said they had already paid someone a lot of dosh to look into it and gave up as nobody could get a signal out in the sticks.
Does one need GPS? Wouldn't it be possible for a device to work out a fairly exact position from sun direction, time, compass position and declination? Like orienteering for people who can't be arsed to do it themselves.
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Neither are most GPS units as they won't get a signal
Does one need GPS? Wouldn't it be possible for a device to work out a fairly exact position from sun direction, time, compass position and declination? Like orienteering for people who can't be arsed to do it themselves.
The later and more expensive GPSsLast edited by xoggoth; 18 November 2010, 17:40.
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Originally posted by EternalOptimist View PostI had one of the most 'doh' moments of my life when some spotty youth in Australia explained to me a few years ago how to find North with a digital watch.
He told me to just imagine a clock face, and imagine where the hour hand would be. (The look on his face was 'jeez mate, dont they teach you poms ANYTHING in school ')
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Originally posted by TimberWolf View PostYeah, Australians are always getting lost.
You can use the moon too, though my memory of this is a bit flakier, specifically relating to its accuracy. I have used it though. If you contiue an imagined line of the shadow of the earth on the moon (there is probably a name for this line, but it escapes me) to the horizon, that's south, or north in the southern hemisphere. So I guess at full moon, south is directly below the moon. Course the stars would be easier to use than the moon, except for Australians again.
He told me to just imagine a clock face, and imagine where the hour hand would be. (The look on his face was 'jeez mate, dont they teach you poms ANYTHING in school ')
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Originally posted by xoggoth View PostI used to do that until I found out the bastard was dishonest. I would know exactly which direction to go and it would try and fool me by shining from the North.
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