Hmm, how about sketching the pattern of stars you see on the horizon along with ... | Hacker News

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		gibybo on Nov 8, 2011 \| parent \| context \| favorite \| on: Man throws 4,800 bottled notes into the ocean, get... Hmm, how about sketching the pattern of stars you see on the horizon along with a date and (approximate) time?

icebraining on Nov 8, 2011 [–]

Or learn how to build and use an astrolabe. It's not rocket science and gives them your approximate latitude.

ruggeri on Nov 8, 2011 | [–]

Good point. If the island has WiFi you can look it up on Wikipedia :-)

icebraining on Nov 8, 2011 | | [–]

I learned how to build one in elementary school (as a Portuguese, we have quite an history of sea exploration).

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