04-15-2014, 02:53 AM
old school celestial navigation practitioners and cruising sailors start to use the southern cross about lat 20....
thats also about the same latitude the fish become "tropical" in color
Crux: http://en.wikipedia.org/wiki/Crux
Crux is easily visible from the southern hemisphere at practically any time of year. It is also visible near the horizon from tropical latitudes of the northern hemisphere for a few hours every night during the northern winter and spring. For instance, it is visible from Cancun or any other place at latitude 25° N or less at around 10 pm at the end of April.[1][2] There are 5 main stars.
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thats also about the same latitude the fish become "tropical" in color
Crux: http://en.wikipedia.org/wiki/Crux
Crux is easily visible from the southern hemisphere at practically any time of year. It is also visible near the horizon from tropical latitudes of the northern hemisphere for a few hours every night during the northern winter and spring. For instance, it is visible from Cancun or any other place at latitude 25° N or less at around 10 pm at the end of April.[1][2] There are 5 main stars.
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