Post by sherlew99 on Feb 20, 2015 20:30:52 GMT -6
From Sometimes Interesting
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Concrete Arrows and the U.S. Airmail Beacon System
Dec 4, 2013
Scattered across the United States are a network of mysterious concrete arrows. They are often found in remote locations or areas difficult to access. Some will be accompanied by a small shack, a few have a metal tower affixed to their base. Many are in good condition while others have succumbed to nature. The shape and direction of the arrows vary, but it is clear they served the same purpose.
The purpose was important: helping early pilots navigate U.S. transcontinental flights at night.
Dec 4, 2013
Scattered across the United States are a network of mysterious concrete arrows. They are often found in remote locations or areas difficult to access. Some will be accompanied by a small shack, a few have a metal tower affixed to their base. Many are in good condition while others have succumbed to nature. The shape and direction of the arrows vary, but it is clear they served the same purpose.
The purpose was important: helping early pilots navigate U.S. transcontinental flights at night.
Click here for the rest of the article.
