The story behind the large concrete arrows across America

1

More than 100 years ago, pilots had to trust a compass and their own bearings to navigate long distances — there was no such thing as GPS. At night or during bad weather, air travel was almost impossible due to poor visibility.

The U.S. Postal Service was severely affected by this, as there would often be large delays in deliveries if flying conditions were not suitable. One of the first attempts at overcoming this dilemma was to light bonfires that would mark routes to various destinations.

Unsurprisingly, this proved to be rather impractical, as a lot of time, effort and money was required each time an aircraft required them. Learning from this, the government then decided on the construction of several large and illuminated concrete arrows along popular aviation routes, which directed pilots to cities in America. [Read more…]