article_snippet.sent: The arrows could mean and where The arrows are pointing to.
article_snippet.sent: Dotted among scrubland, placed in seemingly random spots, The arrows were once markers for early airmail flights across the US - forming the first land-based navigation system in the world.
article_snippet.sent: The arrows were placed at the base of lit beacons near airways, showing pilots the direction pilots needed to fly in to reach the next stop-off to deliver mail.
article_snippet.sent: As the flights got longer, with more frequent stop-offs, so the beacons and arrows were placed to help pilots on pilots way.
article_snippet.sent: In the days before radio and satellite communications, The arrows were a way to ensure pilots could find The arrows way, even in poor weather.
highlights_snippet.sent: The arrows lay at the bottom of lit beacons and showed pilots the direction to fly in to arrive at the next air field .
  