Primarily, the compass was used for geomancy for a long time before it was used for navigation ... The plate was converted to a bowl, and retained the markings of the heaven's plate around its ...

At the center of the compass is a small circle with a crosshair in the center. To ensure the phone is parallel to the ground, tilt the phone to align the crosshair with the center of the compass.

In a nearly four-hour long ceremony Thursday, dozens of navigators and crew members were honored for their contributions to ...