Aircraft flight path superimposed over the map of the Eastern coast of the United States, from the Norfolk International Airport, Virginia, through North Carolina and South Carolina to Georgia and southward, to the Jacksonville International Airport, Florida, highlighting the ground-based VORTAC stations
U.S. Department of Defense
<a rel="nofollow" class="external text" href="http://www.dtic.mil/dtic/tr/fulltext/u2/619956.pdf">The IFF Mark XII System (DABS/ATCRBS/AIMS) Performance Prediction Model</a>, Page 7-4 (90), Figure 7-2