Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
LiveView Omnipolar display of AA2. The left panel displays a “starburst” pattern of green vector arrows when the HD Grid is positioned at the site of origin. The right panel displays the vector arrows pointing away from the sight of origin when the HD Grid is positioned at a remote site.
