Fig. 1.
Modes indicating different states (from left to right): tool outside of tracking range, tool far away from insertion point, tool in close enough distance to insertion point
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.