Security Levels

National Terrorism Advisory System (NTAS) check current status

Georeferencing Information for SAR Responders

General Information

United States National Grid (USNG)

The U.S. National Grid (USNG) System is an alpha-numeric reference system that overlays the UTM coordinate system. It is a Federal Geographic Data Committee (FGDC) standard developed to improve public safety, commerce, as well as aid the casual GPS user.
[Link to USNG information page]

Global Area Reference System (GARS)

GARS is an administrative measure used to rapidly and clearly define geographical locations for battle-space coordination, deconfliction and synchronization as well as for large-area search-and-rescue efforts.  GARS is global in scope, providing a common language between the services/combatant commands and simplifying communications.

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Last Modified 7/24/2009