Guidance is provided to aircraft operators for requesting an aircraft call sign and explains the assignment and the authorization process for their use domestically, within the National Airspace System (NAS); and their use internationally.

This Advisory Circular (AC) provides the general public with a common use document thatdescribes the Plan for Emergency Security Control of Air Traffic (ESCAT), and its purposefor use by civil aviation. When emergency conditions prompt implementation of ESCAT,flights will be required to comply with any airspace and/or flight restrictions that may beissued in support of National Defense or Homeland Security initiatives.

Specifically, this AC provides guidance to aircrews and reflects current guidance for air traffic control (ATC) on the formal reporting of laser illumination incidents.