feature The Autonomous Navigation Systems AET Endorsement Exam available for free to all AEA U.S. Regional Meeting attendees S T O R Y A B Y T H O M A S I N M A N technician considering whether or not to study and take the Autonomous Navigation Systems endorsement exam for the Aircraft Electronics Technician certification from the National Center for Aerospace and Transportation Technologies should keep in mind that the knowledgebased requirements are more general and useful than one might think. If your company doesn't maintain business jets, or any aircraft with inertial navigation or 44 avionics news * september 2014 an inertial reference system, you might be tempted to rationalize that you can work on this endorsement another time. In fact, the knowledge required for the ANS endorsement exam is quite general, and studying for the test will help a technician get a firm grasp of all flight instruments. A student or technician preparing for the ANS endorsement exam should begin with its basic definition. Being autonomous means acting independently. Navigation