Spirent Federal has provided the U.S. Navy with a simulation system that will be used to test a variety of GPS receivers, the company announced. The systems, acquired by Naval Air Systems Command PMA209 Common System Integration Lab in Patuxent River, Md., include Spirent Federals’ GSS7712 L1/L2 simulators, Classified Package, Pseudo M code, Remote Control option, Inertial Interfaces and training.