BAE Systems received a $13 million contract modification from the Naval Air Systems Command to provide 500 identification friend or foe (IFF) digital transponders and spares to the U.S. Navy and Army.

The AN/APX-118 common transponder identifies aircraft and ships as friendly forces by responding to interrogations from ground-based or airborne IFF systems.

The transponders, installed on aircraft and naval vessels, positively establish the identity of friendly forces.

Those that do not identify themselves as friendly are considered threats.

"Our system allows pilots to perform their missions and return home safely," said Sal Costa, director of combat ID products and systems for BAE Systems in Greenlawn, New York.

The Navy and Army use the common transponder on submarines, surface ships, fixed-wing aircraft, and helicopters.

The AN/APX-118 replaces outdated IFF transponders with digital technology, improving the reliability and maintainability of aging systems.

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