Defense contractor Telephonics Corp. has won a $13.25 million contract to manufacture friend-or-foe interrogator systems for NATO's E-3A AWACS fleet, the Department of Defense announced.

The systems are designed to let the E-3As identify friendly military and civilian aircraft as part of their airborne warning and control mission.

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Telephonics, which employs about 1,100 workers on Long Island, will perform the work at facilities in Huntington and Farmingdale, a spokesman said.

Work on the contract is expected to be completed by November 2017.

Telephonics is a subsidiary of Griffon Corp., a publicly traded company based in Manhattan.