Lockheed Martin will continue to produce Symphony radio-controlled improvised explosive device (RC-IED) defeat jammer systems for the US Navy under an initial $40.8m contract.

Lockheed Martin Radar Systems vice-president Carl Bannar said the Symphony was mounted on convoy vehicles and had been proven in combat against radio-controlled IEDs.

“The system was engineered and built to provide continuous electronic force protection against RC-IEDs in the most rugged, tactical and extreme environments,” he said.

Symphony can be easily installed, operated and maintained on the diverse set of platforms used by security forces worldwide.

In addition, the system is compatible and interoperable with other communications systems and jamming devices.

The Symphony systems are being produced for sale through the foreign military sales programme to allied, coalition and partner nations for operations in Iraq, Afghanistan and other nations.

Production work will be carried out at Lockheed Martin facilities in Florida and Virginia, and in the field of operations.

The contract has a ceiling value of $940m and runs until 2014.