— The U.S. Navy awarded Northrop Grumman Corp. a $96.5 million contract for radio signal jammers designed to foil improvised explosive devices (IEDs). Nearly all the work will be done in San Diego.

The deal is a modification to a previously awarded contract for the Joint CREW Increment 1 Block 1 system. CREW stands for Counter Radio-Controlled Improvised Explosive Device Electronic Warfare.

Northrop Grumman (NYSE: NOC) designed its common system to protect foot soldiers, vehicles and permanent structures.

The Naval Sea Systems Command of Washington, D.C. awarded the deal, which the Pentagon announced June 29. Work under the contract modification is expected to last until 2020.

Northrop Grumman could win more work bringing the contract value up to $505 million, and keeping its production line busy until 2022.