Sensor Jammer

ECM (in versions 2.2.0 and later) is a set of three ship systems that reduce the effectiveness of enemy sensors and missiles.

Components
Engines and Power Plants	Engine • Fuel Storage • Jump Engine • Power Plants
Beam Weaponry	Beam Fire Control • Lasers • Particle Beams • Mesons • High-Powered Microwave • Plasma Carronade • Railguns • Gauss Cannons
Missile Weaponry	Missile Fire Control • Missile Launchers • Magazines
Defensive Systems	Armor • Shields • CIWS • Sensor Jammer • Fire Control Jammer • Missile Jammer • Decoy Launcher • Cloaking Device
Maintenance and Repairs	Engineering Spaces • Maintenance Storage Bay • Damage Control • Maintenance module
Carriers and Fighters	Hangar deck • Fighter Pod Bay
Sensors	Active Sensor • EM Sensor • Thermal Sensor • Geological Survey Sensors • Gravitational Survey Sensors • ELINT Modules
Command and Control	Bridge • Flag Bridge • Auxiliary Control • Science Department • Main Engineering • Combat Information Centre • Primary Flight Control
Transportation	Cargo Hold • Troop Transport Bay • Cryogenic Transport • Passenger Accommodation
Logistics	Cargo Shuttle Bay • Refuelling System • Ordnance Transfer System • Tractor Beam
Production	Orbital Mining Module • Sorium Harvester • Terraforming Module • Jump Point Stabilisation Module • Salvage Module