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Up to date for version 0.8.1a-RC8

EW Governing aptitude: Technology
Deploying sensor jammers at key locations in the battlespace is common practice. A dedicated focus on electonic warfare allows all ships to supplement these in establishing sensor-wavefield dominance.
Level 1

Every deployed ship grants +1-4% (depending on ship size) to ECM rating of fleet (all ships in fleet)

Hull mod: ECM Package

Level 2

15% maximum enemy weapon range reduction

Level 3

20% maximum enemy weapon range reduction

Hull mod: ECCM Package