Glossary: Options

This glossary explains the key technical terms and abbreviations used in this chapter.

Abbreviation / Term	Explanation
C-UAS	Counter-Unmanned Aerial Systems — counter-drone systems.
DEW	Directed Energy Weapons — directed energy weapons.
FCAS	Future Combat Air System — European future combat aircraft programme.
IAMD	Integrated Air and Missile Defence — integrated air and missile defence.
QRA	Quick Reaction Alert — readiness for immediate scramble.

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As of March 2026. All information is based on publicly available sources.