OVERVIEW: DAGAIE Mk 1 LEM (Leurre ÉlectroMagnétique / Electromagnetic Decoy) is a ship-launched, expendable chaff decoy designed for radar seduction of anti-ship missile seekers. It is fired from 115 mm deck launchers to disperse radar-reflective chaff tuned to NATO I-/J‑band frequencies, creating false radar clouds that misguide missile trackers.

DETAILS: DAGAIE (Défense Anti‑Guidage Avancée des Intercepteurs Embarqués) is developed by Lacroix in cooperation with CSEE and France’s DGA . The Mk 1 LEM variant employs aluminized glass-fiber chaff that rapidly blooms and is tuned specifically for the NATO I‑band (8–10 GHz) and J‑band (10–20 GHz), reaching optimum effectiveness against seekers in these frequency ranges. It supports a centroid (seduction) mode, programming chaff release at precise ranges aligned with missile seeker lock-on to break tracking.

FUNCTION:
It is launched from ship-mounted 115 mm DAGAIE multi‑barrel launchers.
Once deployed, it disperses radar-reflective LEM chaff fibers tuned to I-/J‑band frequencies.
This creates compact radar clouds at missile seeker lock-on zones, seducing missiles away from the vessel.

Platforms: Installed mainly on French Navy frigates and aircraft carriers equipped with DAGAIE launch systems.

SOURCE:
Lacroix Naval Solutions – DAGAIE product page: https://www.lacroix-defense.com/produit.php?code=dagaie&langue=en&pole=naval ; “La Fayette Class Frigate” technical overview: https://thaimilitaryandasianregion.wordpress.com/2017/04/10/la-fayette-class-frigate/