OVERVIEW: Flare rocket (single spectral) systems deployed from ships are countermeasure munitions designed to decoy infrared-guided missiles by generating intense thermal signatures in a specific portion of the infrared spectrum. These rockets enhance naval self-defense by creating false heat sources away from the ship.

DETAILS: Launched from deck-mounted dispensers or decoy launchers, single-spectral flare rockets produce a concentrated IR signature tailored to match the expected tracking band of known infrared-guided threats (typically in the mid-wave or long-wave IR). The flare rapidly ascends and burns at high temperature, simulating the ship’s heat signature to attract and mislead the seeker head of an incoming missile. Timing, launch angle, and trajectory are critical to ensure the decoy flare is positioned optimally relative to the ship’s motion and threat axis. These systems are often coordinated with onboard missile warning systems and may be used in conjunction with chaff or multi-spectral flares.

ROLE SUMMARY:
Category: Naval Countermeasure
Primary Use: Infrared-guided missile defense
Function: Ejection of high-temperature flare with single spectral IR emission
Strong Against: Older-generation IR-guided missiles, seekers operating in a known IR band
Weak Against: Imaging IR seekers, multi-spectral or dual-mode missiles, missiles with IRCCM (Infrared Counter-Countermeasures)
Platform: Surface combatants equipped with IR decoy launchers
Integration: Works with onboard missile warning and soft-kill defense systems

SOURCE:
Janes Naval Weapon Systems
https://en.wikipedia.org/wiki/Infrared_countermeasure