User:The All-knowing Sith'ari/AN/ALE-151 Decoy

The AN/ALE-151 Decoy is a UNSC-developed ship-based electronic countermeasures system used to draw plasma torpedoes and missiles away from the ship.

Design
The decoy is deployed from the ship from a specialised ome-shot railgun launcher. When it is a safe distance (approx. 500 kilometres) from the ship, it activates, using systems derived from the BLINDER and SPARTOI countermeasures found in the REM-225 Eris electronic warfare drone, jamming guidance systems and creating a sudden multiplication of targets to throw incoming ordnance off course, as well as emitting of high-powered thermal and radar signatures to create the impression of a much larger warship, drawing targets on to itself. A miniturised hafnium-based fusion reactor aboard the decoy powers the systems, and also has the secondary advantage of emitting enough heat to appear to be an actual warship.

BLINDER
The BLINDER system was developed as part of Project EXCALIBUR, designed to confuse attacking missiles' guidance systems or ship-based targeting computers with bursts of strobing jamming, the frequencies of which were constantly altered in a random non-repeating pattern, jamming enemy fire control and missile guidance and targeting systems. Thanks to the micro-fusion plant aboard the decoy, they have a massive amount of energy to throw at enemy sensors. A second BLINDER system aboard the decoy is used to emit carefully-timed radar pulses, which create the impression of a ship using its active radar, presenting a more inviting target to enemy gunners or missile targeting systems.

SPARTOI
Named after the warriors in Greek Mythology that sprang from the ground when Dragon's Teeth were sown, the SPARTOI system was designed to project up to two hundred false electronic and infra-red signatures to act as false targets for missiles or plasma torpedoes targeting actual ships. They can pretend to be an enite squadron of screening vessels, attracting missiles, plasma, or laser fire that would otherwise be targeted at actual ships. Due to the fact that false profiles outnumber real ships by seven-to-one, considerably more false ships are "destroyed" than real ones, which was seen at the Battle of Devout Foreboding to result in a ship that deployed four decoys taking absolutely no hits, even under extremely heavy plasma torpedo fire.

Quotes

 * We had two hundred Baby Kong plasma torpedoes coming in on the Comte de Tourville at Devout Foreboding. We deployed four decoys, and working together with our Thanatos missiles, not a single one hit us!