A Footprint Magnification System (FMS), also known as a "suicide switch" is an electronic countermeasure device that mimics the sensor cross-section of a high-value fleet asset such as a heavy cruiser, making the user a more attractive target for incoming offensive missiles. It was commonly used by smaller ships within a battle group to draw fire away from the command cruiser or other important vessel. While the FMS is an effective tool, it is generally not for long term use or short range combat as the enemy ships will discover the ruse after some time if they close into visual detection range.