Star-shell, also known as signal flare or parachute flare, is a pyrotechnic device used to produce bright light and signal for help. There are several related terms that can be used as synonyms for this word, including distress signal, beacon, illuminator, and locator. Other synonyms may include rocket flare, emergency flare, handheld flare, or safety flare. Regardless of the terminology used, these devices are designed to provide an effective means of alerting others to the location of someone in distress or danger. They can be used by mariners at sea, hikers, campers, and others to draw attention and summon assistance.