A device designed to produce a signal (such as light or smoke) to indicate distress and summon aid.

संकट संकेत कार्टिज

English Usage: The sailor fired a distress signal cartridge when he realized his boat was sinking.

Hindi Usage: नाविक ने अपने नाव के डूबने का एहसास होते ही संकट संकेत कार्ट्रिज दागा।