Savumerkit

Savumerkit, also known as Finnish signal rockets, are pyrotechnic devices historically used for signaling and communication. These rockets typically consist of a propellant charge that generates smoke of a specific color upon ignition. The color of the smoke serves as a code, with different colors representing different messages or alerts. Historically, savumerkit were employed by the military, maritime services, and emergency responders for a variety of purposes, including coordinating troop movements, signaling distress, and indicating the presence of hazards.

The use of savumerkit has largely been superseded by modern electronic communication systems, such as radios and GPS devices. However, they may still be encountered in some niche applications or for historical reenactments. The design and composition of savumerkit are regulated by authorities to ensure safety and prevent misuse. They are generally fired vertically from a launch tube, and their flight path and smoke emission are designed to be visible over considerable distances. Understanding the historical context and the basic principles of their operation provides insight into past communication methods.