Savumerkkijärjestelmä

Savumerkkijärjestelmä, known in English as a smoke signaling system, is a method of communication using smoke signals. Historically, this technique was employed by various cultures to transmit messages over long distances. The system relies on the visual perception of smoke plumes, which are typically created by burning materials that produce distinctively colored or shaped smoke.

The effectiveness of a savumerkkijärjestelmä depends on several factors, including the visibility of the smoke, the terrain, and the sender's knowledge of pre-arranged codes. Different combinations of smoke puffs, their duration, and their size could represent specific letters, words, or phrases. This allowed for a rudimentary form of coded communication. The sender would often use damp vegetation or other materials to control the density and color of the smoke, further enhancing the message's clarity.

While largely obsolete in modern times due to advancements in telecommunication, the savumerkkijärjestelmä holds historical significance as an early example of long-distance visual communication. Its development represents an important step in human ingenuity for overcoming geographical barriers. Examples of its use can be found in ancient Chinese, Native American, and other indigenous cultures. The practical application was often for signaling warnings, troop movements, or important news.