How effective are colored smoke signals compared to traditional flares?

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Signal Characteristics Colored smoke signals are made by burning colored smoke-producing compounds, such as calcium carbonate or zinc stannate, which provide a dense, persistent smoke. These signals can be seen for up to 30 minutes, compared to traditional flares, which typically burn for 60-120 seconds. The smoke can be seen from a distance of up to 10 miles, allowing for more effective signaling in areas where visibility is limited.
Signal Types and Applications Colored smoke signals come in various colors, including red, orange, yellow, green, and purple, each serving a specific purpose. Red smoke signals are used for emergency situations, while green smoke signals are used for signaling friendly intent. Orange smoke signals are used for signaling distress at night, and yellow smoke signals are used for signaling friendly intent in daylight. Purple smoke signals are used for signaling that a ship is in distress and needs assistance.
Safety and Practicality Colored smoke signals are also safer to use than traditional flares, as they do not pose a risk of burns or injury. Additionally, colored smoke signals can be more practical for use in certain situations, such as in areas with high winds or where visibility is limited. They are also more environmentally friendly than traditional flares, which can harm the environment and wildlife.