Quick Answer
Flares for land signaling typically use a more intense, longer-lasting burst to alert aircraft, while sea signaling flares are designed to be seen from a distance and often have a longer burn time to ensure visibility over water.
Land Signaling Flares
Land signaling flares are designed to be seen by low-flying aircraft, typically within a few miles. They usually have a shorter burn time, around 30-60 seconds, and produce a brighter, more intense light. The most common type is the Visual Signal Device (VSD) flare, which is a solid, cylindrical flare that burns at a temperature of around 3,000°F (1,649°C). In land-based emergency situations, a minimum of 3-5 VSD flares should be used in rapid succession to maximize visibility.
Sea Signaling Flares
Sea signaling flares, on the other hand, are designed to be seen from a distance over water. They typically have a longer burn time, around 1-3 minutes, to ensure visibility over the horizon. These flares are usually spherical or pyrotechnic and produce a brighter, more visible light. A minimum of 6-8 sea signaling flares should be used in a pyrotechnic pattern to alert aircraft and other vessels. It’s essential to note that the US Coast Guard recommends using only Coast Guard-approved flares for sea signaling to ensure compliance with international maritime regulations.
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