Longwaved

Longwaved refers to a category of electromagnetic radiation characterized by longer wavelengths compared to other types of radio waves. Within the broader spectrum of radio waves, longwaved signals typically range from approximately 1,000 to 30,000 meters in wavelength, which corresponds to frequencies between 10 and 30 kilohertz (kHz). This band is also known as the Very Low Frequency (VLF) range, though the exact boundaries can vary depending on classification systems.

Longwaved signals are primarily used for long-distance communication, particularly for submarine and naval applications. Their ability to propagate efficiently along the Earth's surface, a phenomenon known as ground-wave propagation, makes them ideal for transmitting messages over vast distances with minimal interference from atmospheric conditions. This characteristic has historically been crucial for maintaining communication links with submerged vessels, which cannot rely on line-of-sight or sky-wave propagation methods.

The longwaved band is also utilized in some navigational systems, such as the Omega Navigation System, which provided global positioning services before the widespread adoption of GPS. Additionally, longwaved transmissions have been explored for scientific research, including studies of atmospheric and ionospheric phenomena.

Despite their utility, longwaved signals are limited by their low data transmission rates, making them unsuitable for modern digital communication needs. The development of more efficient and higher-frequency technologies has largely reduced the reliance on longwaved systems, though they remain relevant in niche applications where low-frequency propagation is essential.