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This frequency had the advantage of long range due to ground-wave propagation and was constantly monitored by all large ships at sea after the Titanic's sinking. However, due to its wavelength of 600 meters, a long antenna was required to achieve good range. Long wires on the order of 1/4 wavelength held up by kites or balloons were often used.
Like the other radios, this model receives emergency weather forecasts from NOAA and updates from AM/FM stations, and it has a 2000mAh battery equipped with a USB port to keep your phone charged.
A long-range acoustic device (LRAD), acoustic hailing device (AHD) or sound cannon is a specialized loudspeaker that produces sound at high power for communicating at a distance. It has been used as a method of crowd control , which has caused permanent hearing damage , having an extremely high decibel capacity (up to 160 dB measured at one ...
An emergency communication system (ECS) is any system ... Short-wave (or Amateur) radio is a relatively long range method of communicating using radio waves. Because ...
The RunningSnail MD-090P Emergency Weather Radio will ensure you stay connected and receive crucial updates during power outages, severe weather, or other situations, providing peace of mind when ...
2182 kHz is analogous to channel 16 on the marine VHF band, but unlike VHF which is limited to ranges of about 20 to 50 nautical miles (40 to 90 km) depending on antenna height, [3] communications on 2182 kHz and nearby frequencies have a reliable range of around 50 to 100 nautical miles (90 to 190 km) during the day and 150 to 300 nautical miles (280 to 560 km) or sometimes more at night.
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