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During World War II, Germany developed a hand-crank 500 kHz rescue radio, the "Notsender" (emergency transmitter) NS2. It used two vacuum tubes and was crystal-controlled. The radio case curved inward in the middle so that a user seated in an inflatable life boat could hold it stationary, between the thighs, while the generator handle was turned.
This page was last edited on 15 October 2023, at 20:18 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Some emergency radios can also be powered by an attached solar panel. One element that separates some emergency radios from other types of radios, is the ability to broadcast alerts from the Emergency Alert System, even when the radio sound is turned off. This is especially useful in areas where sudden storms, tornadoes, tsunamis or other fast ...
Juridical Recording (orange) Blackbox as part of an ETCS equipment Indusi I60 ER24 control device with the DSK recorder inside. A train event recorder – also called On-Train Monitoring Recorder (OTMR), On-Train Data Recorder (OTDR), Event Recorder System (ERS), Event Recorder Unit (ERU), or Juridical Recording Unit (JRU) – is a device that records data about the operation of train controls ...
A mechanical lever frame inside the signal box at Knockcroghery in Ireland Waterloo station A signalbox, LSWR (Howden, Boys' Book of Locomotives, 1907). Mechanical railway signalling installations rely on lever frames for their operation to interlock the signals, track locks [1] and points to allow the safe operation of trains in the area the signals control.
The Emergency Alert System (EAS) is a national warning system in the United States designed to allow authorized officials to broadcast emergency alerts and warning messages to the public via cable, satellite and broadcast television and AM, FM and satellite radio. Informally, Emergency Alert System is sometimes conflated with its mobile phone ...
The Biophone is a combination voice and telemetry radio communications system used in the 1970s and 80s by paramedics to talk to the physicians supervising them from a hospital base station. The difference between the unit and another two-way radio was that it had the ability to transmit a patient's electrocardiogram .
[[Category:United States radio navigational boxes]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:United States radio navigational boxes]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.
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related to: chelsea yvonne crank radio emergency signal box