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Active systems are often using a wearable on the swimmer, such as a wristband, that monitors the behaviour and position of the swimmer. If the swimmer is detected to be under water för a certain period, an alarm is triggered and through acoustic underwater communication from the wristband to receivers installed in the pool the alarm is transferred to on-site lifeguards that immediately can ...
Short range: wireless body area network (WBAN) and wireless personal area network (WPAN) applications under standard IEEE 802.15.7, underwater communications. [10] [11] Medium range: indoor IR and visible light communications (VLC) for wireless local area networks (WLANs) and inter-vehicular and vehicle-to-infrastructure communications.
Diver telephone c.1911. The original communication between diver and surface attendant was by pulls on the diver's lifeline. [11] Later, a speaking tube system, patented by Louis Denayrouze in 1874, was tried; this used a second hose with a diaphragm sealing each end to transmit sound, [12] but it was not very successful. [13]
Communication with submarines is a field within military communications that presents technical challenges and requires specialized technology. Because radio waves do not travel well through good electrical conductors like salt water, submerged submarines are cut off from radio communication with their command authorities at ordinary radio frequencies.
A California man has been arrested for a series of alleged violent robberies — including one where he shoved a gun inside a woman’s mouth and broke her teeth, according to authorities.
A college football player with a history of sexual assault raped a 17-year-old girl aboard a Carnival Cruise ship as she was celebrating the holidays with her family — before heartlessly asking ...
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