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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]
inability to control buoyancy and/or inability to apply thrust sufficiently to ascend (in Scuba diving without a lifeline) inability to return to the shore or a boat after a dive; The diver may get into a situation requiring rescue through incompetence, unfitness or bad luck.
Saturation diving is normally done from a saturation system on a diving support vessel or an offshore platform.While under saturation, the divers cannot be decompressed quickly in response to an emergency as that would be rapidly fatal, and though unusual, emergencies requiring personnel evacuation have occurred on such platforms due to extreme weather or accidents.
Diving equipment, or underwater diving equipment, is equipment used by underwater divers to make diving activities possible, easier, safer and/or more comfortable. This may be equipment primarily intended for this purpose, or equipment intended for other purposes which is found to be suitable for diving use.
The 988 Suicide & Crisis Lifeline has seen a 45% increase in calls, texts and chats since launching this summer. Interim executive director April Naturale explains some of the reasons for the ...
Micro-Ecological Life Support System Alternative is a European Space Agency led initiative, conceived as a micro-organisms and higher plants based ecosystem intended as a tool to gain understanding of the behaviour of artificial ecosystems, and for the development of the technology for a future regenerative life-support system for long term ...
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Veterans may qualify for a free medical alert system. “Medical device companies sometimes offer discounts on the equipment,” says Teague. As with many other medical expenses, if you have funds ...