Development
On-going developments based on initial research undertaken in Australia by the Commonwealth Scientific Industrial Research Organisation (CSIRO) after the 1994 mine accident and given further impetus by the investigations into the Sago Mine disaster the PED System is undergoing further development to provide two-way through the earth communication capability.
Emerging technologies have recently been developed such as the Rescue Dog Emergency Through the Earth Communication System developed by E-Spectrum Technologies. The Rescue Dog is a two-way extended range portable through-the-earth solution that was developed in the US in cooperation with The National Institute for Occupational Safety and Health (or NIOSH) which does not rely on large loop surface antennas for signal transmission. New non-portable systems have also been developed by companies such as Lockheed Martin for use in emergency chambers to provide post-accident, two-way, emergency voice and text communications independent of surface or in-mine infrastructure.
Read more about this topic: Through The Earth Mine Communications
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