GPS will not penetrate through most home construction materials. It can be blocked by heavy forest, snowfall, and other natural events. You could wrap the GPS system with aluminum foil or put it in a metal toolbox.PS is able to provide lateral as well as vertical guidance to the aircraft to assist them in landing in poor weather conditions. Another use of a GPS is for nautical tracking and guidance. Boats are able to use GPS devices to determine fishing grounds and see routes.
1 Consultation fees typically cost $150-$350 and may not be included in price estimates for testing and treatment. In addition, some hospitals may charge a facility fee of up to $500 for a sleep study.  The cost of a sleep study typically ranges from just under $1,000-$3,000.
Answered on: 4/17/2012. The cost of a sleep study varies from sleep lab to sleep lab and city to city. The average cost of a diagnostic sleep study is about $1700. Hospital based sleep labs can, for some reason, charge twice that amount. Look for a lab associated with a physician who is board certified in sleep medicine. There will be charges for the doctor's consult and for the equipment to treat the sleep apnea.