Not sure what you mean by "tracking devices". Virtually all commercial aircraft are required to carry emergency locator transmitters (ELTs) and radar transponders. In fact, the US is behind many other countries in that it does not mandate 406 MHz ELTs which can be received by satellites. It is assumed that no ELT transmission was received from MH370 because the aircraft's ELTs are underwater. MH370's transponders were not transmitting once contact was lost with the aircraft.
The ADS-B collision avoidance system, which transmits aircraft position to other aircraft is not required for aircraft operating in the US.
What is not required by either the FAA or ICAO is a system that constantly transmits position and other telemetry to ground stations via satellite. Such a system, had it been installed and operating aboard MH370, would have eliminated the guesswork of locating where the aircraft went down and might even have eliminated the need to recover the aircraft's "black boxes". The need for such a system has been discussed since the crash of Air France flight 447 in 2009. The FAA and ICAO have been historically reluctant to mandate expensive upgrades to the aviation industry, which is why they're still just talking about it five years later.
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Today's Featured Article - Sunday Drives - by Cowboy. Summer was finally upon us here in Northern Maine. We have two types of industry up here, one being "Forestry" (Wood Products) and the other "Farming" (Potatoes). There is no shortage of farm tractors and equipment around here! I have been restoring old Farm Tractors for the past 6 years, and have found it easier and less expensive to hit all the auctions and purchase whole tractors for parts needed. My wife who works at a local school, and only has weekends and summers off, while on t
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