Current emergency locator beacons transmit their current GPS location as it changes repeatedly. This First Location GPS emergency locator buoy-beacon repeatedly informs rescuers of the GPS location where the plane first went down in water and its current position after the buoy-beacon is moved by wind or current because sometimes transmissions are not received until long after the crash that activated them. This floating buoy-beacon for planes transmits its continual intermittent repeating bursts containing its first and current GPS location. It could also transmit a sequence of positions and times starting from when it was first deployed. The waterproof brightly colored buoy-beacon is ejected from the bottom or top of an aircraft (or both) automatically when a combination hydrostatic water-depth-pressure- sensor / float-switch (and wet switch) is activated, or by inertial accelerometer crash-trigger, It could also be triggered manually.
Positions would be recorded on a simple solid state memory periodically. Solar photo-voltaic panels recharge the rechargeable batteries that power the transmitter and GPS recording system. The transmitter would transmit continually from the moment the buoy-beacon was first deployed until it is turned off or destroyed. It can also be used on boats.
Black boxes on airplanes emit acoustical pings some hundreds of miles.
Distress radio beacons, emergency position-indicating radio beacons,. and personal locator beacons are all very common. They are very sophisticated and their transmissions are monitored by satellites. But they don’t repeat the first location GPS repeatedly, only their current position. Satellites, if they have received a first transmission of GPS location, will repeat all transmissions, only if they did indeed receive the first transmission when the plane first went down.
This First Location GPS Emergency Locater Transmitter Buoy For Planes would help locate downed planes immediately like the one that disappeared over the South China Sea this week of 3/12/2014.