The most common one is radar. This gives you a picture of where aircraft are.
transponder/radar
radar
radar
radar
RADAR is the device most commonly used to locate airplanes in flight. In the event of a crash, the aircraft is equipped with an ELT (emergency location transmitter) which broadcasts a radio signal to aid in the search for the aircraft. Emergency search teams can then use specialized radio receivers to locate the ELT, and thus the crash site.
Accordian
a intrument from visayas
What about it?
yes there is
Yes it is.
Madal
the played maplestory