A tracking transmitter broadcasts a
radio
Radio is the technology of signaling and communicating using radio waves. Radio waves are electromagnetic waves of frequency between 30 hertz (Hz) and 300 gigahertz (GHz). They are generated by an electronic device called a transmi ...
signal which can be detected by a
directional antenna (typically a
Radio Direction Finder.)
By rotating the antenna one can determine the direction the signal lies in and of course whatever it may be attached to. The
EPIRB
An Emergency Position-Indicating Radio Beacon (EPIRB) is a type of emergency locator beacon for commercial and recreational boats, a portable, battery-powered radio transmitter used in emergencies to locate boaters in distress and in need of ...
is an example of a similar device.
It is commonly used in model rocketry and remote control aircraft to locate lost equipment.
See also
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Homing beacon
An emergency locator beacon is a radio beacon, a portable battery powered radio transmitter, used to locate airplanes, vessels, and persons in distress and in need of immediate rescue. Various types of emergency locator beacons are carried by ai ...
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Emergency locator beacon
An emergency locator beacon is a radio beacon, a portable battery powered radio transmitter, used to locate airplanes, vessels, and persons in distress and in need of immediate rescue. Various types of emergency locator beacons are carried by air ...
External links
1.5 volt example transmitter
Wireless transmitters