A system for tracking an object in space for position, comprises a
transponder device connectable to the object. The transponder device has
one or several transponder aerial(s) and a transponder circuit connected
to the transponder aerial for receiving an RF signal through the
transponder aerial. The transponder device adds a known delay to the RF
signal thereby producing an RF response for transmitting through the
transponder aerial. A transmitter is connected to a first aerial for
transmitting the RF signal through a first aerial. A receiver is
connected to the first, a second and third aerials for receiving the RF
response of the transponder device therethrough. A position calculator is
associated to the transmitter and the receiver for calculating a position
of the object as a function of the known delay and the time period
between the emission of the RF signal and the reception of the RF
response from the first, second and third aerials. A method is also
provided.