This invention is a system for locating an object. A tag unit (100) that
is attached or embedded into the object to be located generates radio frequency
signals when excited by an ultrasonic wave (108). The locator unit (100)
generates the ultrasonic wave (108) and receives radio frequency signals
from the tag unit (110). The locator unit (100) determines the signal
strength of the received radio frequency signal and provides a representation of
the strength. By monitoring the signal strength indication, the user will be directed
to the object.
