| http://www.w3.org/ns/prov#value | - ingle visual indicator pulsed on and off at a pulse rate in which the pulse rate of the single visual indicator is dependent upon the received signal strength, an audio signal in which the pitch changes as a function of the received signal strength and an audio signal pulsed on and off at a pulse rate in which the pulse rate is a function of the received signal strength; determining the azimuth an
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