Abstract: An object locating system comprising a first transmitter-receiver unit including a first transmitter for selectively transmitting a first and/or a second search signal, a first receiver for receiving a third search signal and a first signaling element coupled to the first receiver for issuing a first alarm when the third search signal is received by the first receiver; a second transmitter-receiver unit including a second transmitter for selectively transmitting the first and/or the third search signal, a second receiver for receiving the second search signal and a second signaling element coupled to the second receiver for issuing a second alarm when the second search signal is received by the second receiver; a receiver unit including a third receiver for receiving the first search signal and a third signaling element coupled to the third receiver for issuing a third alarm when the first search signal is received by the third receiver.