In some embodiments of the invention, {HEAD ~ a locator transceiver} can include a receiver and {TAIL ~ transmitter} 
include
In some embodiments of the invention , { HEAD ~ a locator transceiver } can include a receiver and { TAIL ~ transmitter }
OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL OTH OTH OTH TAIL TAIL TAIL TAIL TAIL