The transducer array is mounted on {TAIL ~ a carriage assembly} which moves back and forth on a pair of rails inside a fluid compartment in {HEAD ~ the probe} 
The transducer array is mounted on { TAIL ~ a carriage assembly } which moves back and forth on a pair of rails inside a fluid compartment in { HEAD ~ the probe }
OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD