The number of non coherent passes defines the number of times {HEAD ~ the search engine} steps through {TAIL ~ the PN offsets} designated by the search window 
The number of non coherent passes defines the number of times { HEAD ~ the search engine } steps through { TAIL ~ the PN offsets } designated by the search window
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH