The system also serves as {TAIL ~ a testing system} for control umbilicals that usually are located near {HEAD ~ the pipelines} 
The system also serves as { TAIL ~ a testing system } for control umbilicals that usually are located near { HEAD ~ the pipelines }
OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD