In the prior art, an end of such pipeline might be terminated at the base 44 where the buoy 40 was anchored, and {HEAD ~ a vertical pipe} would extend up from the base to {TAIL ~ the buoy} 40 
extend up to
In the prior art , an end of such pipeline might be terminated at the base 44 where the buoy 40 was anchored , and { HEAD ~ a vertical pipe } would extend up from the base to { TAIL ~ the buoy } 40
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL OTH