FIGS 8 10 illustrate possible alternative embodiments of {HEAD ~ the tie} down coupling {TAIL ~ system} according to the invention 
down coupling
FIGS 8 10 illustrate possible alternative embodiments of { HEAD ~ the tie } down coupling { TAIL ~ system } according to the invention
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH