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