The rearward section includes an interior chamber and an opening or channel that extends from {HEAD ~ the chamber} to provide {TAIL ~ a water flow path} between the chamber and the surrounding body of water 
The rearward section includes an interior chamber and an opening or channel that extends from { HEAD ~ the chamber } to provide { TAIL ~ a water flow path } between the chamber and the surrounding body of water
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH