The Rip
Geographically , it is the roughly triangular area of water between the land points of Point Nepean on the Mornington Peninsula , Shortlands Bluff and Point Lonsdale on the Bellarine Peninsula , with these three forming "The Heads" . 
<triplet> Point Nepean <subj> Mornington Peninsula <obj> part of <triplet> Shortlands Bluff <subj> Bellarine Peninsula <obj> part of