A surf break at Point Leo, on the Mornington Peninsula, one of the closest surf beaches to Melbourne in Victoria, Australia known as First Reef or more colloquially just "The Reef". Until the 1970s there was little or no resident surfing population in Point Leo, so the Reef was mainly surfed by the few transient waveriders who were exploring the many breaks to be found in Westernport Bay.
Westernport Bay is part of the Mornington Peninsula, but is not part of Point Leo.
The excerpt states that the First Reef is at Point Leo, which is part of the Mornington Peninsula, and that it is one of the surf breaks in Westernport Bay. Therefore, Westernport Bay must be part of both the Mornington Peninsula as well as part of Point Leo. The model may have been confused by varying locations mentioned in the excerpt.