I see the local paper on the Central Coast, has reported a story that three 2 metre Hammerheads were recently sighted and photographed (included with story to prove it) at Wyee Point - which is part of Lake Macquarie.
Says the 3 sharks circled a small runabout with a few people on it and then left them alone.
Bit of a worry that they were that far in the lake - a long way from the ocean inlet. Must be some good feeding available for them. (Heard this is the case since the banning of commercial fishing there a few years ago).
Hope you Lake sailors have improved your gybing and water starts.