gregjet said..
Just for the hell of it I had a look on Google Earth at island hopping the eastern chain to Tasmania.
I think it is possible to do with a longest paddle of less than 40km and most about 20
Kayaks cross it quite regularly departing from Wilson's promontory, longest paddle between stops approx 70 km. 3 paddleboarders crossed in 2014 but apparently had to spend majority of time prone paddling or knee paddling. Nicho Ray crossed on a SUP in 2018