@samwilson @dean This is the second one, Spirit of Tasmania V.
Its sibling ship Spirit of Tasmania IV is currently docked at Williamstown (it's also spent time in Scotland, Geelong and Hobart, among others).
They were not able to be brought into service (Devonport–Geelong) on schedule because the port facilities at Devonport have not been built yet. Maybe October if we're lucky, I think (or was it last October … it's all a bit of a blur).
Spirit V will be used as a venue for Dark Mofo in Hobart in July because you can't make this shit up.