Thanks Farmer John and deckie71.
I don't think Canberra ever did another three day cruise from Sydney, mainly because that was her last 'line voyage'. She went back later on world cruises as a full time cruise ship, but as a liner we only cruised between 'line voyages', but I could be wrong. Also of course before she became a full time cruise ship, she was two class. Not sure they would have wanted drunken passengers all over the ship. It was bad enough trying to contain them in tourist class