Thanks for the comments Bob and Dave. Yes Dave, Sydney harbour really is a beautiful sight, even on a stormy day such as the one in the shot of the Queen Elizabeth. On a sunny day it's absolutely spectacular.
Bob, the red speed boat is a jet drive vessel used to give thrill seeking passengers a high speed run around the harbour. I have not been on it, but those who do need to be prepared to get wet, as it performs some fairly radical manoeurvres in the course of the trip. On this occasion those on board had the added bonus of getting up close and personal with the Queen Victoria, which was making its first (of many) visits to Sydney.
I have no idea of how much fuel would be used on such a voyage, but I do know I would not like to have to pay the bill
Peter.