Sydney Harbour, off Longnose Point. 17 March 2013
See Google Earth 33°50'42.46" S 151°11'03.40" E

Note Naval Jack of Ireland, the emblem of the Naval Service of Ireland, flying on 17 March

AMSA data : GOOD TIME CRUISES
O.N. 852976 .... Length 30.80 m
Year bulit 1987 .... Type Launch ... Home Port Sydney

Marketing data :
30 metre twin deck cataraman
Can comfortably hold up to 300 people across the lower and upper deck.