Sydney Harbour, passng Rushcutters Bay and Cruising Yacht Club. 22 April 2017
Heading for Captain Cook Dry Dock Garden Island
Vessel at 33°51'21.99" S 151°14'09.45" E

Marine Traffic data:
IMO: 9107942
MMSI: 235012190
Call Sign: VQAA9
Flag: United Kingdom [GB]
AIS Vessel Type: Passenger
Gross Tonnage: 22365
Deadweight: 5794 t
Length Overall x Breadth Extreme: 180m × 24m
Year Built: 1995

More info at https://www.interislander.co.nz/Our-Ships-And-Services/Kaitaki/Facts-And-Figures.aspx