Sydney Harbour, passing Opera House. 8 March 2017
Vessel at 33°51'17.57" S 151°12'54.79" E

Equasis data:
IMO number : 8835243
Name of ship : GEO RESOLUTION (since 01/10/2014)
Call Sign : V7IE2
MMSI : 538005923
Gross tonnage : 1913 (during 1998)
DWT : 718
Type of ship : Research Vessel (during 1989)
Year of build : 1989
Flag : Marshall Islands (since 01/10/2014)

Data from Wikipedia https://en.wikipedia.org/wiki/HMNZS_Resolution_(A14)
HMNZS Resolution (A14) was a hydrographic ship of the Royal New Zealand Navy (RNZN). Originally the United States Naval Ship USNS Tenacious (T-AGOS-17), the Stalwart-class ocean surveillance ship was used by the United States to locate and track Soviet submarines from 1989 to 1997, when she was transferred to the RNZN for use as a hydrographic survey ship. She served until 27 April 2012. She was subsequently sold to EGS Group, a private surveying company, and renamed RV Geo Resolution