Sydney Harbour, between Bradleys Head and Steele Point. 13 August 2015.
Vessel at 33°51'14.77" S 151°15'21.71" 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)

Wikipedia data:
(Formerly) HMNZS Resolution (A14) 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.

Name: RV Geo Resolution, Owner: EGS Group, Acquired: 11 October 2014, Homeport: Hong Kong
Class and type: Stalwart-class ocean surveillance ship
Displacement: 2,262 tonnes, Length: 68 m (223 ft), Beam: 13 m (43 ft), Draught: 4.4 m (14 ft)
Propulsion: Four Caterpillar D398B diesel generators 3,200 hp (2.4 MW) Twin shafts, Bow thruster 550 hp (410 kW)
Speed: 11 knots (20 km/h; 13 mph), Range: 21,500 nautical miles (39,800 km; 24,700 mi)
Boats and landing craft carried: (SMB) Adventure
Complement: 41 (7 officers, 34 ratings), Max accommodation: 45

More at https://en.wikipedia.org/wiki/HMNZS_Resolution_(A14)

Company brochure vessel specifications at http://www.egssurvey.com/pdf/vessels/RV%20Geo%20Resolution%20Brochure_Rev2.pdf