Sydney Harbour, Fleet Base Garden Island. 12 July 2012.
See Google Earth 33°52'07.15" S 151°13'18.11" E

IMO number : 9628374
Name of ship : OCEAN SHIELD (since 01-05-2012)
Call Sign : VHEH
MMSI : 503728000
Gross tonnage : 8368 (since 01-05-2012)
DWT : 4500
Type of ship : Offshore Support Vessel (since 01-05-2012)
Year of build : 2012
Flag : Australia (since 01-05-2012)

The Australian Government announced it had purchased the Offshore Support Vessel Skandi Bergen to add to the Royal Australian Navy’s current amphibious ships, HMAS Choules and HMAS Tobruk, and subsequently announced that the Skandi Bergen would be renamed “Australian Defence Vessel Ocean Shield”.

The 6,500 tonne ship is 105m long and 21m wide. It has accommodation for up to 100 people, more than 1000 metres of deck area, and a helipad. It will primarily be used to transport troops and supplies in support of humanitarian and disaster relief operations domestically and in the region.

Wikipedia has the following information "Although tasked by the RAN, Ocean Shield will be operated by a civilian crew, and will bear the prefix "Australian Defence Vessel" (ADV), instead of being commissioned and receiving the HMAS prefix”

The RAN website states "The arrival of this vessel will ensure that Defence has the humanitarian and disaster relief capability required between now and the arrival of the two new Landing Helicopter Dock (LHD) ships in the middle of the decade. After Defence introduces the first LHD into service, Ocean Shield will be transferred to Customs and Border Protection to provide a long term capability for Customs and Border Protection."

Captain Jason Britton stated when she was welcomed on arrival in Australia "I can move this ship six knots sideways. We can go 16 and a half knots forward and we can do 13 knots astern."