HMAS Sirius launched as MV Delos in 2004 converted with RAS gear in West Australia commissioned in 2006 and expected to remain in service till 2021.
The difference between the Berlin class and the Lewis and Clarke is quite different but under the Conops for which they operate is the defining argument for which would be a success in the RAN.
Berlin class are for a smaller Navy with out the need to move large amounts of stores over long distance, whereas Lewis and Clarke are meant to work with a CVN and her escorts plus tying in with the Henry J Kaiser to bring bulk POL. A Lewis and Clark in RAN colours would free up HMAS Choules by bring in urgent but less critical stores not needed in a timelier manner, I can see the rational thinking in Abe’s thought’s on the matter.
Berlin class sats,
Displacement: 20,240 tonnes
Capacity: 9330 tonnes of fuel oil, aviation fuel and fresh water
Cargo space: 550 tonnes mixed cargo
Lewis and Clarke stats,
Displacement,40,300 tons
Max dry cargo weight 5910LT (6,005t)
Max dry cargo volume 783000cf (22,000m3)
Max cargo fuel weight 2350LT (2390t)
Max cargo fuel volume 18000 barrels (2900m3)
(DFM 10500) (JP5 7500)
It’s an interesting dilemma for RAN what is the priority in a replenishment ship, dry cargo or POL, HMAS Choules only has room for 200t of dry cargo capacity according to wiki, both replenishment ships exceed that amount by some margin.