Yes but we selected the MU90, originally to reequip the ADFs major surface combatants, Seahawks, Super Sea Sprites and Orions but in the end only the FFGs and ANZACs ended up getting them due to procurement issues (a common theme with many procurements from the late 90s onwards, we bought highly developmental systems under the mistaken belief they were MOTS).Havent we equiped the Romeo with the Mk54?
Once the issues were realised the new government cut their loses and cancelled integration on Seahawks and Orion (as well as cancelling the Sprogs) as it was seen as a waste of money updating platforms due to be replaced within a decade to carry a weapon that was so far behind schedule.