That’s what I was clearly alluding to with “inland bases”. An airbase in the outback would provide better security not only against missile launching submarines, but also saboteurs with modern means such as drones. Woomera is an obvious example, though surprisingly may be too close to the coast if the CCP submarine threat is considerable enough. The investment in additional bases would be a massive addition to the actual cost of these bombers. Consideration of USAF investment in such bases and joint force operations would probably be necessary. Woomera & Alice Springs possible choices along with a further expansion of Tindal.