It's worth pointing out that the role of Choules and the role of the Point class are two very different things. The role of Choules (or the sustainment ship) is to do just that - sustain the amphibious force. It might be used to carry amphib forces for use in the assault, but as soon as the landing force is ashore it will turn around and come back to Australia (or an intermediate staging base somewhere), fill up with supplies, and head back to sustain the amphibious force.
The purpose of the Point class ROROs has nothing to do with the amphibious force - they are designed to carry the follow on forces. Once the amphibious forces have captured a port, the Point class land the follow on forces to continue the land fight. The amphibs can't be used to land the follow on forces as they are needed to sustain the initial landing force.
This is a weakness in our own amphibious concept and the Beersheeba brigade - we have (or soon will have) the ability to land on a hostile shore and open an SPOD, but no ability to land follow on forces as we have no way of carrying them (since the amphibs are needed to sustain the initial landing force). If we are serious as a nation about having an amphibious capability as an initial entry force, we need something like the point class ROROs in addition to any sustainment ship so we can actually exploit the initial entry and land the remainder of the combat brigade.
The purpose of the Point class ROROs has nothing to do with the amphibious force - they are designed to carry the follow on forces. Once the amphibious forces have captured a port, the Point class land the follow on forces to continue the land fight. The amphibs can't be used to land the follow on forces as they are needed to sustain the initial landing force.
This is a weakness in our own amphibious concept and the Beersheeba brigade - we have (or soon will have) the ability to land on a hostile shore and open an SPOD, but no ability to land follow on forces as we have no way of carrying them (since the amphibs are needed to sustain the initial landing force). If we are serious as a nation about having an amphibious capability as an initial entry force, we need something like the point class ROROs in addition to any sustainment ship so we can actually exploit the initial entry and land the remainder of the combat brigade.