I doubt the Ghostbat (in its current form) could take off from an LHD - it is not a STOVL aircraft and many of the reasons for not pursuing the F-35B exist for a Canberra launched MQ-28 as well.Would a Ghostbat be able to embark from a Canberra LHD? now that would be something.
I was wondering why the cancellation of the MQ-9b Skyguardian was cancelled?
Would be great to have the sea guardian able to embark from the Canberra class to proved surveillance and even strike options.
could this be a possible asset ?
The MQ-9B would never have deployed from the LHDs, it would have required a base ashore. The only platform that could maybe do so is the STOL version of the MQ-9, which notably lacks the 'vertical' part to actually recover it efficiently. In any case, these drones arguably aren't survivable in a modern environment (LHD or not..) and would take up a decent chunk of the hangar for their use.
The LHDs can currently field the Tiger ARH and Camcopters (?) for ISR, with Apache w/ Longbow and Integrators (?) in the future also. If the goal is providing surveillance and strike options, in an amphibious context*, there are means to do that.
*The LHDs are also amphibious ships. They can mount strikes with rotary-winged aviation sure, they're flexible, but they aren't an aircraft carrier in the traditional sense. Fitting them to do so isn't also a matter of just buying the drones - the ships would need major changes, and an entire system set up that would detract from their amphibious role. Drone carriers, as a concept, have also never been tested.