Todjaeger
Potstirrer
Within an Australian context, the RAN escort fitout very much would depend on the current and upcoming programmes.Interesting , In the past there was a (rough and ready) principle of 1 aircraft = 1000 tons of carrier displacement , the increase in aircraft weights however means this ship will likely displace between 30-40k tons .
I can see the attractiveness in delegating all ASW functions to the CV's escorting battle group - with no ASW helo's aboard our hypothetical carrier can obviously accommodate more strike aircraft , This reminds me somewhat of the (WWII) Japanese theory that air reconnaissance should be the responsibility of float planes carried aboard cruisers or battleships , not carrier aircraft .
A problem could arise however if escorting ships were lost or detached for some reason , to maintain 2 or 3 ASW helicopters on constant patrol around the CBG (over a prolonged period) a minimal force of around 10 or 12 S-60B and/or NH90's will be required I'd have thought - drop much below that number and the carrier could become unacceptably vulnerable .
I'd suggest the Medivac , SAR & ASW functions should all be fulfilled by the same type and furthermore the rotary wing complement aboard the carrier should be expanded from 4 to 8 .
It should go without saying this scenario is only relevant in the event of the enemy possessing a viable submarine capability - much the same could be said regarding the need to maintain constant combat air patrols .
Ideally, a RAN CBG would have the CV, a Hobart-class AWD, and ~2 Anzac-class FFH for ASW, or if the "Anzac II" programme has begun, then 1-2 of those, depending on what other escorts are available in quantities. In addition there would be some form of replenishment ship, the type depending on the timeframe of the CBG being formed. There would also be the potential for anywhere from 1-4 (or more) OCV's being fitted out for escort duty, again depending on the programme status. Additionally, I would expect that at least one Collins or "Collins II" sub would be very much nearby the CBG.
As a practical matter, the Anzac/Anzac II and possibly any OCV's would be the primary ASW screening force, apart from the Collins of course. It would also be beneficial for the CV to also have some ASuW/ASW helicopters embarked. However, I do not expect that the medevac/SAR functions could be combined with the ASW/ASuW roles, unless a version of the NFH-90 enters RAN service. Given the issues the ADF is having with just the MRH-90 and the fact that the NFH-90 has not (to my knowledge) reach IOC with the launch customers yet, I suspect that any RAN NFH-90 orders would be years away, if ever.
-Cheers