One of the issues though, is that if there is to be AUD$1.5 bil. for 'upgrades' when spread across a half-dozen vessels, this works out to some AUD$300 mil. per vessel which was the approximate cost per vessel. Hence my suspicion that such a large amount is to acquire more units, rather upgrades.
Valid point. That would be a massive turn around from the enhanced lethality surface fleet review review.
The $300 mill was a 2018 valuation, do you think, accounting for lessons learnt, that we could build a new hull for that order of magnitude in 2026?
Of note the 2026 IIP is the first time I have seen defence formally state what the role of the Arafuras will be since the lethality review, being "maritime patrol and reconnaissance for the Navy". There are some wording choices that are interesting, because the cape class are described as providing " civil maritime surveillance and enforcement in Australia's waters".
"Surveillance" and "reconnaissance" are not direct synonyms. Neither are the terms "patrol" and "enforcement". Notably reconnaissance is the "R" and surveillance is the "S" in ISR and I can't imagine the author would have used these words without understanding their military meaning.
Also, to get extra pedantic, while the IIP calls out that the capes will be used for civil activities, the Arafuras will work for the Navy. So that infers Naval as opposed to border control workload.
Typically surveillance is a broad ongoing continuous activity. It tends to be generally focused. Reconnaissance occurs after picking up an anomaly through surveillance and wanting to check out further. An out of place vessel doing something peculiar for instance. Or a foriegn Naval ship operating close to our people or assets.
Patrol v enforcement indicates these are observing assets, not the interdicting asset. They will watch and monitor, but something else will be vectored to engage.
So, it would appear the Arafuras are to become spy ships, perhaps the Naval equivalent of the Triton. That would indicate perhaps being fitted out to support drones, such as the blue bottle, ghost shark and Speartooth, and probably some new aerial ones as well.
That's why I'm also thinking an upgraded ESM kit, possibly even some ECM systems.