Looking at this simplistic view of Strikemaster spread out over northern australia.. why this couldn’t be developed to spread out over our near region from Indonesia..png and pacific islands to create a defensive line together with the evolved cape class with NSM and GPF moving about the seas to command and control the environment. The government could use this to speed up the missile program by making the NSM in Australia. Bushmaster, skyranger boxer already ready to be produce on our shores. NSM picked for our navy and airforce to use variant inside F35. Why we haven’t started this mind numbing .
I think Tbone, one of the problems with stationary or even ground based anti ship defences, is that they are vulnerable to air strikes. The LRASM for instance can be fired from about 400km, and there are other ship based land strike missiles with similar ranges that potential enemies posess, all outside the range on NSM. So a strikemaster then needs air protection, such as a NASAMS platoon. Yes skyranger type solutions could be employed, but they are going to struggle against advanced missiles.
Secondly, any slow or fixed defence is spottable in the modern era. There are other conversations on the detectability of a submarine snorkle in this forum for example, let alone something as large as a missile team.
Ships are also detectable and vulnerable to attack, but they move (relatively) fast, easily shifting 1,000km in a day with near instant mobilisation, and are (reasonably) well equipped to defend themselves.
Thirdly defence systems go where there is something to protect. So on our northern approaches for instance, there is validity around Darwin, but then Darwin has several air bases close by which provide more effective cover than a strikemaster would do. If an enemy wishes to make a landing in the Kimberly, then I am of the view that the mangroves, snakes and crocodiles should keep us safe.
I think its also worth understanding the capabilities of the NSM and its ability to get through a modern frigate defence system. The actual data here is largely classified, however it is reasonably understood that a single NSM style attack is unlikely to be successful against a modern surface combatant. A high chance of success will require multiple missiles combined with other tactics, such as distractions, multi directions, SEAD and the like. As such a single strikemaster deployment has limited capability. Several would be needed with other assets.
My view is that strikemasters can work in small numbers that move around as a combined force, and this aligns with the US and Australian army current philosophy. But it has however limitations for mass use and protection, which is why ship and aircraft based systems are necessary.
I think one of the biggest questions to what gear gets purchased and when, relates to when and how conflict might occur. Everybody will have a different view on this ranging from imminently, to next decade to never, and from push and shove, to conventional to nuclear. If it's imminent then we will go to war with what we have today, no acquisitions will help us including strikemaster and new GPFs. If its next decade then we have some time to prepare and can invest in the better purposed procurements. This is the million (billion) dollar question, with no easy answer.