A very interesting piece by Marcus Hellyer in today's Australian on Naval Shipbuilding and capability. He puts forward a solid argument for constructing additional Hobart Class Destroyers for delivery within the decade alongside construction of the Hunter Class. It certainly makes some sense, and could allow for, as an example, three DDGs to be based at both East and West Fleet Bases. Hellyer also again highlights the well known 'missile gap' as a result of too few cells across too few ships.
There are issues with the current plan its clear that there are now well and truly build gaps. Developing, slowly with time the plan is starting to break up. It clearly and urgently needs an update.
So In part I tend to agree with Marcus on this point.
I worry we are running out of time to fix this. Long lead items like radars, and combat systems aren't already in the pipe. Or suppliers may need to change mid production. The lack of update and surety is hurting industry and suppliers tool up, and getting funding to tool up. Laying everyone off from the attack program and then putting them back on, is destructive. This is exactly the kind of government on and off and on again that has hurt ship yards (and navies) with government decision making. People need security.
With the Pacific ship evaporating as work, the subs with lots of question marks (with possibly half the work evaporating) and the Hunters, never going to meet the original era ~2016 timeframes (which were optimistic even back then, but it was a plan). It may be cheaper to order new ships rather than "slow" work on existing planed ships. The OPV fleet is moving along now with two yard doing eating into the work that was planned for one. So I agree there are work issues.
Also, our surface fleet or manning may need to grow to allow our planned sub manning to grow. Submariners tend to start their careers on surface ships. It helps to have surface seamanship experience. It may help to think of submariners akin to SAS. If you want to grow the SAS, you can't just make the SAS the same size as the regular army. Your SAS recruits would logically be selected from that larger army pool. There is also rotation through and back again as part of retention, recruiting green recruits into SAS and expecting them to spend their whole careers there is unrealistic.. Subs have a similar problem. If someone isn't pulling their weight they are a liability. Australia learnt hard near fatal lessons about conscripting people into subs.
However I disagree with Marcus on his solution.
As for additional DDG's. Well not sure on that one. The supply lines for the Hobarts are cold now, as Alexsa (and redlands18 above) mentioned two of the three yards don't even exist anymore. It was an aging design when we built them. The design has aged further along again. Long lead items have not been ordered. If the program was started today, would be ready before the Hunters? I do believe we need east/west Air defence capability, which we don't have with our fleet of 3 DDG's. It may be faster to start the air warfare version evolution of the Hunter design now and build that as ship 3 and 4.
If there is a VLS short fall I doubt going from the Hunters 32 to the Hobarts 48 is enough. If you wanted a proper destroyer, South Korea has just started work on the KDX-III Batch II.
This is the modern evolution of the burke for a middle power navy. 170m long, 21m wide, 10,000+t destroyers with 88+VLS (with larger than mk48 VLS cells), 5", Aegis, Phalanx. This is an active program, with modern equipment and specifications etc. There are draw backs, while crewing is meant to be lower, its still likely to be more than a Hobart (more like the Perth class DDGs). Its a full 4 x LM2500 powered ship so range will be more limited, but you are still talking about the capabilities of a Burke ship. Another slightly colder option (both ships are already commissioned as of 2021) is the Japanese Maya class ship, which at 169m/22m, 10000t+ and has IEP and should give longer low speed range and lower operating costs.
Each ship would more than double that of a Hobart class in terms of missile capability. Even an evolved Hunter variant with AA capability is unlikely to carry 96+ cells. These ships would be in their own capability niche, as a full sized destroyer. Platforms that could embark TLAM, SM-3, SM-6 and other high capability munitions.
Again with the up gunning the OPV's. The LCS with a missile isn't a destroyer. If you want to do something with the OPV, give them the dismounted systems they need to be useful. If the 40mm isn't enough to cover them, then you have the wrong ship. Fitting missiles to these ships would require significant modifications. Wrong ship. Good OPV. Move on.