The elephan
One has to be a bit careful with figures on MSC strength - there has been ups and downs as one class enters service while another leaves but the base figure hasn’t changed. We have had 11-12 destroyers or frigates as the nominative fleet size since the early 70s when it was 3 DDG, 3 Daring and 6 Type 12 (admittedly plus 1/2 ex DDSs/FFs as training ships). That went to 3 DDG, 4 FFG and 5 T12 in the mid 80s, 3 DDG, 6 FFG, and ANZACs replacing T12s on not quite a one for one basis by the late 90s, to 4 FFGs and 8 ANZACs by 2010. It’s been the achievable figure for 50 years. And the present aim is 9 Hunters and 3 Hobarts. Whether it is the right number is another question.
The elephant in the room is that we operated a carrier until the early 80s, with a replacement program for it on the books until 83. Publically the retirement of the carrier was meant to lead to increased MFU numbers, at one point ten FFGs being flagged.
There were also multiple projects to increase major combatant numbers from the late 50s onwards. Everything from ex USN destroyers, locally built corvettes or light destroyers, intended to supplement, not replace, the existing destroyers and frigates. A total of 23 was desired, while maintaining the carrier capability.
This number (23) was policy while Malcolm Frazer was Defmin. Three carriers, to support a two ocean navy, was aspirational at this time.
During the 60s there were projects to design and build a family of light destroyers with different versions for different roles, i.e. ASW, air defence, patrol. These grew into the DDL, which grew into a Daring replacement, dropping from ten additional hulls to three Daring replacements. They were cancelled and an initial two FFGs were ordered.
About the time the DDL grew into a destroyer replacement Australia invested in the Type 21 Amazon design as a potential low end complement to the DDGs, DDLs, and DEs but sitting above the Attack Class Patrol Boats. Again to increase numbers.
In the 90s the future fleet was pencilled in as three DDGs, six FFGs (tier 1) and eight ANZACs (tier 2), to be supported by a dozen corvettes (tier 3).
More recently (Rudd/Gillard) it was three Hobart's, six high end frigates to replace the ANZACs, and twenty multi role combatants (basically smaller, slower LCS).
I seriously hope the current review is looking at our geography and strategic environment. I suspect that if it is the surface fleet numbers will be shown, as they have every other time a serious review has been undertaken, to be woefully inadequate. We will be back to a mix of 20 to 30 destroyers, frigates and corvettes.