I think that the RAN's type 12s could have been better modernized in the late 1970s - and here is how.
The only way I can see the RAN's Type 12s getting a better SAM system is either to mount a Sea Sparrow launcher atop the aft superstructure (in place of the Seacat) or to get the UK to go ahead with the 3-shot Sea Wolf launcher that had been intended to replace the Seacat 4-shot launcher 1-for-1 (not likely). A helo spot could be fitted if the Limbo is removed (as per Yarra in 1979-80) and a USN frigate-hangar (moderately short with a telescoping section that retracts into the fixed part of the hangar and is extended out when the helicopter is to be worked on or for inclement weather) could be fitted in place of the aft end of the superstructure (the spaces displaced could be fitted along the sides of the superstructure abreast of the funnel).
The helo for these modernized ships would have to be Lynx HAS.2s (deliveries from 1977 for the RN and other customers), with upgrades until the ships were decommissioned.
See this photo of HMS Yarra in 1984 to get the idea of my proposed modernization (the other 3 older ships would be the same):
[ATTACH=full]727526[/ATTACH]
Swan & Torrens would be similar:
[ATTACH=full]727527[/ATTACH]
Here is the RAN's Ikara layout:
[ATTACH=full]727528[/ATTACH]
[ATTACH=full]727529[/ATTACH]
USN small frigate hangar:
[ATTACH=full]727530[/ATTACH]
[ATTACH=full]727531[/ATTACH]
