The main issue is you never actually have 12 ships available at any one time,
At best you get 10 with 2 in Ship Maintance period, or Dry dock for upgrade,
When i can delete some of my old photos ill put up a brilliant one of 25% of the RAN surface Combatant fleet in FBE dry dock last year.
Then you count 1 is on deployment, 1 is getting ready to replace and 1 has returned in last few months, you get 3 more that are off task. So your looking at half the fleet laid up and thats without excercises and Local tasking(op resoloute from time to time, Long N, PWO week, FCP) so you start getting less flexible for emergencies or SAR. Count Bersama lima/shield, Talisman Sabre RIMPAC more and more ships are off the Australian station as well.
FBE every few weeks has 1 ship alongside as everyones out for one of the mentioned activities. thats out of 11 Major ships.
Next years plan is packed as its the 100th anniversary of RAN and all ships will be visiting major cities.:australia
In the future we will be seeing the FFH start Upgrade with new mast etc much like HMAS Perth, so looking at 6-9 mths per ship out, with 1 about to upgrade, 1 in dock and 1 starting work up, theres another 3 out of rotation, with FFG slowly starting to be worked to its last days for AWD replacement.
The more ships you have, the less sea time is required for each ship. Coming back from 6mth deployment we leave again start of next year for 5mths before then another 6mth deployment is on plan for end of year. For crew rest, courses, rotations etc that sucks. i planned 3 courses start of year that are now on hold till mid year, so we could use more ships.
As for manning, theres more people ashore then there needs to be, so lets drag some of those useless shorehuggers out to sea, you join the navy to go to sea, its that simple. :nutkick