Command and numbers
| Allocation | Attack submarines | Guided-missile submarines | Total |
|---|---|---|---|
| Eastern Submarine Command, Sydney | 24 | 6 | 30 |
| Western Submarine Command, Fremantle | 24 | 6 | 30 |
| National establishment | 48 | 12 | 60 |
The allocation develops the earlier 60-boat baseline without increasing it. Boats rotate through patrol, preparation and maintenance. A planning ten/ten/ten cycle per regional command gives a nominal twenty submarines deployed nationally, with actual readiness varying.
Mission
Attack submarines provide maritime reconnaissance, interdiction, anti-submarine operations and protection of carrier and national approaches. Guided-missile submarines concentrate conventional long-range strike and maritime interdiction. Special-purpose detachments support reconnaissance and appropriately authorised service tasks. Nuclear propulsion does not establish that every boat carries nuclear weapons; the independent strategic programme remains in the restricted annex.
Bases and forward support
Sydney and Fremantle host the principal command, nuclear engineering and deep-maintenance establishments. Jervis Bay supplies eastern training and concentration facilities. Singapore, Darwin, Port Moresby, Suva and agreed Vietnamese or Malaysian facilities provide appropriate logistics and forward support. These stations are not all reactor overhaul yards.
Development
The first national nuclear submarine entered service in 1966. Successive generations improved endurance, acoustic performance, sensors, computing, crew conditions and maintainability through continuing investment. The 2020 establishment continued as the organisational baseline in 2026, with replacement projects sustaining it. Exact hull names, pennants and class-by-class quantities require a separate ship register.
Sustainment
Qualified crews, shipyards, reactor supervision, rescue capability and reliable supply determine useful strength. Technical colleges, universities, manufacturers and the intelligence network support the fleet. Long maintenance periods and training requirements remain part of the record rather than being hidden by the headline inventory.