The Phalanx Close-In Weapon System (CIWS) has been providing the RAN with a short range anti-ship missile defence capability for over 25 years. SEA 1357 Phase 1 will upgrade the 9 Block 1A systems used by the Adelaide class frigates and the 3 Block 1B1 systems used by the Hobart class destroyers to the latest Block 1B2 configuration. This overhaul and upgrade is being undertaken by the Original Equipment Manufacturer (OEM), Raytheon Missiles System, under Foreign Military Sales (FMS) arrangements with the US Navy.

On 14 December 2018, Defence signed the Head Contract with ASC Shipbuilding Pty Ltd (now known as BAE Systems Maritime Australia, a subsidiary of BAE Systems Australia Ltd) to build the Hunter Class frigates (HCF) under Project SEA 5000 Phase 1.

On 20 June 2024, Defence amended and signed the Head Contract with BAE Systems Maritime Australia to include construction of the first 3 Hunter Class frigates.

SEA 1448 Phase 4B is replacing the SPS-49(V)8 Air Search Radar on the 8 Anzac class frigates with a modern phased array radar.

This project showcases Australian design and integration capability with the new Phased Array Radar technology designed by CEA Technologies in Canberra in conjunction with upgrades to combat systems performed by Saab Systems in South Australia and platform integration design by BAE Systems in Victoria.

Installation of this capability is being conducted during the Anzac Midlife Capability assurance Program (AMCAP).

SEA 1180 Phase 1 Offshore Patrol Vessels (OPV) will replace and improve upon the capability delivered by the thirteen Armidale Class Patrol Boats, by acquiring 12 new vessels. The primary role of the OPV will be to undertake constabulary missions and the OPV will be the primary ADF asset for maritime patrol and response duties. A Competitive Evaluation Process (CEP) commenced in late 2015 and concluded with the signing of a contract with Luerssen Australia on 31 January 2018.