The Standard Missile 6 (SM-6) is a long-range anti-air missile used by the Royal Australian Navy (RAN). It provides air defence against aircraft and missile threats at extended ranges. The SM-6 also provides anti-surface warfare and ballistic missile defence capabilities.

The United States developed the SM-6 as part of the Standard Missile family of weapons. In October 2024, the Australian Government announced the acquisition of the SM-6 and SM-2 Block IIIC from the United States to enhance the lethality and capability of RAN surface combatants. This followed HMAS Sydney’s successfully firing of the SM-6 in the vicinity of Hawaii, demonstrating the operational capability of both the ship and the missile.

The SM-6 augments the RAN's layered air and missile defence system. It operates alongside the Standard Missile 2 (SM-2) and the Evolved Sea Sparrow Missile (ESSM), increasing the range and depth of protection available to the surface combatant fleet. The SM-6 is employed on Hobart class Destroyers and will be integrated into the Hunter class Frigate.

Specifications 

• Function: Surface-to-air missile (primary role), surface-to-surface missile (alternate role)
• Manufacturer: RTX Corporation
• Guidance: Active and semi-active radar homing
• Weight: Approximately 1,500 kilograms
• Length: Approximately 6.6 metres
• Range: In excess of 240 kilometres
• Speed: Greater than Mach 3