Standard SM missile series

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The series of Standard missiles developed by the United States Navy were an evolutionary replacement for the "Three T's": RIM-2 Terrier, RIM-8 Talos, and RIM-24 Tartar of the 1950s, and continue themselves to evolve; SM-6 is in design. They are used by a number of navies.

Basic Standard missiles are antiaircraft weapons, which, depending on model and installation, may have a secondary anti-shipping missile capability. The RIM-161 Standard SM-3 is a ballistic missile defense weapon. On newer U.S. Navy vessels, the combination of SM-2 in anti-surface mode, along with helicopter-launched anti-shipping missiles, has replaced the AGM-84 Harpoon.

SM-1 missiles were intended to be fired from above-deck trainable rail launchers, rather like gun mounts, as were the Three T's. They came in medium range RIM-66 Standard SM-1 and long range RIM-67 Standard SM-1 versions. After SM-1, however, the missiles, from RIM-156 Standard SM-2, are intended for a vertical launch system.

Also with the SM-2 came the AEGIS battle management system, with shared AN/SPY-1 tracking/midcourse guidance radars and AN/SPG-62 terminal illuminator used by the semi-active radar homing receiver in the missile.

The RIM-161 Standard SM-3 was developed for ballistic missile defense, but has also demonstrated anti-satellite capability. It uses the additional AN/SPY-2 AEGIS radar.

There have been experimental air-launched and land attack versions (RGM-165 land attack Standard missile) that have not gone into deployment. An over-the-horizon version, the RIM-174 Standard SM-6,. however, is in active development.