The RIM-67 Standard ER (SM-1ER/SM-2ER) is an extended range surface-to-air missile (SAM) with a secondary anti-ship capability, originally developed for the United States Navy (USN).

[citation needed] Terrier ships reequipped as part of the New Threat Upgrade were refit to operate the RIM-67B (SM-2ER Block I) missile.

[citation needed] The RIM-156A Standard SM-2ER Block IV with the Mk 72 booster was developed to compensate for the lack of a long range SAM for the Ticonderoga class of Aegis cruisers.

[5] During the Iran–Iraq War (1980–1988) the United States deployed Standard missiles to protect its navy, as well as other ships in the Persian Gulf from the threat of Iranian attacks.

According to the Iranian Air Force, its F-4 Phantom IIs were engaged by SM-2ERs but managed to evade them, with one aircraft sustaining non-fatal damage due to shrapnel.

[6] During the same war the United States Navy mistakenly shot down an Iranian civilian airliner, Iran Air Flight 655 using two SM-2 missiles.