The Santa Maria class of frigates are the Spanish Navy's designation for six locally-built warships based on the United States Oliver Hazard Perry-class frigates. Built in two batches, the second batch units (F-85&86) received some improvements, such as an improved combat-data system, updated SPS-49 and SQR-19 sets, and a new Meroka mount. The Mk92 Mod 6 CORT replaced the previous Mod 4, providing better capabilities against sea skimming missiles. The electronic warfare suite was also updated.