OHPs were tough nuts to crack
During RIMPAC 2016 the Navy and her allies conducted two SINKEXs, both on retired Oliver Hazard Perry-class frigates. Stripping the ships of combustibles, polychlorinated biphenyls (PCBs), transformers and large capacitors, trash, floatable materials, mercury or fluorocarbon-containing materials, readily detachable solid PCB items and useful items such as 20mm Phalanx CIWS mounts (though not the Mk 75 76mm guns which the Navy and Coast Guard are retiring) they were sent to the deep after a lot of munitions were poured on them.
The first, ex-USS Thach (FFG-43) withstood a tremendous amount of damage from Harpoon anti-ship missiles launched from Australian P-3 Orions and the cruiser USS Princeton (CG 59) before taking torpedo hits from a submarine at periscope depth.
Then, in the below video, the decommissioned ex-USS Crommelin (FFG 37) just gets pounded mercilessly by live fire from ships and planes on 19 July, 60 miles north of Kauai, Hawaii.
It takes a lot to put her down.
It should be noted that two of their sisters, USS Samuel B. Roberts and USS Stark, both withstood terrific damage from a floating sea mine and surface to air missiles respectively in the Persian Gulf during the 1980s.