Note:
(a) Oliver Hazard Perry-class frigate https://en.wikipedia.org/wiki/Oliver_Hazard_Perry-class_frigate
(Built 1975–2004; In commission 1977– present; Completed 71; general-purpose escort vessels inexpensive enough to be bought in large quantities to replace World War II-era destroyers and complement 1960s-era Knox-class frigates)
(b) 濟陽級巡防艦 (台灣買8艘, arriving in Taiwan 1992- 1998?; 以專業反潛艦為設計導向的艦艇，不可避免地得犧牲掉一些功能，尤其防空武力為甚，僅有一門Mk-42艦砲與一門MK-15 方陣近迫武器系統充當自衛之用; 中華民國海軍計畫逐步汰除濟陽級巡防艦; named after 山東省濟南市濟陽縣)
(c) AN/SQR-19 and -18 are towed array sonars. I do not know what AN/SQR stands for, despite yearlong effort.