on order with 20 being planned total Uruguay (National Navy of Uruguay) Uruguay class - 3 ships Venezuela (Bolivarian Armada of Venezuela) Mariscal Sucre class - 6 ships (ex-Italian Lupo class) Vietnam (Vietnamese People's Navy) - 1 ship (ex-seaplane tender) Petya class - 5 ships Dinh Tien Hoang class - 4 ships in service (2 on order) Yugoslavia SFR Yugoslav Navy Koni class - 2 ships Kotor class - 2 ships See also List of frigate classes List of corvette classes References Country