[1] Seven Le Fier-class ships were laid down in 1939–1940 before the French surrender in 1940 stopped construction.

[1] Three La Siene 3-drum boilers generated steam at 3,400 kilopascals (500 psi) and 375 °F (191 °C) which was fed to Rateau-Bretagne geared steam turbines, rated at 23,000 kilowatts (30,800 shp) giving a speed of 33 knots (61 km/h; 38 mph).

290 tons of oil were carried, giving a range of 3,800 nautical miles (7,000 km; 4,400 mi) at a speed of 14 knots (26 km/h; 16 mph) and 900 nautical miles (1,700 km; 1,000 mi) at 33 knots.

[3] From 1959, the availability of US military aid resulted in the five ships that were still being built to be completed to a revised design as anti-submarine escorts, with a completely new armament and sensor outfit, while the four ships which had been delivered were refitted to the new standard.

[6][5] Displacement increased to 1,247 tonnes (1,227 long tons) standard and 1,570 tonnes (1,550 long tons) full load while speed dropped to 31.6 knots (58.5 km/h; 36.4 mph)[3][8] The revised ship's complement was recorded as 191 in 1971 and 199 in 1979.