The steam plant for these ships consists of two Combustion Engineering boilers each equipped with a high-pressure (supercharger) forced draught air supply system, with a plant working pressure of 1,200 psi (8,300 kPa) and 1,000 °F (538 °C) superheat and rated at 35,000 shaft horsepower (26,000 kW) driving a Westinghouse geared turbine connected to a single screw.

[1][2] As built, they were equipped with one 5-inch (127 mm)/54 caliber Mark 42 gun forward, an eight-round ASROC launcher (with 16 missiles carried) abaft the gun and forward of the bridge, with four fixed 12.75 in (324 mm) Mark 32 anti-submarine torpedo tubes.

Following refits and a service life extensions costing some $14 million each, Ouellet and Truett were commissioned by the Royal Thai Navy as Phutthaloetla Naphalai (FFG-462) and Phutthayotfa Chulalok (FFG-461).

[6][1][2] In 2013, it was reported that the ships of this class would be retired, Phutthayotfa Chulalok in 2015, and Phutthaloetla Naphalai in 2017.

The ship subsequently underwent a US $14M refit at the Cascade General Shipyard, Portland, Oregon, and arrived in Thailand in 1998.