Naresuan-class frigate

	HTMS Naresuan (FFG 421)
Class overview
Builders	China State Shipbuilding Corporation, Shanghai
Operators	Royal Thai Navy
Preceded by	Phutthayotfa Chulalok class
Succeeded by	Bhumibol Adulyadej class
Subclasses	Type 053 frigate
Built	1991–1995
In commission	1994–present
Completed	2
Active	2
General characteristics
Type	Frigate
Displacement	2,985 tons full load
Length	120.5 m
Beam	13.7 m
Draught	6 m
Propulsion	2 × General Electric LM2500 gas turbines and ; 2 × MTU 20V1163 TB83 diesel engines, ; driving two shafts with controllable pitch propellers in CODOG configuration;
Speed	32 knots (59 km/h) max
Range	4000 nmi (7408 km) at 18 kn
Complement	150
Sensors &; processing systems	Saab Sea Giraffe AMD 3D surveillance radar; Thales LW08 long range search radar; Raytheon AN/SPS-64 Navigation radar; Selex IFF SIT422CI&M425; Saab 9LV Mk 4 with Saab TIDLS combat management system; 2 × Saab CEROS 200 Fire Control Radar; Atlas DSQS-24d sonar;
Electronic warfare; & decoys	ESM ITT ES-3601 (AN/SLQ-4); ECM Type 984-1 noise jammer & Type 981-3 deception jammer; Decoys Terma SKWS (C-Guard);
Armament	1 × 5 in/54 (127 mm) Mk 45 Mod 2 naval gun; 2 × 30mm MSI-DSL DS30MR automated small calibre gun; 8 cell Mk.41 VLS for 32 x RIM-162 ESSM; 8 × RGM-84 Harpoon SSM launcher; 2 × Triple Mark 32 Mod 5 torpedo tubes;
Aircraft carried	1 × Super Lynx 300

The Naresuan-class frigate (Thai: ชุดเรือหลวงนเรศวร) is an enlarged modified version of the Chinese-made Type 053 frigate with Western weaponry, cooperatively designed by the Royal Thai Navy and China but built by the China State Shipbuilding Corporation in Shanghai. The ships came at 2 billion baht each, less than the 8 billion baht claimed price tag for Western-built frigates.

Upon delivery, the Royal Thai Navy complained of the poor quality of the ships. The damage control system was very limited, with very basic fire suppression systems. It was claimed that if the ships’ hulls were breached, they would quickly be lost to flooding. The Thai Navy had to spend considerable time and effort to correct these issues.