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PATTANI (511) class

Country of Origin: Thailand

ship list


 Name          Pendant    Launched          Commissioned      Status
 PATTANI       511        Sept. 19, 2004    Dec. 16, 2005     Active
 NARATHIWAT    512        March 2005        April 24, 2006    Active


These Chinese-built offshore patrol vessels were ordered on Dec. 20, 2002, to Thai specifications. An option for two more has not been exercised.

The ships are named after two of the southernmost provinces in Thailand.


Both ships are active.


 Hudong Shipyard, Shanghai, China


 Displacement:       1,321 tons standard
                     1,463 tons full load
      length         313 ft 4 in (95.50 m) overall
      beam            38 ft 1 in (11.60 m)
      draft           10 ft 2 in ( 3.10 m) maximum
 Propulsion:         2 Ruston type diesels; 15,660 total
                       bhp; 2 controllable pitch propellers
      speed          25 knots
      range          3,500 nm at 15 knots
 Manning:            78 total (18 off. + 60 enl.)
 Combat Systems:
      guns           1 76-mm/62-cal. Compact SR DP
                     1 twin 23-mm AA
      radars         3 navigation
                     1 Oerlikon/Contraves TMX fire control

issues and notes


operational notes

On Sept. 10, 2010, HTMS PATTANI and HTMS SIMILAN , a replenishment oiler, left Chuk Samet port at Chon Buri's Sattahip naval base to join a 28-country effort against piracy off the Somali coast. It represented the first time that Thailand had sent its forces overseas to protect its interests, as the Bangkok Post reported at the time. They both returned in January 2011 after 137 days of patrolling the Gulf of Aden.

Combined Task Force 151, in October of 2010, reported that PATTANI and SIMILAN had recently disrupted pirate activities in the Gulf of Aden, improving regional maritime security and protecting legitimate merchant vessels in the area. The two vessels had left

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