According to information published by Defence Studies on March, 29, 2021, the Royal Thai Navy conducted a historic firing of Harpoon Block 1C, defining a firing area in the Andaman Sea about 130 nautical miles west of Phuket (or approximately 240 kilometers) missile fired at a distance of 55 nautical miles, or about 100 kilometers.
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| Firing of Harpoon Block 1C missile from HMTS Taksin 422 (Picture source: Royal Thai Navy) |

