Royal Thai Navy Day in Thailand
Royal Thai Navy Day in Thailand is held on November 20. This event in the second decade of the month November is annual. 
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The Royal Thai Navy, Thailand's naval warfare force, was established in 1906. It was modernised by the Admiral Prince Abhakara Kiartiwongse (1880–1923) who is known as the father of the Royal Navy. It has a structure that includes the naval fleet, Royal Thai Marine Corps, and Air and Coastal Defence Command. The RTN headquarters is at Sattahip Naval Base.
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