sentences:  With an area of , it is the twelfth-largest naturally-occurring Spratly island, and the fifth-largest among the Vietnamese-administered islands.The island is also claimed by China, the Philippines and Taiwan.Although two South Vietnamese warships (the HQ-04 "Tuy Dong" and HQ-05 "Tay Ket") stopped at Namyit Island in 1962, South Vietnamese troops did not set up a permanent garrison on the islet until August 1973.