Charts. Siam, Gulf of. Gulf of Siam, Siam and French Indo-Chlna, Cape Liant (Lem Samesan) to Kut Island, from latest British and Siamese surveys; with inset, Chandaburi (Chentabun) River, from Siamese survey in 1912 and 1913; chart 3137. Scale naut. m.=1.22 in.