Thailand, like most of S.E. Asia , get's two monsoons a year. Great for growing rice, but not much else. That two monsoon weather pattern is what made the Malay's the greatest sailors in the Indian Ocean in ancient and medieval times. Picking up spices in the islands near New Guinea and taking them to Somalia and Yemen to trade for gold, slaves, and incense.
The Greeks and Romans though their large outriggers were "rafts." The Portuguese couldn't believe the size of the Indian, Malay, and Muslim ships once they rounded the Cape of Good Hope and got into the Indian Ocean trading sphere.