A Chinese woman was incapable of moving after a speedboat was hit by large waves in Krabi on Friday morning.
Officials of the Haad Nopparat Thara Mu Koh Phi Phi National Park rushed the woman, who is about 30, to the provincial hospital.
The boat left Haad Nopparat Thara Beach to take Chinese tourists to visit four small islands when it was hit by two- to three-metre waves.
The Chinese woman was sitting on the bow and the impact hurt her hip and back.