Reliable Floating Dock. From our domestic client: We chose Potona Marine as our marina constructor through tender in 2011. Owing to being located in Sanya and frequent typhoons at 15-16 magnitude, we were quite worried about the safety of floating dock. But through technical communication, they offered very professional advice and detailed technical documents. Up till now, we have experienced dozens of typhoons over 12 magnitude and they are still there without any problem. We are relieved to their reliable performance.