As a new concept of high-speed marine transportation, the Techno Super Liner has already reached the practical stage of operations beyond the experimental stage. When even the TSL approaches the wharf, the motion of a ship relative to the wharfis confirmed directly by the human eyes in any weather conditions.
　To improve the safety and effeciency of such berthing operation, we developed the support system using RTK/OTF GPS (Real Time Kinematic/On The Fly Global Postioning System). The RTK/OTF GPS can provide the position with accuracy of a few centimeters in real time.
　Two RTK/OTF GPS systems were installed on the experimental high-speed ship, 'Hisho',and the effectiveness of the support system was verified for actual berthing operations.