Abstract:In order to improve the accuracy of ship draught measurement , a high-precision ship draught monitoring system based on STC8A8K+MS5837 was developed. According to the relationship between liquid pressure and depth, a high-precision pressure sensor MS5837 was applied to solve the problem of low accuracy in this system. Besides, the draught data is transmitted from the microcontroller STC8A8K to the host computer,which can display real-time data on the LCD screen and save the data for subsequent research. Field experiments demonstrate the system’s measurement accuracy can reach 0.1mm with real-time performance, and it can be easily installed on ship.