This system purports to encourage people to salvage vessels, cargoes on board and lives in the perils of the sea so that the safety of navigation can be maintained.
创立该制度的目的是为了鼓励人们冒着风险对遇难船舶和货物或人命进行救助，以维护海上航行的安全。
2
Experiments have shown that the system can extract landmarks stably, achieve high accuracy rate of place recognition and guarantee safetynavigation in unknown environments for mobile robot.
实验结果表明该系统路标提取稳定、位置识别率高、定位精确，能够保证机器人在未知环境中的安全导航。
3
The system designed in the paper has been used in the subject for National WEST development-han River NavigationSafety Information system, supported by the Ministry of Communications of China.