| Summary: | 碩士 === 國立臺灣海洋大學 === 通訊與導航工程學系 === 104 === Navigation Safety is an important issue when ships are sailing on the sea, While a safety anchorage is necessary when anchoring a ship.
This research uses trajectory data of ships collected Automatic Identification System(AIS), detects whether ships inside and outside anchoring area are in anchoring states through ratio determination method, NonSimple determination method, and convexhull cross-determination method respectively, and furthermore analyzes the the true positive rate, false positive rate of each method for anchoring detection and true negative rate, false negative rate of each method for non-anchoring detection.
The alert zone for drift anchor is then acquired by comparing ship’s position distances detected by above three methods and the anchoring radius proposed in the literature.
Finally, results of the research are ready to be applied to a real-time detection and monitoring function of anchoring ships.
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