摘要：The following article presents researches aimed at the evaluation of precision in determining a ship's position through comparing a omnidirectional map image to a real vision image of the coast line. The first part establishes the thesis and preparatory forms in conducting the research. It also presents designed and built equipment including a research tool software. A system equipped with a spherical catadioptric camera that aids data collection on board ship designated to processing and analyzing data collected on board in connection with the spherical images of an electronic navigational chart with a software module. The second part explains procedures followed in conducting the research. The foreword note explains the procedure in data collec- tion aboard a ship maneuvering in the port after which the algorithm for position placement and precise parametrical count was presented. The concluding part shows analyses of obtained research result. It bears a performance on the evaluation of precision at determining position. As a measure, an average error value and distance fluctuation of obtained position from referential position. As our conclusion, primary agents having rudimentary influence on the quality of correlating spherical map image to coastline visual image were characterized
关键词：comparative navigation; Electronic Navigational Chart; spherical catadioptric camera system
