| 摘要 |
<p>PROBLEM TO BE SOLVED: To display the echo signals from the same target at the same position in distance/azimuth format of respective buoy when the echo signals received by two or more active buoys are displayed in distance/azimuth format, respectively. SOLUTION: At a signal detecting/processing part 1, a relative distance and relative azimuth viewed from a buoy are calculated from the echo signal received by the buoy. Meanwhile, into a buoy position input part 2, the position of the buoy except for a reference buoy is inputted as X and Y components of an orthogonal coordinate by an operator with a pre-set reference buoy as an origin. At a coordinate converting/processing part 3, the calculate relative distance are relative azimuth are converted into the X and Y components of an orthogonal coordinate with the reference buoy as the origin based on the buoy position information inputted from the buoy position inputted part 2. At a distance/azimuth calculating part 4. The X and Y components of the orthogonal coordinate with the reference buoy as the origin are converted to a distance/azimuth format for outputting to a display device.</p> |
