| 摘要 |
PURPOSE:To read exactly fish school information by superposing and displaying the position information of a ship of a picture transmission side obtained by a position information means of the own ship, as a video based on a position of its vessel, on an underwater object video from a sonar device of the own ship. CONSTITUTION:By constituting a collision preventive device (ARPA) in an apparatus constitution extending from a radar use antenna 11 to a signal processing device and a radar video indicator 13, an output signal of the indicator 13 can output radar video information of a target, a moving speed and a moving direction, and a distance and an azimuth. By displaying them on a cathode ray tube 10 and obtaining position information of other ship, position information of a ship B against a ship A is obtained as an ARPA signal, in the ship A, and by a radio transmission from the ship B, a fish school video F and a position of the ships A, B can be superposed and displayed on a scanning sonar display machine, based on the ship A and the ship B, respectively, as a reference. In this way, position information of an underwater object can be obtained exactly. |
