| 摘要 |
<p>PURPOSE:To prevent confusion even if wakes cross over each other by representing an image of the other ship which is exhibited on a display of a radar and the like by means of triangles, quadrangles or the like. CONSTITUTION:A cursor on the faceplate of a braun tube 20 by the use of a mark position selecting device 21 is moved and conformed with the image of the other ship to measure. Next, a mark such as a quadrangle is selected by the use of a mark sort selecting switch 22, and the mark and its position are memorized in a first memory 30-1. Successively, positions and their mark sorts of plural ships are selected and memorized in memories 30-1-30-n. When a change-over switch 29 is changed to B, the data of the memories 30-1-30-n are shown on the faceplate of the braun tube 20 via a mark signal buffer 32. A first image 12 represents the position of a first ship by means of quadrangles, and a second image 13 represents the position of a second ship by means of triangles.</p> |
