| 摘要 |
PURPOSE:To enable the impages of the present position and the past wake to be overlapped with each other when displayed, by providing memories to store the present position data and the past wake respectively. CONSTITUTION:The ship's own present position based on the data from a sensor can be displayed on a CRT5, and also the wake can be displayed simultaneously. Moreover, by transferring the stored data in a memoy 4 which stores the past wake to a buffer memory 7, the past wake can be displayed on the CRT5. In addition, by integrally transferring the stored data in a memory 3 which successively stores present position data and that in the memory 4 to the memory 7, the past wake and the present position or the like can be simultaneously displayed. |
