| 摘要 |
PURPOSE:To know a temperature gradient from the color of a displayed straight line even when the measured data are relatively less by displaying the straight line which connects respective spots where a measurement of water temperature is taken in color corresponding to temperature difference between respective spots. CONSTITUTION:A water temperature detector 4 detects the water temperature at the position of the ship mounting the detector and detected data is inputted to a CPU3 through an interface 5. The CPU3 relates and fetches data sent out of a navigation device 1 and the water temperature detector 4 and those data are sent to and stored in a memory 6. The CPU3 sends and stores position data on the ship and water temperature data at the position in the storage memory 6 at specific interval of time or every time the ship moves by specific distance on the basis of data inputted by a keyboard 7. The color display corresponding to the temperature differences is predetermined to know temperature variation, i.e. temperature gradient from the color of the straight light on a display device 9. |
