| 摘要 |
A system for providing advanced warning of underwater navigation hazards to fishing vessels is disclosed, The system comprises: an absolute position tracking system, e.g. GPS or Differential G.P.S.; a microprocessor arranged to receive data from the position tracking system and from a database of underwater obstacles, the microprocessor being programmed: (a) to calculate the speed of the vessel and its Course Made Good (CMG); (b) to define a zone around the vessel which constitutes an "alarm template" for generating an alarm whenever an obstacle is predicted to be present within that zone; (c) to search the database for obstacles located within a selected range from the vessel's position; (d) to generate data for displaying the vessel's position, the alarm template zone and any obstacles predicted to be present within the area to be displayed; (e) to initiate an alarm if any of the obstacles are predicted to be present within the alarm template zone; and (f) to refresh the generated display data by updating the database search in response to the calculated speed and CMG of the vessel; and a display device adapted to receive data from said microprocessor and to generate a screen display showing the vessel's position, the alarm template zone and any obstacles predicted to be present within the area of the display from said data. <IMAGE> |
