| 摘要 |
PURPOSE:To determine a route to be considered most optimum, by providing a navigation computing device, a route analyzing device, and the like, obtaining a route plan from one of a plurality of navigation methods, partially computing the route plan again so as to correct the plan, thereby combining a plurality of the navigation method. CONSTITUTION:A plurality of route plans are computed by a navigation computing device 12 by using one of a Mercator sailing, a great circle sailing, a composite great circle sailing, or a shortest-distance roundabout sailing based on starting and arriving points of a ship. In a route editing device 11, the route plan can be set by using the Mercator latitude navigation method. Furthermore, the route plan including the route plane computed by the device 12 is partially corrected. When the route plan is not adequate, the route plan is computed again by the device 12 or device 11. When an adequate scheduled route is determined based on these route plans, the data is sent to a route keeping device 14. Thus a plurality of navigation methods are combined, and one route plan can be obtained. |
