NAVIGATION ASSISTANCE METHOD, NAVIGATION ASSISTANCE DEVICE, AND NAVIGATION ASSISTANCE PROGRAM

A navigation support device (1): stores performance estimation models regarding speed of a vessel for each of vessel maneuvering patterns; accepts one of the vessel maneuvering patterns to be used in a navigation; calculates the speed of the vessel on a route, based on one of the performance estimation models that corresponds to the accepted one of the vessel maneuvering patterns among the performance estimation models, and meteorological and hydrographic forecast data; and displays an arrival time on the route that is optimal, based on the speed of the vessel that has been calculated, thereby being able to present an accurate optimal route according to the vessel maneuvering pattern.