Weather4D Routing & Navigation is a powerful application based on weather and ocean forecast files in GRIB format. It displays 3D weather forecasts in one or two screens with an extremely smooth temporal animation. Many models of weather and ocean forecasts are available, and requests and downloads are fully customizable. Weather4D Routing & Navigatione displays the combined data as layers. All the data of a selected model is displayed by an animation in continuous time scrolling or in manual scrolling on the chart. The routing module allows to optimize sailing, boating, or mixed sail-motor routes. From a theoretical route, a motor routing will take into account current forecasts, and also wind force and wave height constraints for optimization of comfort and safety. In sailing, a polar speed combined with wind and current forecasts will be used for optimization of performance and safety. Multi-routing allows you to compare the results of different options: prediction models, departure dates and times, selected constraint values. Weather4D Routing & Navigation helps prepare and track navigation on a wide range of official marine charts issued from many countries hydrographic services. Stay connected with navigation devices to receive NMEA data as AIS targets, sensors, GPS, and to control your autopilot. This multimedia manual is the complete user guide for the Weather4D Routing & Navigation app available on the Apple AppStore. It is to download for the attention of application users. - 202 pages - 120 graphics - 44 videos