Since living memory the shipping business relies on weather information for route planning and for the scheduling of individual passages and journeys. The basis for this planning are climatologic consolidated findings for winds and currents on the one hand and on the other hand particular forecasts for swell, wave height, wind speed, and wind direction. The company ask has developed interactive sea-weather maps for the shipping business. They allow the user by Internet technology to quickly get an overview over the weather situation and provide the possibility to interactively zoom to get more detailed information on the sea areas in question.