This course comes from the experience of navigation and many years of practice operating at the Navimeteo centre, which every day provides support information to hundreds of boats and ship captains on the Mediterranean and on the Atlantic routes. The language and terminology used by seafarers is simple and essential. These basics are useful for anyone going at sea, whether browsing sailing or by motor boat. The aim is to make it more interesting and understandable to everyone, an important issue for security during navigation.The marine meteorology should be considered a mandatory equipment on board. I really hope that the advice and recommendations to predict weather at sea can help you choose the most favorable and secure route.