This is an introduction to the sciences of oceanography and meteorology. The use of astronomy to navigate was complimented by the use of the magnetic compass and the sextant and then by satellite navigation techniques. The seafarer's knowledge about wind and ocean currents and the sea-floor gradually developed into the sciences of oceanography and meteorology. This book is as good as a textbook for years 11, 12 and first year university as it is for general interest. The coverage is broad from hurricanes to Stevenson Screens, from marine sediments to tsunamis all with the emphasis on scientific method. The history and historical figures involved are intertwined