TABLE OF CONTENTS 



Page 



GEOLOGICAL OCEANOGRAPHY 



Historical Development 1 



Continental Shelf 2 



Continental Slope 3 



The Deep-Ocean Floor 3 



Sediments on the Ocean Floor 5 



Magnetic Measurements 6 



Gravity Measurements 6 



Seismic Measurements 6 



Heat Flow Measurements "^ 



Conclusion 7 



OCEAN WAVES 



The Surface of the Sea is a Mess 9 



The Family Tree of Ocean Waves 10 



Birth and Development of Wind Waves , 11 



Wind Waves Limited by Blowing Their Tops 11 



The Energy Spectrum of the Sea 12 



Spectral Filters and Wave Forecasts 13 



Lots of New Ways to Measure Waves 14 



To All Thing There Comes a Time 15 



SURVIVAL AT SEA 



Pre- Abandonment 18 



Abandoning Ships 18 



Use of Clothing as a Floating Aid 19 



Swimming 19 



Life Craft and Survival 19 



Food 20 



Indications of Land 21 



Rescue Tips 21 



Man Overboard 22 



Sharks 24 



NAVIGATIONAL HINTS 



Introduction 25 



Depths— Shoals— Currents 25 



Echo-Sounding 26 



Night Vision Horizon 26 



Sight Error Compensation 26 



Latitude by Meridian Altitude Below the Pole 27 



