CONTENTS: 1. Introduction to Oceanography 2. Expeditions of Ocean in National and International 3. Earth and its Interior 4. Theories of Ocean Formation 5. Major Oceans in the World 6. Relief of Ocean Floor 7. Relief of Indian Ocean 8. Ocean Waves 9. Ocean wave theories 10. Ocean Tides 11. Ocean Currents 12. Ocean Currents of the World 13. El- nino 14. Physical Properties of Seawater 15. Properties of Sea Ice and Transmission of Sound 16. Distribution of Temperature in Seawater 17. Distribution of Salinity in Seawater 18. Distribution of Density in Seawater 19. T-S Diagram 20. Water mass in Indian Ocean 21. Chemistry of seawater 22. Nutrients in Seawater 23. Trace Elements of Seawater 24. Dissolved Gases in Seawater 25. Marine Sediments