1. Introduction. References. 2. Marine Hard Mineral Resources. Introduction. Physiographic provinces of the ocean floor. Marine Hard Mineral Occurrences. References. 3. Research Vessels and Submersibles. Introduction. Statistics of research vessels and submersibles. Requirements of research vessels. Navigation systems. Examples of ocean research vessels and submersibles. References. 4. Marine Geophysical Exploration Techniques. Introduction. Acoustic surveying techniques. Seismic exploration methods. Marine gravity measurements. Marine magnetics. Heatflow measurements. Visual inspection of the seafloor. References. 5. Marine Geochemical Exploration Methods. Introduction. Marine exploration sampling devices. Analytical methods in marine mineral exploration. Geochemical exploration examples. References. 6. Data Evaluation of Exploration Surveys. Introduction. Data collection and storage. Data structure analysis. Data representation. Data interpretation. Conclusion. References. 7. Marine Mineral Exploration Examples. Introduction. Metalliferous sediments: The Red Sea. Massive sulfides at the East Pacific Rise. Deep-sea manganese nodules in the equatorial Pacific. Cobalt-rich crusts of Pacific seamounts. Phosphorite concretions off New Zealand. References. 8. Legal Aspects of Marine Mineral Exploration. Introduction. Areas within national jurisdiction. The area beyond the limits of national jurisdiction. Conclusion and prospect. References. Appendices. Index.