Revision of California SeaGrant 1986 book, "Blue Water Diving Guidelines" to include updated information on equipment and procedures.

Learn the secrets of spearfishing and underwater photography from some of the best freedivers around the world. National champion and world-record holder Terry Maas profiles twelve bluewater species from tuna to marlin, and sailfish to wahoo. Loaded with practical suggestions, this book is a must for anyone interested in freediving or spearfishing.

This updated and revised second edition of John Heine's Scientific Diving Techniques covers the details of research methods underwater. Included are general scientific diving guidelines, an overview of aquatic habits and ecosystems, specialized diving equipment and procedures, locating and marking study sites, archaeology, measuring physical and biological factors, underwater experimentation and underwater photographing and videography for the scientist. There are over 500 references to original scientific techniques. Also included are training exercises to aid Diving Safety Officers in training scientific divers.

Provides a comprehensive overview of the U.S. coal industry over 20 years, with emphasis on the major changes that occurred, their causes, and their effects. Presents and analyzes data in terms of trends in production, consumption, distribution, and prices. Profitability of major energy companies' coal operations is also tracked. Over 100 charts, tables, graphs and photos.