This full-color, extensively illustrated revision of a highly respected dive manual includes the information necessary to learn open water diving. Timely discussion include ecology and scuba techniques, equipment and safety materials, women's diving issues and concerns, expanded CPR information, air sharing and hand signals.

This bestselling, full-color manual includes thoroughly updated coverage of all aspects of sports diving, including equipment, safety, and diving tecnhiques. Current diving standards are reflected in its discussions on beach diving, computer equipment, CPR, diving accident management, and mixed-gas diving.

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.