NEW! An eCompanion is now available to accompany the eBook for ESSENTIALS OF OCEANOGRAPHY, Sixth Edition. Students can carry this light-weight manual to class and use it to help synthesize their understanding of key concepts from the text. Features include Main Ideas, chapter summaries, Terms and Concepts to Remember, an interactive "Concept Check" section, review questions, and space for note-taking. A comprehensive study tool, the eCompanion assists in exam preparation, allows students to follow-along in class without the printed book or computer, and reinforces the concepts presented in the text.