Book excerpt: From John C. Payne, one of the foremost international authorities on marine electrical systems and electronics, comes a new title in his successful series of easy to understand yet thorough treatments of technical issues facing every boat owner, whether sail or power. Each volume is concise, compact, and fully illustrated for easy reference. Understanding Boat Refrigeration and Air Conditioning Systems covers the following major topics: Part I Refrigeration Systems Eutetic Refrigeration Systems Compressors and Motors Auxiliary Refrigeration Systems Hermetic Compressors Troubleshooting Part II Air Conditioning Systems Self-contained and Remote Condensing Systems Electrical Power Requirements Maintenance Troubleshooting