One enemy spy knows the secret of the Allies' greatest deception, a brilliant aristocrat and ruthless assassin - code name: "The Needle" - who holds the key to the ultimate Nazi victory. Only one person stands in his way: a lonely Englishwoman on an isolated island, who is coming to love the killer who has mysteriously entered her life. Ken Follett's unsurpassed and unforgettable masterwork of suspense, intrigue, and dangerous machinations of the human heart.

To stop or not. This book is the third book in the diving series after The Art of Gas Blending, Dive Computers and before Diving Below 130 Feet, and looks at what 'Deep Stops' actually are, and how these stops are calculated and used today. This book looks at the research done and current understandings of deep stops, both for and against. The book’s aim is not to advocate or discredit the use of deep stops, but rather to be neutral and provide the reader with the most up to date knowledge, research and methods used by various groups, from military to recreational and technical diving, and how each has changed their diving due to their research. Some of the topics covered are: • Safety stops and their role in diving • Ascent speed and how it affects your decompression • Descent speed and how it affects your decompresion • Oxygen window • Gradient Factors, in-depth explanation with example calculations and formulas • Different kinds of deep stops • How long to stop for • Research done on deep stops • Micro bubbles • Diffusion speed and solubility • How bubbles form • Tribonucleation • Thermal change during diving and decompression • Exercise and diving • Body’s reaction to bubbles • Blood complement activation • Smoking, fat, alcohol and Yo-Yo diving, their role in decompression • Different algorithms

This is the first book in the diving series, followed by Dive Computers, Deep and Safety Stops, Including Ascent Rate and Gradient Factors, and Diving Below 130 Feet. This is an excellent must have book for any gas blender, Technical diver or person interested in technical diving. Whether you intend to blend gas or not. Even people that are already gas blenders will find great value from the tips and advice in this book. Alternatively, a new way of explaining things might just be what is needed to help you understand how gas blending works. The book starts off with an explanation and look at the gasses you will use for deep diving and decompression such as Enriched Air, Tri-Mix, Heliox, Helair, in addition to looking at narcosis, CO2 and CO poiseing and ICDS. Gas blending is covered with examples from the basic formulas for enriched air blending to Tri-Mix and Helair that includes topping of a mix, changing a blend, blending with impure helium (helium that has oxygen mixed in it), to formulas on working out the actual breathing mix in a rebreather loop at any depth at any PPO2, to what would be the appropriate mix to bailout to at any depth. As a diver, by understanding how a blend will change when it is topped of with air or another gas, can allow you to plan your diving better and resuse gasses for other dives instead of it being drained down and wasted. In addition is included charts for filling: Nitrox Mixes for 22 to 50% in 1% increment, 50 to 95% in 5% increments 100 to 4000 psi in 100 psi increments and 20 to 300 bar in 20 bar increments Helair Mixes for 1/95: 2/90: 3/85: 4/80: 5/75: 6/70: 7/65: 8/60: 9/55: 10/50: 11/45 12/40: 13/35: 15/30: 16/25: 17/20: 18/15: 19/10: 20/5 250 to 3500 psi in 250 psi increments and 20 to 320 bar in 20 bar increments. Tri-mix Mixes for 8/80: 9/75: 10/65: 10/80: 12/55: 12/75: 13/70: 14/44: 14/65: 16/55: 18/35: 18/40: 20/40: 20/35: 24/30: 32/20: 40/20: 50/20: 60/20 250 to 3500 psi in 250 psi increments and 20 to 300 bar in 20 bar increments. EAD (Equivalent air depth) charts for Mixes 22 to 40% in 1% increments, 40 to 60% in 5% increments 40 To 180 Feet in 5 Feet increments. 15 to 30 meters in 1 meter increments. 32 to 56 meters in 2 meter increments. END (Equivalent narcotic depth) and best gas chart for Feet: Best gas for PPO2 1; 1.3; 1.4; 1.5; 1.6 Best gas for END of 100 FT @ PPO2 1; 1.3; 1.4; 1,6 Best Gas for END of 130 FT @ PPO2 1; 1.3; 1.4; 1,6 Depths covered 60 to 220 feet in 10 feet increments, 240 to 300 in 20 feet increments, 330, 350 370, 400, 425, 440, 460, 480, 500 feet. Meters: Best gas for PPO2 1; 1.3; 1.4; 1.5; 1.6 Best gas for END of 30 M @ PPO2 1; 1.3; 1.4; 1,6 Best Gas for END of 39 M @ PPO2 1; 1.3; 1.4; 1,6 Depths covered 18 to 66 Meters in 3 meter increments, 72, 78, 84, 90, 100, 106, 112, 121, 129, 133, 139, 145, 152 meters. Blending gas in ways you did not know you could do

One diver, after a seemingly brief period below the surface, discovers that his gas supply has run perilously low. Another, paralyzed, bobs helplessly on the surface, and when a poorly trained divemaster attempts rescue, things go from bad to worse. Two other divers, fascinated by the bountiful undersea life of the Caribbean, fail to notice that a powerful current is sweeping them rapidly away from their unattended boat. These are just a few of the true stories you’ll find in Diver Down, most of them involving diver error and resulting in serious injury or death. Each of these tales is accompanied by an in-depth analysis of what went wrong and how you can recognize, avoid, and respond to similar underwater calamities. This unique survival guide explores the gamut of diving situations, including cave and wreck diving, deep-water dives, river and drift diving, decompression sickness, and much more. It shows you how to prevent tragic mishaps through: Inspection and maintenance of primary and secondary diving gear Learning and following established safety protocols Confirming the training and credentials of diving professionals Practicing emergency responses under real-world conditions

The earth’s oceans hold many wondrous surprises—be they the small, colorful “critters” off the coast of Papua New Guinea, opportunistic red demon squids in the Sea of Cortes, or naval wrecks in the lagoon of Bikini Atoll. In Fifty Places to Dive Before You Die Chris Santella has invited diving experts from around the world to share some of their favorite destinations, so ardent divers can experience these underwater wonders for themselves—either on location in their SCUBA gear, or at home in their armchair. The fifth in Santella’s bestselling “Fifty Places” series, the book takes divers from hot-spot destinations like Raja Ampat (off the coast of West Guinea) to old Caribbean favorites like Grand Cayman Isles. Readers will swim among whale sharks off Myanmar, befriend wolf eels off the coast of Maine, and marvel at the giant mola mola of Lembognan, Indonesia. These wonderful creatures—plus the brilliant coral reefs that often provide their backdrop—are captured in 40 gorgeous color photos from the world’s greatest underwater photographers. And for readers who want to travel to these breathtaking locales, Santella provides complete “If You Go” suggestions to help you plan your trip.

This guide covers essential diving skills, using diving equipment in both warm and cold water, and avoiding the risks and hazards associated with diving. It also looks at advances in diving medicine, diving equipment and dive-planning devices.

Is the first comprehensive manual that teaches how to hold the breath, stay underwater longer, and descend deeper into the blue. The book includes a history of freediving, and detailed drawings of underwater exercises, finning techniques and selected Yoga postures to enhance lung capacity. This book is highly recommended to Skin-divers, Scuba-Divers and Surfers. It teaches how to hold the breath longer under water.

Finally, a comprehensive fish identification guide covering the fish-rich reefs of the Pacific. It contains 2,500 underwater photographs of 2,000 species from four of the best marine life authors/photographers in the business. Their collaboration makes it possible for underwater naturalists to identify fishes from Thailand to Tahiti with a single, compact, easy-to-use, no-nonsense reference. 108 fish families are presented in one of 20 Identification groups based on a family's related visual or behavioural characteristics, such as Large Oval / Colourful or Sand/Burrow Dwellers. Likewise, every effort has been made to group similar appearing species together.

This title contains 3 books in slipcase. It includes copies of "Reef Fish Identification: Florida, Caribbean&Bahamas" (3rd Edition), "Reef Creature Identification: Florida, Caribbean&Bahamas" (2nd Edition) and "Reef Coral Identification: Florida, Caribbean&Bahamas" (2nd Edition) packaged in a beautifully printed shelf case.