Cold water diving is more gear-intensive than warm water diving, but the diversity of marine life and panoramic beauty of the world below the water line are a delight to explore. Try the shallow waters of BC's Hornby Island for a cold water shark dive where spiny dogfish zip around like short fused rockets and you have a good chance of spotting a blunt nosed six-gill shark. Or visit Sound Rock in Washington State, a marine protected area sheltering wolf eels, sea whip beds, various shrimps and crabs and the occasional wandering giant Pacific octopus. When it comes to quality and quantity of wrecks to explore, the Northwest is a diver's playground with warships, cargo ships, and wooden ships dating back to the 1800s. Diving is not limited to coastal areas either, with Montana and Idaho offering opportunities for freshwater adventures just watch out for the 30 to 40-foot Mackinaw Ness Monster! In this guide, master scuba dive instructor and Northwest diving tour guide Mike Hughes shares over three hundred dive sites in BC, Washington, Oregon, Idaho and Montana, including drift dives, wall dives, freshwater dives and wrecks festooned in plumrose anemones and patrolled by huge rockfish. With training tips and gear appropriate to cold water diving, indispensable information on local dive operators and shops, and useful dry land advice such as where to go for a meal after the dive plus nearby attractions for non diving travelling companions this guide is sure to enhance the enjoyment and safety of recreational divers in the Northwest, whether they've logged hundreds of hours underwater, or they're just getting started.
Many people think that space is our final frontier - and that is not entirely true. While it is more difficult to get to outer space, we probably know more about the various planets and environments in space than we do about what lies beneath the surface of our oceans.
Professor Yurii A. Anan'ev has a long-standing international reputation for his publications on optical beams and resonators. Now many of his contributions will be readily available for the first time in a book. The generation of maximum power, minimum divergence beams from laser resonators is probably the most important topic in quantum electronics and optics today. The only book of its kind, Laser Resonators and the Beam Divergence Problem covers not only the theory, but also the applications of resonators to real systems as opposed to idealized models. Each rigorous examination of an optical configuration is accompanied by a detailed discussion of its associated applications and of the considerations for the user in practical work. The book contains a wealth of information on the developments in resonator technology, including much material previously unavailable outside the Soviet Union. It is an essential reference source to every researcher in laser science and technology.
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