Our checkout dive was easy, with a maximum depth of 75 feet for 50 minutes. The current was slight, and the visibility was spectacular — an ideal first dive. It closed with a nice, slow ascent and a three-minute safety stop. When we returned to the boat, I felt a sudden tingling in my right foot followed by a dull ache in my knee. I assumed the worst, thinking I had decompression sickness (DCS). When I reviewed the dive in my mind, however, that seemed impossible.
Dive legend Tec Clark has built a memorable career and legacy around training excellent divers. He describes his underwater experiences as “absolutely worshipful” and “otherworldly.” It’s the place where he feels closer to God than anywhere else on Earth. Helping others safely and professionally experience this same life-changing magic is his focus. Clark summed up the philosophy behind all his advice to new dive professionals: “Great training is the key to great diving. Don’t cut corners. Offer excellent training. Go beyond the standard.”
Turbid water can be a challenging environment for underwater photographers, particularly when shooting wide angle. Turbid water may not appear brown or green from the surface — in many cases the water looks entirely different once we drop in and begin the dive. All water is turbid to some degree. Understanding what causes turbidity and knowing how to work around it can make a world of difference when shooting in those conditions. One of the best skills a photographer can develop, particularly for shooting wide angle, is learning how to read water quality.
Thunder Bay National Marine Sanctuary in Lake Huron off the northeastern coast of Michigan has nearly 100 known shipwrecks, and others are still being discovered. The oldest shipwreck there sank in 1849, but many wrecks are from the mid- and late 1800s to the early 1900s. The location, history and variety of ships — from wooden schooners to freighters — make Thunder Bay special. The wrecks are at various depths, ranging from the snorkel zone to recreational and technical diving levels.
Sometimes life gets in the way — family obligations, unforeseen injuries, work responsibilities, social events — or perhaps the world as we know it shuts down for a while. When these things overwhelm us, many people tend to sacrifice exercise first. You may miss a few workouts, and then your exercise routine slowly slips from regular to nonexistent. It happens to most people — even fitness experts and professional athletes — at some time. Although it may feel challenging, it is possible to restart your exercise routine.
The first step in ensuring the safety of staff, divers and the public is to develop a detailed awareness of the real risks present in all operations performed by dive businesses and professionals. DAN® has produced a brief guide for anyone responsible for safety. The guide offers an introduction to identifying and understanding 17 of the most common areas of concern. These potential incident sources highlight the kinds of considerations that need attention and help operators to better understand how they might apply this knowledge to their businesses.
Interactions between different species, whether above or below water, typically revolve around confrontations between predators and prey. At the opposite and more harmonious end of the spectrum, a scattering of unrelated species coevolved to form lifelong alliances for their mutual security. These relatively rare go-along-to-get-along partnerships provide a net benefit for both parties, improving each species’ reproductive success. The close living arrangement between weak-eyed alpheid snapping shrimp and sharp-eyed partner gobies is a classic example of symbiosis in the sea.
Reduced exercise tolerance is common for those with chronic obstructive pulmonary disease and poses risks for diving. There can be strenuous activity involved with managing currents, swimming on the surface in choppy seas or pulling yourself and your heavy gear up a ladder and onto an unsteady boat. With COPD, shortness of breath during exertion doesn’t mean you are out of shape; it means you cannot rid your body of carbon dioxide and replace it with the oxygen needed to meet the demand of your exertion.
Sarung tangan adalah salah satu peralatan menyelam yang paling sering diabaikan dan bersifat individual. Saat memilih sarung tangan, pertimbangkan jenis penyelaman yang Anda rencanakan dan apa yang Anda harapkan dari pelindung tangan Anda. Saat memilih sarung tangan, pertimbangkan faktor-faktor berikut: perlindungan termal, kesesuaian, ketangkasan, perlindungan dari bahaya, ketahanan terhadap benturan, dan bahan.
Narkosis nitrogen dapat menyebabkan konsekuensi yang mematikan. Memahami faktor risiko dan memastikan bahwa Anda dan teman menyelam Anda telah mendiskusikan cara mengurangi risiko berpotensi menyelamatkan nyawa. Jika Anda tersengat ubur-ubur, perhatikan gejala yang terkait dengan sindrom Irukandji. Jika timbul gejala, ketahuilah bahwa ini adalah kondisi yang berpotensi mematikan dan dapat ditangani oleh dokter. Perhatikan buletin dan pengumuman tentang kehidupan laut setempat. Cara terbaik untuk mengurangi risiko gigitan ubur-ubur adalah dengan mengenakan pakaian tertutup dan menghindari ubur-ubur saat mereka banyak terdapat di air.
