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Where When How March/April 2017 : Page 98

Relax | DIVE | Chill The best possible diving in the Turks & Caicos. We provide a high level of personal service, professionalism and fun to a small group, on our fast, comfortable dive boat. Private charters and private guiding -our speciality. Instruction, rental equipment and NITROX available. Complimentary Grace Bay pick up. Call us at 649-432-2782 | Out of Harbour Club Villas & Marina tion, which is simply a change in the angle and speed of light as it goes from the water through the airspace in your mask. To see this illusion in your kitchen, look at the difference in an object halfway submerged in a glass of water. Size and distance are not the only changes that water makes. Colors change, too. As you descend, the light becomes increasingly blue, which affects the way colors are perceived. That’s part of diving’s beauty. Although sunlight can descend to almost 600 feet, most of the light doesn’t make it past the first 30 feet. Sunlight is the combination of all the different colors (frequencies) of visi-ble light. And as these colors are sepa-rated by raindrops to form rainbows, so does water filter out the colors at differ-ent depths. Red is the first to go, fol-lowed by orange, then yellow, then green. Blue stays until the end and colors everything. If you want to take underwater photo-graphs and capture the subject’s true colors, you’ll need to bring your own “sunlight,” in the form of a strobe, even in the brightest conditions. One of the reasons that night diving is so different and vivid, especially on the ocean reef, is because your handheld lights show na-ture’s true colors, colors that are painted with filtered light during daylight dives. Although water is relatively colorless liquid, there are times when you can see it. When swimming in a thermo cline, that “line” which separates warm and cold water can look like clear jelly and becomes strikingly visible. You can see this at home, too. Put some ice cubes in a glass of cool water and stir gently. Naturally there are water conditions that don’t allow you to see much of any-thing. Divers always want visibility of 150 feet (or more), but water clarity de-pends on where and when you are div-ing. Recent storms, constant winds, and a variety of other forces can shake and stir the water and its sediment to the point where you won’t see much. Still these conditions offer the chance to concentrate on closer and smaller pieces of the underwater environment, and they can be as interesting as the bigger picture. Water absorbs heat perhaps even bet-ter than it absorbs different colors of light. Unlike air, which is a poor heat con-ductor and a good insulator, water can quickly steal your body heat. This is why your living room is comfortable at 72 F while the same temperature water is not only chilly, it requires some kind of expo-sure suit to make diving comfortable, and even safe. Although water temperatures below 98.6 F will lead to hypothermia, the low-ering of your body’s core temperature, you’d have to be in this water for about a month for the effects to be noticed. This process is accelerated, however, when the water is below 75 F, which is why it’s recommended that you wear an exposure suit when the water is at this 98 • • • • • MARCH/APRIL 2017 “Where When How -Turks & Caicos Islands”

Aqua TCI Ltd.

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