A diving mask is an item of diving equipment that allows scuba divers, free-divers, and snorkelers to see clearly underwater. When the human eye is in direct contact with water as opposed to air, its normal environment, light entering the eye is refracted by a different angle and the eye is unable to focus the light. By providing an air space in front of the eyes, light enters normally and the eye is able to focus correctly.
Types of diving mask
* The old type with one big oval pane. In the oldest diving masks this window was an ellipse.
* Similar to the previous, but the window is closer to the face, and the window has a big cutout below to fit over the nose, which is kept dry by an expansion of the rubber mask edging.
* Similar to the previous, but with two windows, one window for each eye, as shown above. This type can have the windows closer to the face than the one-window type and thus contain less space for the diver to have to blow water out of if the mask floods.
* The double-dome mask. This is a new invention by HydroOptix. Double-dome masks allow a wider field of view and avoid the refraction error in perceived distance and size of objects. Underwater the curved mask windows make the diver's vision effectively more hyperopic / less myopic and the diver must wear special contact lenses to compensate (unless his eyes are myopic to the right amount to compensate exactly for the refraction at the curved mask windows); his vision will go myopic when he puts his head out of water with the contact lenses in.
* Other optional features:
o Blowoff valve.
o Indentations underneath for the diver to put a thumb and forefinger in to pinch the nose to aid ear clearing.
* The Data Mask, developed by Oceanic, is an eyes-and-nose diving mask with a built-in LED display which displays various dive and breathing set conditions including the function of a diving computer. It is currently very expensive.
Click on the picture below for more information:
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Water Print Reversible Strap Cover for Scuba or Snorkel Mask |
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This Neoprene Strap Cover simply slips over your existing strap. Dual Colors, One on each side. |
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Psychedelic Print Slap Strap for Scuba or Snorkel Mask |
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Think comfort. This orginal slap strap is Great! 6.5mm Neoprene Slap Strap. Patented slap strap design easily asjusts for unbeatable comfort style and eliminated pulled hair. The 6.5mm neoprene with a plush backing and no-fray velcro style attachment |
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Aqualung with a Snorkel Mask and Flippers Sports Framed Art Poster Print, 18x22 |
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Art.com is the world's largest retailer of art prints, posters, photographs, and framed artwork. With our huge selection of over 400,000 prints, you'll easily find the perfect piece for your home, office, or classroom... |
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Underwater Kinetics Mini Q40 Xenon FlashlightReviewsI have been using this flashlight for years because the light is very bright and adjustable between wide-angle and focused. It also easily attaches to a swim-mask or, for land use, a headband, for hands-free use. The bulb has a long life, but unfortunately is not replaceable, so when it goes, one needs to replace the whole flashlight. Still I can't complain given I got about 20 years of use (not day to day, obviously) from my last one. This is a very light weight very bright flashlight. It is just over 6 inches long. It takes two AA batteries. It has a wrist strap so you can avoid dropping it, and it is waterproof. You can't turn it on with one hand because it switches on by turning the front as many waterproof flashlights do. Update. I stand corrected. It has 4 AA batteries. This is a great flashlight for use on a boat or near the water. Very bright and usedful to see in tight places. Very small in size and easily tucked in a travel pouch. Average Rating:![]() |
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Mini Q40 Back Up Light. |
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Firefighter Mask Fog Wiper |
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This fog wiper is a manual device that allows the user to slide a magnet on the outside of the glass, causing an inside magnet to move in unison and wipe off fog. This product works with all types of firefighting airpacks (e... |
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Underwater Kinetics Sea Turtle Pack (Safety Yellow C4 eLED, Mini Q40 eLED w/mask strap, Dive Beacon) |
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Underwater Kinetics Sea Turtle Pack (Safety Yellow C4 eLED, Mini Q40 eLED w/mask strap, Dive Beacon) |
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A View From BelowReviews"A View From Below" explores the obsessive drive that led the young American, Karl Stanley, to begin construction on a homemade submarine in his backyard when he was just 14-years old. At the age of 24, he began taking tourists on deep water expeditions from Roatan Island, off the coast of Honduras - sometimes going as deep as 2600 feet. Undeterred by those who argue that only professionally-designed and certified submarines can possibly be safe, Karl created a unique underwater craft that allows him and his passengers to get up close and observe fascinating and in many cases undocumented deep sea creatures. His long track record, he argues, and his careful attention to the safety of his craft, more than makes up for his refusal to subject his submarine to the prohibitively expensive regulations of the professional certifying bodies - even while he insists that he is aware of the regulations and adheres to most of them. The film is beautifully shot and presents a range of perspectives on Karl and his work - the opinions of other professionals in his field, those who know him well and those who find him to be a strange character. It doesn't have the feel, though, of a merely informational television video - gorgeous undersea imagery, and impressive visuals dominate over talking-head style interviews. Plus, the interviews are interesting and above all Karl is a fascinating man, whose passion and drive is both inspiring and yet appears to border on obsession. Watching him, though, it's hard to imagine a better life than one in which an unbridled devotion to dreams fulfills itself in a satisfying way of life. I couldn't help but wonder, for a moment, what Werner Herzog might have done with this material -- since Karl strikes me as exactly the type of person Herzog likes to investigate in some of his documentary works (like Dieter Dengler in Little Dieter Needs to Fly or Timothy Treadwell in Grizzly Man). In some cases the film's take on Karl may have been excessively literal, and didn't go far enough for what Herzog calls "ecstatic truth," but might have. There are moments - as when Karl discusses the occasion when his parents sent him to a strict boarding school in order to curb his impulsiveness, and his lingering resentment betrays itself. Or when, on a submarine dive, Karl tells his passenger that Bugsy committed suicide over a woman by diving too deep -- and then, to the passenger's surprise and ours, he reveals a skeleton in diving gear as Bugsy himself. Or when a gigantic shark, larger than the submarine, circles in slowly and devours meat that Karl had attached to his craft. I did like the balance in emphasis between the person and the undersea he explored, and think it wouldn't have been as strong a film if the filmmakers had chosen to make it more about the underwater explorations than about the man who made them possible. Highly recommended for anyone with an interest in the ocean, or who ever had a dream and let it die because they were told or felt that it couldn't possibly be practical. I've been waiting for the availability of this DVD since before February of 2009 when my wife and I dove with Karl Stanley to 2000 ft in his submarine Idabel. This film does an excellent job of both telling the story of Karl Stanley and his submarines, and also showing what a dive on the Idabel can be like. Deciding to dive with Karl requires a personal risk/reward assessment and this DVD (in addition to the numerous articles that have been written about Karl) is an excellent resource for making that decision. As a documentary film, it is informative and entertaining. The editing is excellent, with neither too much nor too little time devoted to any single aspect of the film. Technically, the video and audio is also completely professional. As scuba divers and naturalists, the absolute highlights of the film for my wife and I were the incredible fish and other sea creatures that are found only at these depths. While we saw some of these on our dive with Karl, the majority of them we had only previously seen in still photos, if at all. As Karl points out, there's a vast, mostly unexplored world down there. We would have preferred more such footage, but understand that this film isn't meant to be solely a nature documentary. Karl has done what few have even attempted. This is his story. And this DVD tells that story very well. I thought for a couple months about writing this review. I waited months for this video to be released because I had known about a sub on Roatan Island south of Honduras mainland. I was too cheap to admit interest in going on his sub. When I came back to the States I read and watched and looked at everything I could find about Karl Stanley and his sub, the glorious creatures I had missed seeing. I have the indescribable feeling that I might have done something really exciting in my life if I had just paid the money and taken the ride. I still don't know exactly where on Roatan he is but I am pretty sure it is near where the collectivos( public vans) first enter West End. I wish I had known that then. I never even got to see the sub. Some day I will go back . Karl Stanley will be my first stop.Buying this video is a great investment. For $12 you can see a little of what would cost $500,$800,$1200 (per person).He only takes 2 passengers and he can go down 2500 feet in about a 4 foot sub and visit 20 foot prehistoric sharks. YOU have a choice to buy the movie on Amazon.com before or after you go to Roatan to visit Karl Stanley.You can also visit Stanley Submarine web page. I hope his previous customers get word of this video.They would be jealous of us. Karl Stanley is an amazing man with an incredible passion for underwater exploration. His remarkable energy and enthusiasm will make you realize that even your biggest dreams are not impossible to reach. After watching this movie, you will want to jump into his sub and see the mind-blowing view from below yourself (which is possible if you pay him a visit in Roatan). I didnt realize people this incredible existed. While most kids doodle designs of boats and planes, Karl actually followed through with his childhood dream and built not one but two functioning submarines by hand! Whether you're into the amazing footage of 6-gilled sharks or the story of how Karl got to where he is today, it's definitely a must see! Average Rating:![]() |
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Pioneer into the deep-sea in the worlds most unique and innovative submarines with maverick submarine builder and underwater explorer Karl Stanley. Karl has never taken a back seat to his goals, particularly if they stand on the side of impossible... |
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DAN Non-rebreather Mask |
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Provides oxygen for breathing divers who cannot tolerate demand valve oxygen regulators Elastic straps for better fit Includes: Mask Oxygen reservoir bag O2 Tubing FULL MANUFACTURER'S WARRANTY *SCUBA diving equipment |
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Meret Emergency Oxygen O2 System Package Set, Backpack, Mask, Scuba Emergency, Sports Emergency, Sports Oxygen, Scuba Oxygen, Authorized Dealer Full Warranty |
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The RECOVER was designed to easily transport and quickly deploy your portable oxygen supply. Features of this must have product include: Complete MERETTM emergency oxygen systems includes MD425 liter composite cylinder with toggle valve A BRUUTTM all-brass regulator An adult concentration mask with tubing A CPR non-rebreather pocket mask and a suction unit Oxygen equipment bag This bag can secure an M9 (255 liters), an MD (425 liters), an MJD (623 liters) aluminum oxygen cylinder or a 425 liter composite or 623 liter composite medical oxygen cylinder with the regulator installed and ready for action Using EZ-Grab pulls bars, two main panels easily open to reveal your oxygen system and supplies Large dual mesh pockets can accommodate masks and tubing or ambulance bag The side panel can support a TS-ReadyTM DEEP STUFF pocket or two STICKIT STRIPS Dual outside zippered pockets with internal elastic mesh pockets offer additional storage for small items This bag is ergonomically designed for use as a backpack or shoulder bag or briefcase style All sides of the bag that touch the ground are reinforced with PVC to ensure durability and to resist water AUTHORIZED DEALER, FULL WARRANTY!!! These systems provide a convenient total solution for oxygen response!!! |
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PADI Emergency Pocket Mask for CPR Scuba Dive Diving Divers Equipment Gear |
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Decorated Mouse Pad with man, body, individuals, individual, humans, person, human, diver, persons, fish, diving, mask, people, animal, scuba |
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Professional "Brite White" fabric mouse pads are among the most versatile and durable, providing brilliant graphic reproduction for spot color or full color imprints. This durable polyester surface is above industry standards and provides a superior product value overall... |
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Decorated Mouse Pad with fish, mask, animal, swimming, scuba |
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Professional "Brite White" fabric mouse pads are among the most versatile and durable, providing brilliant graphic reproduction for spot color or full color imprints. This durable polyester surface is above industry standards and provides a superior product value overall... |
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Poolmaster Vantage Competition Swim Goggles Set |
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Aqua Leisure Dolfino Silicone Low Volume Dual Lens Mask in BlueReviewsIf you have an average size nose, it won't fit under the mask. Water seeps in. If you're looking for a good mask without the big price tag, then get this one. You'll save a ton of money and and be able to enjoy it too! It has held up really well for my family of 8 in the pool. It is comfortable and easy to wear. I love the tempered glass lenses. Average Rating:![]() |
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Poolmaster Mondeo Pro Scuba mask/Snorkel |
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Liquid Image 5.0MP Video Scuba Mask - Blue (HD321) - LargeReviewsI just used this for the first time in a Pennsylvania quarry. I turned it on before entering the water, and turned it off after I got out almost an hour later. The video quality is very good, and it picks up audio well. The images are clear, and should be since it's advertised as high definition. Being this is a first edition, I hope a few changes are made in the next version. First, when seating the mask skirt under a hood, it is very easy to hit the button to change it from video to still image (or reverse), and it can be accidentally shut off. There is a blue or red light (depending whether you are shooting video or still images) that is difficult to see while wearing the mask. It is visible, just not clearly. It would be nice if there was a clear display a little lower. Also, each time I exhaled, the bubbles caused the mask and camera to shake, which is clearly visible in the video. As for the scope of view, the camera seems to be shooting higher than most divers are really looking. When checking my computer, all you see is the top of my console or computer. It would be nice if the camera was even a little adjustable, so it can be tilted up or down depending on what the user is doing. Overall, I'd say this is a hit! Even if there are a few negatives, I was really happy with this mask. I took it to 75' (not deep) for 49 minutes in 45 degree water, and it recorded the entire dive. I can't wait to use it off the Jersey shore for some wreck diving. Now if you can make one to go a little deeper! Average Rating:![]() |
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The Liquid Image HD320 has an integrated waterproof HD 720p digital video camera which clicks photographs at 5 Megapixel. It can operate till a depth of 115' and eliminates the need to carry an underwater camera... |
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Liquid Image 301 Explorer Digital Camera Mask |
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Ever want to capture footage of your own underwater adventure? Whether you're snorkeling or swimming, with the Liquid Image 301 Explorer Digital Camera Mask you'll get pristine images of the deep blue... |
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XS Scuba Snorkel Backpack, Mask Bag & Sea Gold Anti Fog Gel ( Color: Black Fin Bag (BG330) ) |
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Soft Neoprene Scuba Diving Mask Straps |
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Soft Neoprene Mask Straps - Combines the easy use of webbing and buckle with soft neoprene providing easy-to-use soft strap. Won't catch on hair. Each strap is reversible in color. |
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Mares Pure Vision Single Window MasksReviewsThis mask is excellent for guys that have a moderate brow. If you look at other masks, many are so low profile that if you have a slight brow touches the lens of the mask. The brow is located from eyebrow to eyebrow, for those with needed explanation. If it touches the lens of the mask or frame it can place undue pressure on that point. I purchased an Atomic Aquatics frameless mask and returned it for this mask. The Atomic mask is very low profile and does not have room for a face that has a brow. If your face is relatively flat then you should be fine with the Atomic mask. I love the colors offered in the Pure Vision mask, which include the all black silicone, and it's feel. Good vision from side to side and up and down. Good choice for scuba diving or snorkeling. Average Rating:![]() |
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The Mares Pure Vision Single Window Mask - Modern design and cutting-edge technical solutions. Superior field of vision thanks to the special shape of the lens, the reduced internal volume, and the central position of the eyes... |
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The 2006-2011 World Outlook for Rubber and Rubberized Dry and Wet Suits, Scuba, Skin Diving, Aqualungs and Attachments, Face Masks, Fins, and Other Underwater ... Equipment Excluding Cameras and Watches |
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WHAT IS LATENT DEMAND AND THE P.I.E.?The concept of latent demand is rather subtle. The term latent typically refers to something that is dormant, not observable, or not yet realized. Demand is the notion of an economic quantity that a target population or market requires under different assumptions of price, quality, and distribution, among other factors... |

























