Things to know about Dive Computers
Risks of Diving
Diving has exposed the public to the many underwater wonders of the world. The beauty of the various kinds of life that is in the deep blue hides the biggest danger of diving. It isn’t sharks or boats or anything else that may exist on or in the water. The real danger to divers is Caisson disease, or decompression sickness.
Also known as the bends, the disease can afflict anyone who goes from a high pressure to low pressure environment. The illness results from Henry’s law, which says in short that when the pressure goes down, gas will form bubbles in a fluid. In the case of the bends, the fluid is the blood and the gas is typically nitrogen.
When the process occurs gradually, such as in an airplane cabin, the lungs have enough time to remove the gas before the bubbles form. When it occurs quickly, such as in the case of a diver surfacing too fast, it may result in itching skin and rashes, pain in the joints, paralysis and potentially death.
Bends Prevention
Preventing the bends requires the diver to ascend slowly, allowing the gas to naturally de-gas. The number of variables to consider when calculating the time needed for slow surfacing makes it very difficult to determine. That is why a diving computer was invented. With its specialized timers and sensors, it can determine how deep the diver is and how long the diver was at that depth. Diving computers conduct its calculations in real time and determine how much time the diver needs to spend at a particular level to surface safely and prevent the bends.
Just about every brand and model of dive computer possesses the capability to sense the time that a diver has been at the varied depths. From this, the diving computer can estimate the divers blood-gas level and figure out: the time interval within which the diver can surface without worry about the bends; when and how long a diver should stay at each depth in order to safely surface; how deep the diver can go; and so on.
The Diver Interface
Visual displays which should be read clearly and visible while diving, are present on many forms of divers computer. To ensure that the diver does not experience information overload, the dive computer display should be uncluttered. Better models of diving computers, in addition to the information provided above, will display information such as the speed at which the diver is rising, the temperature of the water and the time of decompression at each depth. For analysis afterwards, many high end models can transmit the entire dive onto a computer.
There are also other features that can really set the dive computer ahead of the pack. Once a diver has surfaced, these upper end diving computers will display the time before a diver can board an airplane. That is one of the quickest ways to achieve the bends, is to board an airplane too soon. Other upper end models will also keep track of the air supply available from the diver’s tank.
Identifying how much information is provided on the display and if the display is clear and readable is essential when shopping for a dive computer. The consumer should also note the other features that the product contains and what it monitors in diving quantity terms. The Suunto D9 would be the perfect example of a diving computer with all the necessary qualities needed to ensure a safe and secure dive.
How to Use One VGA LCD Monitor to Control Two Host Computers/ PC with 2-Port KVM Switch Box
|
|
Maverick Industries ET-73 Maverick RediChek Remote Wireless Smoker Thermometer $29.99 Monitor the temperature of smoked meats from up to 100 feet away! Wireless receiver with LCD beeps and flashes when smoked meat temperature surpasses programmed temperature or if smoking chamber temperature falls out of programmed range. Receiver features count up/down timer, back lighting, belt clip and stand; transmitter has food probe wire, smoking chamber probe wire and stand/hanger. Can also … |
|
|
PUR CR-6000C 2-Stage Oval Water Pitcher with LED Indicator $26.15 The PUR CR-6000C Two-Stage Pitcher with LED Indicator showcases an innovative two-step purification system that removes 99.9% of microbiological cysts, such as cryptosporidium and giardia, as well as common water contaminates, like lead and chloride. A helpful LED Indicator alerts you when it’s time to change the filter, and the pitcher holds up to seven eight-ounce glasses of water, so you share … |
|
|
Maverick ET-7 Remote-Check Wireless Thermometer With 2 Probes $38.95 Allows the user to monitor two different foods at one time Each food can have its own temperature or taste setting Transmitter and 2 probes included Choose from six settings beef, turkey, pork, veal, lamb, or chicken Taste or doneness rare, medium, medium well, well done as appropriate for each meat Choose your own target Set temperature up to 410 degrees F or 210 degrees C Actual internal food t… |
|
|
Dynex DX-AP110 – Video adapter – mini-DVI (M) – HD-15 (F) $0.99 This device is perfect for converting your apple notebooks to video projectors for presentations to teams and groups. It allows you to have the option of using a VGA monitor as a larger viewing area than the oringal lap top screen provides…. |
|
|
Quinny Buzz Stroller Footmuff, Pink Blush $69.99 Quinny Stroller Footmuff – Pink BlushThis cozy insulated footmuff is compatable with the Quinny Buzz, Quinny Senzz, and Zapp Xtra and desinged to keep your baby snug and warm in the cold.Product Dimensions: 28.25″ x 15″ x 2.5″Recommended Age: Birth to 4 yearsRecommended Weight (in pounds): Up to 50 lbs… |
|
|
LG LCD E2210P-BN 22inch Wide DVI VGA 1680×1050 50000:1 5ms Retail LED-backlit Go Green and enhance productivity with the LG E2210P Widescreen LED-backlit LCD monitor with the highest EPEAT (Electronic Product Environmental Assessment Tool) Gold rating for its environmentally responsible manufacture. Designed with a rema… |
|
|
La Crosse Technology Weather Direct WD-3308U-WAL 4 Day Internet Powered Wireless Forecaster $37.89 THE ENEMY WIND is one of The Weather Channel’s most popular documentaries. It deals with tornadoes, their behavior and how they are generated. As it explores our historical relationship with tornadoes, THE ENEMY WIND discusses recent research into improving our ability to forecast storms and shows the work of a group of nerveless adventurers, the tornado chasers. This video explains how researcher… |
|
|
Kidde KN-COSM-B Battery-Operated Combination Carbon Monoxide and Smoke Alarm with Talking Alarm $64.97 The Kidde KN-COSM-B Battery-Operated Carbon Monoxide and Smoke Alarm combines two important safety devices into a single unit. This alarm includes a voice warning system that announces “Fire, Carbon Monoxide, Low Battery, or Smart Hush Activation.” The voice alarm eliminates any confusion and clearly warns you and your family of a smoke or carbon monoxide danger, or if your battery is in need of r… |
|
|
Belkin Conserve Socket Energy Saving Outlet $0.01 … |
|
|
P3 International P4400 Kill A Watt Electricity Usage Monitor $29.99 Empowers You to Save Hundreds on Electric Bills Electricity bills are rising. Now you can cut down on costs and find out what appliances are actually worth keeping plugged in. Simply connect these appliances to the Kill A Watt, and it will assess how efficient they really are. The large LCD display counts consumption by the kilowatt-hour, the same as your local utility. You can calculate your elec… |