Computers With Monitor
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.
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