It 'very important and should anyone? Well, it might be important - it all depends on what you do with it. In fact, many people who know what it is, I can not understand how this simple mechanical device can lead to avoid serious injury.
Do I have to question again the other day from a customer at my local dive watch, then decided the answer for others who are wondering the same thing can get documented.
As with many products, it is quiteintuitive to understand how you can serve and for what purpose, provided you have one in hand. But if this is not the case and you only have interest in a product with this feature is to try and please someone else, then some definite information would be helpful to determine whether this very lengthy, important-sounding feature is actually desirable is or just a bunch of crap.
First, it is a device for most any decent quality diving watch, with the exception of those who found supplysame function electronically by computer, rather than mechanically. It may not even be on guard especially for diving, where usually only serves as a timer event, and found not so much as a safety device.
To be precise, is relatively large, usually metal ring surrounding the crystal on the dial. He usually describe the same indicators and for minutes as the clock ticks, with real numbers increase every 10 minutes. It also has aPointer scored in the neutral position to specify a starting point.
Its importance lies in its ability not only to help in the monitoring of the dive time, but do so in a way that something is failsafe. Together with depth, proper breathing, ascent rate, etc., precise knowledge of how long you have been down significantly enjoy a safe diving. How wrong can cause decompression sickness (DCS), resulting in injury or death.
There are several ways to use it for different dive profiles, butIt is usually used to dip all the time. Align the bezel with the minute hand pointer at the beginning of the dive and can see at a glance how much time remains before the ascent. The safety function of the bezel is that it is uni-or one-way.
It can only be turned counter-clockwise - the opposite direction to move the needle. That is, if the opening is quite difficult to turn met, there will be a lot of time has elapsed to show that the diver automatically wrongon the side of caution. Elapsed time is through faith and the rise earlier to avoid that, stay down for too long, thinking that they had plenty of time to be deceived.
On a good diving watch is a rotating bezel is easy to read, and comfortable fit to require a little effort to turn it on. There should be internal dashes, the ratchet bezel as it is and let the effect "snap", the orientation of the pointer exactly where the minute hand. Of course you shouldonly in a counterclockwise direction, and should also be knurled or notched on the outer edge so it is easy to understand and apply the water or while wearing gloves.
So now you know. Its utility and profit are inherent in its simplicity and purely mechanical, it makes a good backup of everything electronic. In fact, although he dived for years with a computer, I still use a clock with time-tested device for backup and set before each dive. Just like the old days, youremains a familiar level of comfort.
