Recently, a friend and I have described, saying that he was flying, the watch glass actually baffling is gone, but also an expensive IWC watches. This situation may be considered one example, because the vast majority of people probably have not encountered before, not even heard of, but it is indeed likely to happen.
Say this is a pressure problem. We know that the altitude and atmospheric pressure are related, then the atmospheric pressure at higher altitudes, the lower the atmospheric pressure decreases with altitude increase, to a certain extent, the elevation is increased by 12 meters, atmospheric pressure decreases 1mmHg.
, Now the aircraft flight altitude of about 10,000 meters or so in order to protect the safety of passengers and flight comfort, the cabin pressure must be given, even if so, when the aircraft up or down, they still have ear pain, ear plug, or even eye pain, headache response occurred.
This situation is due to air pressure in the pressure inside and outside the body not the same, reflecting the sensitive eardrums and eyeballs, I was like, chewing and Zhang Zuidou No matter, the only way to make points Fortunately, yawning. Qualified waterproof watch, and certainly a good seal, watches right to resist pressure from the outside world there are two situations: compression and decompression. Pressure, the watch glass or the table to the more pressure will be more compact; while experiencing decompression is not, it is a similar negative pressure vacuum, glass and watch to be the outward expansion of the force.
Waterproof watch was doing experiments, we also have a negative pressure to do the way the watch placed in sealed pressure tank to reduce the atmospheric pressure to 400mmHg, very powerful, and air space of watches, including the use of mountaineering watch, we need to do specifically this experiment, experiment failed watches, watches, will storm out of the glass case. Now watch waterproof experiments, which are basically used equipment, pressure pumps, including decompression, the experimental equivalent of the pressure of the actual pressure storage tank, the aircraft's pressurized cabin and if so, the pressure is just not that big only. Therefore, once by plane is equal to you watch a certain extent, made one such experiment.
If civil aircraft at high altitude sudden decompression, people would immediately faint spot, never in the past, there will be life-threatening; watch after a sudden decompression of the pressurized seal is not a good watch (except for completely waterproof), but also can watch glass to the top out of this in-depth diving watches, the test can also experience this.
Bad waterproof watches, down do not have this problem, because bad seal watch, there will be a small gap, watches inside and outside the pressure is always the same. Watch glass to fly out, is not because of internal and watch the air pressure between the cabin pressure difference, as well as watches of glass combined with the case due to poor color fastness. Watch is dead, it can not, as people do, but also know that at this time should be open "mouth."
Watch glass is thin, glass and nylon seal between the case of watches, need to take extra care, the more thin glass, the combination of fastness with the worse case, the possibility of flying glass, the greater the lost.
My advice is: do the aircraft may wish to watch should first off, wrap well into the bag, the best and most reliable way is to also pull out the head watch, but this may cause a temporary stop watch go, wait until the next After the first observation of the aircraft under the watch whether the exception, if the glass is really falling, and you will not be lost, not at all difficult to install on a brand-name watches sapphire sheet of glass is also expensive. After the glass is lost, if not timely detection, but also lead to and dial damage to associated this to happen, trouble may go big.
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