Is it necessary to adjust the equipment for diving at altitude?, How to adjust a capillary depth gauge?

Questions 4 C and D in exams knowledge for altitude diving adventures in diving, my book isn't updated and says nothing about computers, and Im having trouble understanding the part of the capillary depth gauge.

Computers will flip in altitude automatically or at least those in the past 5 years. A little on capillary meters. The concept that is a tube open at one end. The trapped air inside is compressed as you dive deeper on the water pressure acting on it makes little widget connected to the gossip, turn the dial:) They operate according to Boyle's law (the volume of a gas sample is inversely proportional to the applied pressure the gas if the temperature remains constant.) A capillary indicator will not be completely accurate when diving at altitude – at least in real depth readings go.That 's by which adjust to the altitude in the RDP. The indicator is read more than its actual depth. In fact, the relationship of reading to his royal background will be the same as the ratio of pressure Sea level pressure in the lake. I double checked the test on the high dive at the back of the AOW PADI manual. In short, it recommends the extension actual depths pressure ratio above to obtain a "theoretical depth" which later would be used in the tables instead of its actual depth. As a result, an indicator capillary scale makes it automatically! Of course, there was still need for their regular depth gauge (or computer) if you want know exactly how deep you are. You may not use their reading to determine without decompression limits, however. But even if you only use the computer, an indicator of the capillaries and tables make a cheap backup that also fits. Good luck in the AOW!

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