Galileo Sol.pdf

3. Diving with GalileoThe fi fth page shows the MB level withwhich the dive was started and, if therewas an MB level reduction, what the fi nalMB level was. It also shows the averageheart rate (if available), the altitude class,the lowest battery level during the dive andthe amount of gas consumed.The sixth page shows a listing of all thealarms and warnings that were triggeredduring the dive.Within the list of dives there is also Divestatistics with a range of dates. On thispage you can see the longest dive ever madewith the computer, the deepest dive, the totaltime spent underwater, the total number ofdives and also the number of hours that thecomputer has been on (on the surface ordiving) since the last battery change.At any point in time inside the Logbookmenu, press EXIT to return to the mainLogbook menu.3. DIVING WITH GALILEO3.1 NitroxNitrox is the term used to describe breathinggases made of oxygen-nitrogen mixes withoxygen percentage higher than 21% (air).Because Nitrox contains less nitrogenthan air, there is less nitrogen loading onthe diver’s body at the same depth ascompared to breathing air.However, the increase in oxygen concentrationin Nitrox implies an increase in oxygen partialpressure in the breathing mix at the samedepth. At higher than atmospheric partialpressures, oxygen can have toxic effects onthe human body. These can be lumped intotwo categories:- Sudden effects due to oxygen partialpressure over 1.4bar. These are notrelated to the length of the exposure tohigh partial pressure oxygen, and canvary in terms of the exact level of partialpressure they happen at. It is commonlyaccepted that partial pressures up to1.4bar are tolerable, and several trainingagencies advocate maximum oxygenpartial pressures up to 1.6bar.- Long exposure effects to oxygen partialpressures over 0.5bar due to repeatedand/or long dives. These can affect thecentral nervous system, cause damageto lungs or to other vital organs.Galileo keeps you safe with respect to thesetwo effects in the following ways:1) Against sudden effects: Galileo hasan MOD alarm set for a user-defi nedppO 2max. As you enter the oxygenconcentration for the dive, Galileoshows you the corresponding MODfor the defi ned ppO 2max. The defaultvalue of ppO 2max from the factory is1.4bar. This can be adjusted to yourpreference between 1.2 and 1.6bar. Itcan also be turned OFF. Please refer tosection 2.3.4 for more information onhow to change this setting.2) Against long exposure effects: Galileo“tracks” the exposure by means of theCNS O 2 clock. At levels of 100% and42