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comparison src/Docu/Gas-Switching-Conditions.txt @ 634:4050675965ea
3.10 stable release
| author | heinrichsweikamp |
|---|---|
| date | Tue, 28 Apr 2020 17:34:31 +0200 |
| parents | |
| children |
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| 633:690c48db7b5b | 634:4050675965ea |
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| 1 | |
| 2 Rules for Gas Switching in the Deco Calculation | |
| 3 =============================================== | |
| 4 | |
| 5 The deco calculation switches gases on the following rules and conditions. | |
| 6 | |
| 7 | |
| 8 A new gas to eventually switch to is searched for: | |
| 9 -------------------------------------------------- | |
| 10 | |
| 11 a) Whenever arriving or staying on a deco stop. | |
| 12 | |
| 13 If a new gas is found, it will be taken. | |
| 14 | |
| 15 or | |
| 16 | |
| 17 b) On each calculation step, given: | |
| 18 | |
| 19 1) Cave mode is activated. | |
| 20 | |
| 21 If a new gas is found, it will be taken. | |
| 22 | |
| 23 or | |
| 24 | |
| 25 2) - extended stops are activated, or | |
| 26 - the dive is in bailout mode. | |
| 27 | |
| 28 If a new gas is found, it will only be taken if | |
| 29 | |
| 30 + the change depth of the new gas has not been passed yet (i.e. the | |
| 31 diver has not passed the change depth of this gas without actually | |
| 32 switching to it, so on purpose is breathing another gas), | |
| 33 | |
| 34 and | |
| 35 | |
| 36 + the dive is not on the final ascent. (i.e. no gas change will be | |
| 37 considered any more after leaving the last deco stop for surfacing) | |
| 38 | |
| 39 | |
| 40 When searching for a new gas, in order to qualify a gas must: | |
| 41 ------------------------------------------------------------- | |
| 42 | |
| 43 a) Be available, i.e. neither be disabled, lost, nor staged, | |
| 44 | |
| 45 b) not be of type 'deco gas' unless: | |
| 46 | |
| 47 - extended stops are activated, or | |
| 48 - the ascent calculation has arrived on a deco stop, or | |
| 49 - the dive is in bailout mode, | |
| 50 | |
| 51 c) have a change depth that is not shallower than the current depth, | |
| 52 (i.e. it must be breathable by configured change depth) | |
| 53 | |
| 54 d) have the shallowest change depth among all new gas candidates that | |
| 55 have qualified so far, | |
| 56 | |
| 57 e) not yet be fully used up in case contingency mode* is activated. | |
| 58 | |
| 59 For a gas to become elected as the new gas, it must match all of the above criteria. | |
| 60 | |
| 61 If none of the configured gases qualifies to become a new gas, the deco calculation | |
| 62 will continue on the current (last selected) gas. | |
| 63 | |
| 64 ____ | |
| 65 * contingency mode is auto-activated in case the dive started in cave mode |