As published in the undersea journal 2nd quarter that just came out?
Any thoughts on the 12 new TEC 40-45-50 linking options Requirements
- Thread starter divezonescuba
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Capt Jim Wyatt
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I looked through it quickly --- Looks OK.
Kevrumbo
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(Unless there is now an option to use Trimix) -->There is a fundamental and dangerous flaw not taken into account in the whole PADI Tec 40/45/50 course progression & certification to begin with: The Density of Bottom Gas Nitrox 24% to 21% for a max working ppO2 of 1.2 bar is 6 g/L and higher, with Tec 50 on Air a whopping 7.2 g/L. (Refer to article: Advanced Knowledge Series: The Gas Density Conundrum | Dive Magazine )
The point is there's no safety margin left at all for the hazards of CO2 retention problems that arise with unforeseen heavy physical activity and increased work-of-breathing at these certification depths of 40/45/50 meters on primarily non-Helium, high gas density Oxygen-Nitrogen Blends (essentially Extended Range Deep Air). And to recover at depth from CO2 retention, you need plenty of bottom gas and some minutes time to relax & regain a normal non-exertion respiratory rate -if possible- before safely aborting the dive and nominally ascending to any required deco stops.
The point is there's no safety margin left at all for the hazards of CO2 retention problems that arise with unforeseen heavy physical activity and increased work-of-breathing at these certification depths of 40/45/50 meters on primarily non-Helium, high gas density Oxygen-Nitrogen Blends (essentially Extended Range Deep Air). And to recover at depth from CO2 retention, you need plenty of bottom gas and some minutes time to relax & regain a normal non-exertion respiratory rate -if possible- before safely aborting the dive and nominally ascending to any required deco stops.
Capt Jim Wyatt
Hanging at the 10 Foot Stop
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Scuba Instructor
As I recall there has always been the helium option at Tec50.
OP
So if you did these courses separately, say 6 to 12 months apart how many dives would that take?
From the sounds of it not only are they allowing one longer Tec40/45/50 course with no time or dives in between, they are allowing the total number of dives to be reduced...
From the sounds of it not only are they allowing one longer Tec40/45/50 course with no time or dives in between, they are allowing the total number of dives to be reduced...
OP
On paper they would be 12 dives. In reality many more.
Maybe. We all know that there are plenty of instructors (in various agencies) who only teach to the bare minimum.
Capt Jim Wyatt
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Minimum of four dives for each level.
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