My AN/DP/Helitrox course

[grantctobin]

Let me guess - Roubidoux or Cannonball?

What leads you to guess these two sites?

 

[KentB]

Fusion. My local shop is DRIS, which does a boatload of drysuit repairs. It’s the off season here and they are swamped. Hopefully I’ll have it sooner since a neck seal is simple.

Wow......

 

[Jack Hammer]

Let me guess - Roubidoux or Cannonball?

Cow Springs

 

[Bierstadt]

Well, I am finally caught up on the thread. Good luck Marie.

 

[MomZo]

Hey guys.
Any idea when and why TDI increased Helitrox limits from 20% He to 35%?
That sounds like a good news but quite odd to only dive to 45m/150ft.
Just being curious.

 

[grantctobin]

Hey guys.
Any idea when and why TDI increased Helitrox limits from 20% He to 35%?
That sounds like a good news but quite odd to only dive to 45m/150ft.
Just being curious.

2020 standards update

 

[Marie13]

Hey guys.
Any idea when and why TDI increased Helitrox limits from 20% He to 35%?
That sounds like a good news but quite odd to only dive to 45m/150ft.
Just being curious.

Mark Powell had mentioned the change here and I messaged him to ask the reason for the change. Two reasons : other agencies have standard mixes with 35% helium (21/35) and some divers want a shallow END.

Depth is still 150ft.

 

[_Ralph]

Hey guys.
Any idea when and why TDI increased Helitrox limits from 20% He to 35%?
That sounds like a good news but quite odd to only dive to 45m/150ft.
Just being curious.

21/35 is a standard mix with a MOD of 45m

Easily mixed with 32% top up


_R

 

[wetb4igetinthewater]

Hey guys.
Any idea when and why TDI increased Helitrox limits from 20% He to 35%?
That sounds like a good news but quite odd to only dive to 45m/150ft.
Just being curious.

My guess is adhering to DAN's ideal max gas density of 5.2 g/L. 21/35 at 45 meters is just over 5.

 

[stevensamler]

2020 standards update

Gas density and END.