triox vs. trimix?

[milldog]

Originally Posted by Howard Payne

Damn right - sort the slow tissues out on the boat with a few Nurofen and a nice cold lager

Standard procedure then

Graham

[Mark Chase]

Originally Posted by Howard Payne

What orangey brown and extremely bent? Now that's a good reason to do plenty of deco kids - insufficient deco turns you into Dale Winton.

Chasey still hasn't bitten - curses - my Jedi powers must be weakening

Look, I am old and fat and I need to do a lot of deco OK. Besides i am told insufficient deco will shrink the cartilage between the vertebra and i cant afford to get any shorter.


ATB

Mark

[Rod Abbotson]

I personally use "triox" (all trimix as far as Im concerned! Heliair, Helitrox,Triox etc )as a deeper deco gas to reduce the risk of IBCD on deeper trimix dives - I also work to a higher END again to reduce the risk of IBCD when switching to a higher nitrogen percentage deco gas. Sort of a balancing act on all the risks involved!

As knowledge is changing all the time and we are diving deeper for longer than ever before one has to keep an open mind and be willing to change practices!

I mostly will use a helair mix for a bottom gas which will give me an END of 56m at 1.4 ata 02 and 66m at 1.6 ata 02. Even with this I still need to switch to triox as opposed to air or nitrox especially on 100m plus dives.

V planner doesnt really work to well after 80m try Deco check that works OK down to 300m sometimes!

Not sure what the DIR bunch think on that one!

[Ferg3333]

Originally Posted by Mal Bridgeman

Is Rec Triox a "qualifying" cert for ELT? If so then that would be an "easier" route ..... but where would the AN & DP skills be taught? Since I think the ELT course presumes you have them and the Rec Triox does not cover them IIRC.

Mal

Yes it replaces advanced nitrox in the IANTD syllabus, but then normoxic is a 6 day course, really i should have read the two pages after your post, bit slow today...

[Howard Payne]

END of 56m

Apparently the planet is running out of Helium - I guess you're just doing your bit mate!

[RichW]

Originally Posted by Rod Abbotson

V planner doesnt really work to well after 80m try Deco check that works OK down to 300m sometimes!

Really? What model does it use?

Rich

[Rod Abbotson]

What model does it use?

I assume you are referring to DecoCheck

here is the link DecoChek Decompression Software : Welcome

It was developed by Steve Burton after he used the earlier version for Mark Ellyatts 313m dive. Its really for the VERY deep stuff.

I am currently using v planner to 100m with no problems - but have been warned by many that I will end up in the pot! So thinking of switching to Deco Check once I can afford the 50 quid!

Definitive Decompression...For Advanced Deep Diving

Advanced scuba decompressions


so what are the vies on this back in blighty??


Rod

[Mark Chase]

Originally Posted by Rod Abbotson

I assume you are referring to DecoCheck

here is the link DecoChek Decompression Software : Welcome

It was developed by Steve Burton after he used the earlier version for Mark Ellyatts 313m dive. Its really for the VERY deep stuff.

I am currently using v planner to 100m with no problems - but have been warned by many that I will end up in the pot! So thinking of switching to Deco Check once I can afford the 50 quid!

Definitive Decompression...For Advanced Deep Diving

Advanced scuba decompressions


so what are the vies on this back in blighty??


Rod

A lot of the deep deep divers in the UK don't like VPM at all. Ross gets a right slagging for some of the Vplanner claims.

TBH I haven't found any one who's diving past 90m to say a good word about it. Most seem to switch to VPMBE in that range which looks very much like GF deco with Buhlman shallow stops.

Personally I have cut a lot of VPMB tables but they looked scary so in the end I stick with GF deco for the diving I do. Mainly this is because i can get my head around GF's where as VPMB is all a bit technical for my liking.

Apparently VPM in V planner works better with helium and is more in line with modern thinking than GF deco. If you listen to the nay sayers its just bloody aggressive and will bend you.

Planning very deep dives on heleox or rich trimix I found the difference between the GF deco and the VPM deco to be pretty extreme. If i dived a lot in this range (100m+) id start wil VPMBE level 4 and see how it felt before venturing any where near VPMB.

ATB

Mark

[NotDeadYet]

Originally Posted by Mark Chase

Personally I have cut a lot of VPMB tables but they looked scary so in the end I stick with GF deco for the diving I do. Mainly this is because i can get my head around GF's where as VPMB is all a bit technical for my liking.

George Irvine, in his ever so succinct way, made a good summary of it on his brief visit to the VPM list:

VPM was tested on jelly, Buhlmann was tested on humans.

[rossh]

Originally Posted by Rod Abbotson

I am currently using v planner to 100m with no problems - ..... So thinking of switching to Deco Check once I can afford the 50 quid!
Rod

Hi Rod,

You might want to consider comparing some plans before you swap over.


HMS Victoria sample plan, 120m 5 mins - 96 Runtime in Decochek, 94 mins in VPM-B +2
Mohammad's 220m Dive Plan on Decochek, is approx equal to same plan with VPM-B +2.

It would appear that the AB model of Decochek and VPM-B can align rather well over 100m.

(Note If you try these compares - take care to align descent, ascent rates and actual bottom times in each - any variance in these will make a big difference.)