Using A Long Hose Isn't Just For Tech Divers

[jonnythan]

what sac rate? what water temp? 700 psi per diver from 100 fsw = 1400 psi out of 2400? and if it's 700 psi totall there will be no safety stop unless one stops breathing.

or you could calc thirds of the smaller tank. but that would be too easy!

It's ok that you don't understand the concept of rock bottom.

500 psi in an LP95 is 18 cubic feet, or 9 cubic feet per diver. 700 psi is almost 13 cubic feet per diver. Personally I'd want 14, but 13 should be enough

 

[Jason B]

http://www.scubatoys.com/store/Scuba_Equipment.asp?PRODUCT_ID=OctoHose5ft

The 5' does not have to routed, a 7' does.

doesn't have to be routed? where is all the extra hose going...just hanging out there to snag on something?

Jason

 

[detroit diver]

http://www.scubatoys.com/store/Scuba_Equipment.asp?PRODUCT_ID=OctoHose5ft

The 5' does not have to routed, a 7' does.

Do you dive either a 5 foot or 7 foot hose? Have you tried both to know the difference?

 

[JeffG]

http://www.scubatoys.com/store/Scuba_Equipment.asp?PRODUCT_ID=OctoHose5ft

The 5' does not have to routed, a 7' does.

#1 its not a standard...its a bad solution to a problem. If they used that 5' as their primary it would work better.

You still have to "route" the 5' octo somewhere, but, yes a 7' primary doesn't work that well with typical consumer BCD's...(But they could still use a 40" or a 5' primary)

 

[ABQ]

I'm NAUI. What PADI does, does matter to "all recreational divers". Standards are just that.

 

[MASS-Diver]

what sac rate? what water temp? 700 psi per diver from 100 fsw = 1400 psi out of 2400? and if it's 700 psi totall there will be no safety stop unless one stops breathing.

or you could calc thirds of the smaller tank. but that would be too easy!

No, no my friend, you clearly do not understand Rock Bottom at all. Rule of thirds can be too much or too little - why not use real numbers instead?

I can calculate it for any sized tank and I can tweak it. If you can't find a thread on it - I can try to teach it to. Basically, you need to find the cu' of gas that you and your buddy need to ascend to the surface (and make all your stops) while sharing gas - you then never go below this number.

Sorry I can't resist, but I have to add maybe you should take a dive course that teach the most basic way to plan gas managment, instead of just guess how much you need. I know an agency that teach Rock Bottom even in their newbie course *wink*

 

[wedivebc]

BTW, Rock Bottom for a 95cu' tank on a 0-60' dive would be 500psi, on a 60-100 dive it would be 700psi (in both cases this includes saftey stops). You have a problem with these numbers? Do we need to review the math?

Still waiting...............

 

[JeffG]

It's ok that you don't understand the concept of rock bottom.

500 psi in an LP95 is 18 cubic feet, or 9 cubic feet per diver. 700 psi is almost 13 cubic feet per diver. Personally I'd want 14, but 13 should be enough

Details...Details...those pesky things

 

[jeffinhburg]

And since when is it a standard (the 5ft)?...if anything its the temperamental teenager...too short for overheads...too long for sloppy people.

I was under the impression that 5 ft was standard primary for a DIR single tank setup. Although not knowing much outside the volumes of posts on these boards about DIR, I don't know how a single tank can be standard for anything DIR without a pony, but that's a worry for another day.

 

[MASS-Diver]

I'm NAUI. What PADI does, does matter to "all recreational divers". Standards are just that.

I'm a rec diver and I guess what PADI does matters to me, if I see them endorse it, I know most of the time it's junk and I can avoid it. Standards don't matter to me - PADI rules rec INDUSTRY not the SPORT!