NAUI MAX Depth???

[Big-t-2538]

rab once bubbled...

If that's the case, I wonder what tables the dive boat uses when planning the SI between dives? You've got to expect a variety of tables and computers among the divers. Does the most conservative of all tables rule the day??

-Rob

to be completely honest, the two boats I have been on...they asked 2 questions

1 - who's diving EANx (essentially these are the first people in and out on each dive)

2 - Who's diving with a computer (group 2)

3 - Who's diving tables

In the cases I was on, they were concerned with diver safety to an extent, but they were more concerned about getting divers to the site, in the water, out, back in, out again, then back to the dock. Essentially we were free to dive any way we felt was safe. All the more reason to talk to your buddy pre and post dive, have a plan, and dive the plan.

 

[Karl_in_Calif]

chickdiver once bubbled...
Dive boats, especially cattle boats, do not plan the surface intervals based on dive tables. They base them on how quickly they can get the requisiite number of dives done, get back in to the dock, and pick up the next load.

Absolutely right about that.

One more reason to dive nitrox.

And even to bring a slung stage tank of your own rich mix to egress with, to lower your S/I time. I know ... virtually nobody does that.

Well, ALMOST nobody!

 

[Karl_in_Calif]

Big-t-2538 once bubbled...


to be completely honest, the two boats I have been on...they asked 2 questions

1 - who's diving EANx (essentially these are the first people in and out on each dive)

2 - Who's diving with a computer (group 2)

3 - Who's diving tables

The only time I have ever seen anyone diving tables was for their AOW class. First boat dive. No computer purchased yet. Getting some usage out of that macho scuba watch.

 

[narcT]

Yerba Mate once bubbled...
I'm PADI Rescue certified,so I know what PADI's standards are regarding depth, but I was wondering what NAUI's standards are.

I was talking to someone I know who was certified with NAUI in 1978 (Basic NAUI Cert). He asked me how deep I've gone and I said 100ft, but that PADI's max No-Deco limit is 130ft. He said I've gone to 160ft no-Deco. I thought ok maybe 140ft could be done without deco, but everything I've read says that 160ft is decompression of some sort, and personally I would not subject myself to that sort of diving unless I had the right training and equipment. I would not think that 160ft would be "Recreational" Diving in any agency.

I looked at NAUI's certifications online, and it seemed to be that their max is 130ft. So I was wondering if anyone knew what NAUI's current max No-Deco limit is? and What the No-Deco limit was for NAUI in the 70's?

I got my NAUI OW in 1975. The limit was 130 feet then. The change today is that OW cert is only good to 60 feet. You need AOW for 130 feet now. Not sure why they changed it?

And in 1975 we had NO BC's, NO dive computers, NO octo's, NO SPG's (used a J' resever to know when it was time to head up, pull the little rod down and prey), NO Nitrox, NO safety stops, and everything was based on the Navy Dive tables. AL80's at 3000psi were fairly new and everyone tried to grap them first.

Your question brings back a lot of childhood memories Wow, I survived the 70's!!!

 

[chickdiver]

Karl_in_Calif once bubbled...


Absolutely right about that.

One more reason to dive nitrox.

And even to bring a slung stage tank of your own rich mix to egress with, to lower your S/I time. I know ... virtually nobody does that.

Well, ALMOST nobody!

I would strongly disadvise promoting this student to OW divers who lack Advanced Nitrox training. For the untrained- this would be a recipe for disaster. I would also NOT recommend doing this with a single tank.

 

[Charlie99]

chickdiver once bubbled...
I would also NOT recommend doing this with a single tank.

Could you expound a bit more on why you would NOT recommend doing this with a single tank.

As I understood Karl-in-CA he was simply recommending the use of a 2nd, higher FO2 gas, as a way of speeding up offgassing a bit during the later portions of ascent/deep stops/"safety stop" when coming up from a dive.

For example, why not use a 19 or 40cu ft deco bottle of EAN50 to help offgas after a single tank dive on EAN32 to a 100' wreck for around 30 minute bottom time?

Charlie

 

[chickdiver]

Single tanks are inherently unstable, and tend to roll. Start adding more bottles and you exacerbate the problem.

Most BC's are not designed for the use of multiple cylinders.

It adds a level of complexity that is decidedly not necessary.

 

[GoBlue!]

Larry "Harris" Taylor has a page on his website that compares a repetitive dive series w/ various tables (done years ago, so current tables aren't listed, but US Navy approximates NAUI, etc.). The site ishere. It'd be interesting to do a similar comparison with the most common air tables out there today if someone has a collection.

Jim

 

[Karl_in_Calif]

chickdiver once bubbled...
Single tanks are inherently unstable, and tend to roll. Start adding more bottles and you exacerbate the problem.

Most BC's are not designed for the use of multiple cylinders.

It adds a level of complexity that is decidedly not necessary.

True true, this is not an AOW solution nor a basic nitrox solution.

This is an advanced nitrox solution.

Oh by the way, if you clip your slung stage tank to your right lower D ring and your left upper D ring, it works quite nicely. VERY stable that way with a single tank.

In a perfect world, everyone would indeed be diving doubles. But its not a perfect world. I absolutely hate dragging my doubles around with me. So I simply use one of the boat's nitrox tanks, and sling my own rich mix to egress with.

Advanced nitrox divers only, however.

In a perfect world, everyone would be a tech diver, and every instructor would be a tech instructor. How I admire you, ChickDiver !!

 

[cornfed]

Charlie99 once bubbled...
As I understood Karl-in-CA he was simply recommending the use of a 2nd, higher FO2 gas, as a way of speeding up offgassing a bit during the later portions of ascent/deep stops/"safety stop" when coming up from a dive.

Charlie, Karl is two things. He is trolling to make himself sound important. Also he's just babbling to keep his posting rate up.

If you don't believe me look at some of his other posts.