Challenge (easy one). Deco.

[ARY]

Leave tables and computers alone. Take calculator. Create safe realistic deco schedule for a dive BT 90 min at 100 ft. Make your gas selection. It is not a question from a fullcave written test right?

[WJH]

Go deep. Stay long. Hope for the best!

WJH

[Cindy]

Ok, I'll add to this one. Sneak diving, walked a very long way up a spring run with my buddy dragging a canoe and our gear. When we got there my buddy had forgotten his two computers. It was a very hot day so no way were we going back. He took my computer and I took my tables and bottom timer. We dropped into a S shaped opening. I was upside down and digging my way into a fantatic sidemount cave and guess what? I see a marble. Of course I had to have it and as I was stuffing it into my pocket, my tables blew away...I thought, OK well we can deco off my computer. I didn't know my computer had died and my buddy thought, OK we have tables and we can deco off those. To justify this a little it was hot, a great cave, a sneak dive etc....I know, no excuse but we did it! We did 90 minutes, max depth of 110, no tables or computer for deco. Without cheating..What would you do? Cindy

[amphipod06]

Roughly, and I am doing this off my head...
60 feet stop for 2-3 min
30 feet stop for 3-5 minutes
20 feet go on oxygen for 14-18 minutes and never never forget to have a back up timer and a note book (wet notes) with bail out info and other minutiae clipped to the bungee in my pocket

Dive safe,

Celia

PS That would be on 32% back gas and 100% deco gas (20 ft stop) and I can do the 90 min on backgas.....

[skip]

90 min at 100 feet is a bit much for my sac, so i'd be pushing it. But if possible I'd:

50ft, 1m
40ft, 1m
30ft, 2m
20ft, 7m 99%
10ft, 7m 99%

I assume backgas is 32%. and I have deco gas available.

I then asked v-planner, and got much less deco time, and no deep stops.

-skip

90 min at 100 feet is a bit much for my sac, so i'd be pushing it.

Well, 90 minutes at 100' means I'm using some backgas. The best I can do with a stage 80 only at 100' is about an hour.

On a 100' dive I'd be breathing EAN34. I ALWAYS do a Pyle stop for three minutes, so that would be at 50'.

I'd add a half-Pyle stop at 25' for three minutes, and then go on oxygen. I'd figure five minutes at 20', then since I'd guess I'd have fifteen minutes left, I'd do between twenty and thirty, kicking myself for not having a computer or tables. Better to do too much than too little. You can't un-ring a bell!

Now after running it on V-Planner, I only needed ten minutes at 10 feet. So my penalty for stupidity was twenty minutes.

[aw]

I'd do about 1/4 the bottom time for deco on O2. So roughly 20 minutes.

[DeWayne]

First, I would kick myself for not taking time yet to read those articles on ratio deco that I downloaded from the other place. Next I would try to match my current dive times and depths to a similar dive and pad the times a bit.

[aainslie]

There doesn't seem tbe much reason to take chances. I'd do:

EDIT for air

50 ft 2 min
40 ft 2 min
30 ft 10 min
20 ft 15 min
10 - 15 ft 30 min
At least 10 mins surface breathing while we tell each other what klutzes we are!

Why not? I KNOW it's too much. But it's 10 to 15 minutes to be safe.

[Cindy]

Oops, forgot to tell you I had a stage and was on air. CB