No Deco limits on deep (~100') double dips

[rob.mwpropane]

I don’t have to do it now!

Personally I'm not sure any of us should do it, lol

 

[rhwestfall]

Those dives are a typical two tank trip in the Great Lakes...

 

[scubadada]

I assume you are planning no stop dives. A plan would depend on your nitrox mix, the actual depth(s) of your dives, and your computer's deco algorithm. It may also depend on your gas consumption and cylinder size, may end your dive prior to NDL.

I ran a couple scenarios on MultiDeco, but decided they weren't worth sharing, with so many variables. You could run your own with all of your personal information.

My son and I did a quadruple on the SG one day and then a double on the Duane and a double on the Eagle the next day in 2015, off the Spree Wreck Trek. We were diving 32% with steel 100s, computers running DSAT (about a GF high of 95). Dive times on the SG were 57, 41, 53, and 51 min. The Duane were 48 and 46 min. The Eagle were 42 and 45 min. SI between dives 1 and 2 and 3 and 4 was around an hour. There was a longer SI between dives 2 and 3 each day. Max depths were 101-114 ft, avg depths 66-76 ft. We had a great time. Personally, I would not hesitate to do a double on these dives. A second dive the next day would be minimally or not affected by a dive the previous day.

Best of luck on your trip

 

[rick00001967]

I'll be diving nitrox - whatever % they give me (which, looking at my logs, seems like anything from 29% to 32%).

on 32% tables say 98 feet for 20 min. 60 min interval. 98 feet for 12 min. it is always interesting to see how the tables compare to the software models like the one posted above.

 

[rick00001967]

Those dives are a typical two tank trip in the Great Lakes...

cuz it's so damn cold we can't lastlonger then 15 or 20 minutes. lol

 

[rob.mwpropane]

on 32% tables say 98 feet for 20 min. 60 min interval. 98 feet for 12 min. it is always interesting to see how the tables compare to the software models like the one posted above.

PADI 32% tables say 35 min and then 18 min @ 90 ft (with hr si)? Even 100 ft on the 1st dive is 30 min?

 

[poseident]

Is the "60-minute standard surface interval" a valid assumption for operators on these sites?

 

[johndiver999]

Why not tell the OP what he needs to know:
first get certified for nitrox
second use nitrox and
third those dives are definitely worth doing .
Forth, use a computer and you will get credit for a bunch of time spent high up on the ship, so chances are he will be limited by tank size rather than no deco limits.

 

[rob.mwpropane]

Why not tell the OP what he needs to know:
first get certified for nitrox
second use nitrox and
third those dives are definitely worth doing .
Forth, use a computer and you will get credit for a bunch of time spent high up on the ship, so chances are he will be limited by tank size rather than no deco limits.

From his written account he is nitrox cert, does use it, and has a dc?

What he really needs to know / learn is how to plan his dives with the tools that are out there and not trust a bunch of people slacking online on a Friday to tell him / her how to do it

 

[SharkEsq]

Why not tell the OP what he needs to know:
first get certified for nitrox
second use nitrox and
third those dives are definitely worth doing .
Forth, use a computer and you will get credit for a bunch of time spent high up on the ship, so chances are he will be limited by tank size rather than no deco limits.

From his written account he is nitrox cert, does use it, and has a dc?

What he really needs to know / learn is how to plan his dives with the tools that are out there and not trust a bunch of people slacking online on a Friday to tell him / her how to do it

Yes, as I stated above, I dive nitrox, use a computer and have been on these wrecks before. I guess I could try to do dive planning, but I'm not sure I'd know what actual depths I'd be at and for how long, so was more curious if people had rule-of-thumb experience about them being a good or bad idea. One of the most popular dive shops doesn't do double dips very often, so was curious if that was for NoDeco reasons.