wanting to upgrade from nitek duo

[Candiru]

I recently got back from a dive trip in Cozumel. The group consisted of the four same divers everyday. I noticed that I was constantly running out of no decompression time while everybody in my group was exiting with 40 minutes plus. I had made sure not to add any conservative levels. My buddy was diving oceanic and I'm not sure what everybody else was diving. So I made up my mind to sell my computer and get a different one. Any suggestions for a more liberal computer? I do occasionally dive nitrox.

[paddler3d]

Algorithms that tend to be more liberal on the 1st dive, tend to be less liberal on repetitive dives.

Avoid Suunto.

Aeris and Oceanic tend to be more 'liberal'.

[Scott L]

This sticky post within this same forum is quite informative...

http://www.scubaboard.com/forums/4732031-post1.html

[fire_diver]

Lund, I dive a Nitek Duo and I love it. If you hate your so much, I'll be glad to take it in and give it a good home. I could use it as a backup.

[Candiru]

Whoa, just to be clear I don't hate my duo. I have greatly enjoyed it, I was just shocked by the nitrogen loading differences between the duo and oceanic.

[noreastDIVER84]

I have a Nitek Duo and an Aeris Compumask and I have found the Nitek to be on the more conservative side, but on repetitive dives I find that they both equal out to be closer.

[ianr33]

I have an Aeris (Oceanic) computer. If you push it all the way up to just touching the red it is extremely liberal. I certainly would not choose to surface with it in that condition. Would not be surprised if your Duo corresponded roughly to the Oceanic going back into the green rather than the yellow caution zone.

If you want a really liberal computer lash out the big bucks for a Shearwater Predator and set the gradient factors to 100,100. That would give you long NDL times. Just dont blame me if you get bent!

[scubafanatic]

Algorithms that tend to be more liberal on the 1st dive, tend to be less liberal on repetitive dives.

Avoid Suunto.

Aeris and Oceanic tend to be more 'liberal'.

Agreed, Oceanics (like my Pro Plus IIs) are said to be 'liberal'....and my Cochrans have a user adjustability capability where they can be made either more liberal or more conservative, I use that adjustability of the Cochrans to 'sync' them with my Oceanics so they are pretty consistent with each other. My Atomic Cobalts (which I haven't yet dove) are also user adjustable......you can control parameters by being able to select 3 broad settings (conservative/moderate/aggressive)...plus you can also enter in your age with provides additional adjustment...if you lie to the computer about your age, you can make it more aggressive (younger) or conservative (older).

[Bill eubanks]

go with a x1 liquivision with v planner

[NCadiver]

I recently got back from a dive trip in Cozumel. The group consisted of the four same divers everyday. I noticed that I was constantly running out of no decompression time while everybody in my group was exiting with 40 minutes plus. I had made sure not to add any conservative levels. My buddy was diving oceanic and I'm not sure what everybody else was diving. So I made up my mind to sell my computer and get a different one. Any suggestions for a more liberal computer? I do occasionally dive nitrox.

Can you give us depths and time on these dives and were they using nitrox?

[Kern]

If you want a really liberal computer lash out the big bucks for a Shearwater Predator and set the gradient factors to 100,100. That would give you long NDL times. Just dont blame me if you get bent!

The Due runs ZHL 16 I think. What does the Predator run?

[Kern]

Can you give us depths and time on these dives and were they using nitrox?

40 minutes difference for similar profiles seems quite a lot, it would be interesting to see some details.

[ianr33]

The Due runs ZHL 16 I think. What does the Predator run?

Predator runs Buhlmann ZHL-16C with user setable gradient factors. After playing around with those I arrived back at the default setting of 35/80. For the dives I'm doing (max around 200,usually less) That seems to match up fairly well with V-Planner on +2.

I'm guessing that the Duo is actually running a modified,more conservative,algorithm than pure Buhlmann??

[drbill]

Old geezers like me enjoy the extra conservativeness... especially when I used to do repetitive dives in the 180-200 ft depth range. I dive two computers (the other a Tec 2G) and use the Nitek Duo as my primary, following (or doubling) its recommendations on deco... but have a "second opinion" if I need one.

Besides, for old geezers or others afflicted with poor vision, the Nitek Duo is very readable compared to many other dive computers.