Nitrox without dive computer?

[diversteve]

Get her an Oceanic BUD. It clps off anywhere or can go in a pocket. Oceanic - B.U.D. They're also $220 list.



It allows you to match algorithms with whatever you buy. Although I suspect the VEO uses the same one. Probably the Aeris also but it's been around longer so IDK.

Don't assume your computer won't fail either. It happens.

 

[Craig66]

Don't want to sound judgmental but unless Mrs OP is a table purist her lack of wanting a dive computer and desire to piggy back on OPs computer sounds very much like "trust me diving" and never a good idea.


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[GrumpyOldGuy]

Sharing a computer is not very smart. You have left the region of rigid planning via tables which have lots of padding and instead playing on the edge with computer which has very precise calculation (not accurate, but precise). It does not take much difference between divers to have one "safe" and the other "bent". Generally, a spouse is worth a couple hundred bucks for a computer.

 

[Craig66]

generally, a spouse is worth a couple hundred bucks for a computer.

I am sure there are people on the board that would beg to differ with you


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[aceupmysleeve777]

Do yourself and your diving a favor, buy a computer for each of you. Your bottom time gets killed using tables. And like other have said really no reason to dive EAN without a computer since your diving it to maximize your bottom time. You can adjust the sample rate of most computers but most are set at a 20 second sample rate out of the box. To keep it very simple your computer is redoing the tables for you every 20 seconds giving and taking away bottom time based on your depth that is almost always changing a little.
Another simple example is a basic table will give you a 10 min bottom time at 130ft, just a real quick logbook search shows a dive to 130ft for 40 mins. Computers are the way to go as well as having the knowledge of being able to use tables when you want or need to.

 

[Craig66]

You can adjust the sample rate of most computers but most are set at a 20 second sample rate out of the box. To keep it very simple your computer is redoing the tables for you every 20 seconds giving and taking away bottom time based on your depth that is almost always changing a little. to.

Correct me if I am wrong but I thought sample rate was related to the info available for download in PDCs allowing downloads. A shorter sample rate giving more info but using more memory. It is not as far as I recall related to function and dive calculations.


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[aceupmysleeve777]

Correct me if I am wrong but I thought sample rate was related to the info available for download in PDCs allowing downloads. A shorter sample rate giving more info but using more memory. It is not as far as I recall related to function and dive calculations.


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It was always explained by our rep that the sample rate was storing info along with using that info but it makes more sense that it's doing that more often than 20 seconds for nodeco thinking about it now. So I would say your right.

 

[drrich2]

To rephrase what others have expressed, there are 2 main ways to increase your NDL-allowed bottom time as an air diver using tables:

1.) Switch from tables to a computer (assuming typical multi-level dives; most don't do mainly strict square profiles, where the difference would be less).

2.) Switch from air to nitrox.

So you can see that certifying in nitrox use yet clinging to tables 'looks odd.'

Richard.

 

[Steve_C]

Unless you two are tied together it is highly unlikely that you two will actually dive exactly the same dive. One of you decides to look under a piece of coral. The other keeps floating along 10 ft off the bottom. You go up a bit to look around. She stays at depth. I could go on with lots more examples.

As a side benefit, if you are on a dive and your computer craps out and she has one it can be helpful in controlling your ascent especially if you find yourself doing a free ascent from 80 ft in 10 ft of viz.

 

[supergaijin]

I believe that every diver should have their own computer for diving.

That said, thousands of dives are made every year where the only person with a computer is the guide. I'm thinking specifically of my experiences in SE Asia, Egypt, and NZ. The only country that I have worked where computers were compulsory for every diver is here in the Maldives.

This is backed up by the amount of 'head-shaking' I get in response to the question posed during check-in: "Have you ever used a computer?"

FTR, I believe that every diver should have their own computer for diving. The reality is though that many, many vacation divers give their NDL info away to someone 'in charge'.