I want to murder my computer and feed it to the fishies!

[ianr33]

If you had 6 minutes of deco, say at 10', that 7th minute is probably time to surface. i.e. you should take one minute moving from your 10' stop to the surface.

More likely the 7th minute is the 20 seconds it takes to ascent from 10 feet to the surface at 33ft/min but rounded up.

After my Predator clears deco at 10 feet the Time to Surface will read one minute.

 

[melanie.]

It's likely including time for a safety stop, even though you've completed deco stops. I've had a computer that did that.

AHH we keep posting at the same time. Ok.. but if it really wanted to do that.. why would it add ANOTHER safety stop after the deco was done? It should tell me really how long it wants to stay, and I will gladly stay. No reason for hiding stops in there

 

[ianr33]

I thought all safety stops by definition are optional?

Either way, if it wanted me to do more time, why would it not just add more minutes to my obligated time? Trying to "hide" it in there just seems pretty useless and inconvenient to me.

Long time since I did OW but IIRC recall correctly a safety stop is mandatory for dives deeper than 100 feet or within 3 letter groups of Z ( or something like that)

Why would it just not add more minutes to your obligated time? Because it's not the correct tool for the job you are trying to make it do. (Think I said that a few pages back)

Which end of an iphone should I use to hammer nails?

 

[Tortuga68]

So I've just done an hours deco,the last 30 minutes on 100% O2 and the computer wants an "optional" safety stop??!!

My Predator does not have a safety stop countdown and I'm guessing the X1 doesn't either. My point was that any computer with a safety stop countdown is really a recreational computer no matter what the sales literature may say.

i wonder why the technical computers don't include a safety stop? It may be that after doing a long deco the extra 3 minutes makes little difference or that the deco times already have that safety margin built into them

either way, if it wanted me to do more time, why would it not just add more minutes to my obligated time? Trying to "hide" it in there just seems pretty useless and inconvenient to me

ding ding ding!!1!

 

[melanie.]

I still find it ridiculous that it is capable of calculating a safe dive, but it is unable to show the correct numbers.

If I had a choice yes I would absolutely love to upgrade my computer. But that's not an option so it looks like I have to settle for trying to understand it the best I can. Sorry if you can't see where I am coming from.


Tortuga68 - are you serious? 10 pages of bickering just to say that it is adding a safety stop into the deco time? Wow you guys really make me work for answers lol

 

[Tortuga68]

Sometimes getting the 'right' answer depends on asking the right question

FWIW nobody is saying you have to upgrade your computer

 

[melanie.]

Sometimes getting the 'right' answer depends on asking the right question

FWIW nobody is saying you have to upgrade your computer

I can't figure out if I want to hug you are give you a swift kick in the ...

Nah they are just saying learn more then don't expect your computer to be any help End result still says one day soon I need another.

 

[Tortuga68]

Actually I think qute a few people suggested using your current computer as a bottom timer

Quite a few people also told you basically the same thing that Slamfire did; he just took the time to spell it all out in detail

 

[ianr33]

Melanie, when I did my deco course I used a bottom timer and tables. My Aeris compute came along for the ride. Comparing how it behaved to the V-planner generated tables taught me how to use it on "light" deco dives.

1)It is rather aggressive. Even though it's only a single gas computer (so doesn't know I'm breathing O2 from 20 feet) a few more minutes at 10 feet would clear it.For any single gas dive surfacing with the computer in the green rather than the yellow is a real good idea.
2)it's a Buhlmann computer. When V planner might be calling for a first stop at 40 feet computer has a ceiling of maybe 10 feet.
That also means spending time at 70 feet after a 120 foot dive will result in increased deco. V-planner doesn't care, 1 minute or 20 at 70 feet makes little difference.

So ,using it on a deco dive my first stop will be MUCH deeper than the computer wants. I stop at 20 feet until it clears deco,then ascend to 10 feet and wait till it gets into the green.

Now,none of the above may be relevant to your computer. My point is if you get a feel for the deco you should be doing you can use a recreational computer,but just following it blindly is not a good idea.

Eventually I got tired of messing with all this and bought a Predator.

If your dives are square profiles then tables/bottom timer are probably the way to go.

 

[melanie.]

Quite a few people also told you basically the same thing that Slamfire did; he just took the time to spell it all out in detail

And that is what I needed. It is ok to learn differently, and have to hear things a couple different ways for it to make sense.


Thanks Ianr33 - your sharing of experience is helpful. The next dives I will bring a copy of tables down with me to compare.