Breathing rate, air integrated computers and DCI correlation

[beaverdivers]

"Micro-bubble" bull**** piled on top of bull****. It is all about bubbles in your blood and tissues.

Micro-Bubbles are an idea. They are thought to be precursors of actual bubbles. Yes, It is theorical; such is the nature of DCS.

Yes, the idea of coming up slow is the same!

 

[lowviz]

...//... Yes, the idea of coming up slow is the same!

When ScubaPro gets around to changing their DC algorithm, you will become a believer too. I can wait, or not. I couldn't care less.

 

[rhwestfall]

calling Mark Powell...... oh Mark, you watching this?

 

[beaverdivers]

How does the algorithm interpret heart rate? DO you know?

So if my wife and I were doing identical dives in terms of workload, how would the computer interpret those heart rates? How would it adjust our profiles?

You must be in great shape w/ a resting heat rate of 45. ( Good for you! )

When using the heart rate ( HR ) feature you must personalize the algorithm by entering your resting HR and your maximum HR.

The Galileo analyses your heart rate pattern over time to determine workload with a sample rate of every 4 seconds. The HR is factored into the calculation of the No Stop time.

Since increased exercise while diving increases circulation which increases nitrogen uptake, the Galileo will give less No Stop time when you have a significant workload based on increased HR.

 

[beaverdivers]

When ScubaPro gets around to changing their DC algorithm, you will become a believer too.

The Scubapro dive computers employ a variable ideal ascent rate: its value ranges between 7 and 20m/min and the actual breakdown by depth range is listed in the table below.
depth
(m)
<6 <12 <18 <23 <27 <31 <35 <39 <44 <50 >50
speed
(m/min)
7 8 9 10 11 13 15 17 18 19 20
depth
(ft)
<20 <40 <60 <75 <88 <101 <115 <128 <144 <164 >164
speed
(ft/min)
23 26 29 33 36 43 49 56 59 62 66

Isn't 23 ft/min slow enough at a depth of less than 20'? Of course, this ascent doesn't include safety stops.

I believe this variable ascent program works nicely!

 

[lowviz]

Wow. That took way too long. The Uwatec Bottom timer is even better. Maybe you should be more aware of what you are pushing.

And no, 23 fpm for the final ascent is still "fast".

---------- Post added September 13th, 2013 at 09:13 PM ----------

I can wait until tomorrow for your answer. SP has closed for the day...

 

[beaverdivers]

Wow. That took way too long.

I thought you liked everything slow.

The Uwatec Bottom timer is even better.
And no, 23 fpm for the final ascent is still "fast".

23'/min. would be the fastest the Uwatec computers would want you to come up in the final 20'.

 

[redacted]

DC calculations of ascent rate can be way off from the truth. You need to understand the computer's limitations and be sure you are OK with them. I would be hesitant to use a computer that adjusts NDLs or stops based on their ascent rate calculations if the algorithm does not exclude short transient changes like when you lift your computer.

 

[beaverdivers]

DC calculations of ascent rate can be way off from the truth.

Not if you have a Swiss-made precision instrument, the accuracy is amazing.

 

[lowviz]

Yes, it can track arm waving to six decimal places.