Suunto Vyper "Dive Attention Symbol"

Mark wrote:

> So my question, for you Suunto Vyper owners that have figured this out,
> is 1) how do a calculate a minimum or reasonable surface interval with
> the computer, and 2) when I do get a Dive Attention symbol, how long
> should I 'extend' my normal surface interval to?

You don't calculate a reasonable or minimum surface interval. SI has no
magical theraputic value. It's only benefit is eliminating enough N2 to
permit the next dive to complete within NDL. When your dive planner
shows you have enough no-stop time to complete the next dive, the SI is
long enough. If you follow your manuals advice, you will not run your
no-stop time to zero on any dive, so obviously you wouldn't plan your
second dive to use up all available no-stop time, which means you wait
until you planner shows more than enough time available. Switching to a
higher FO2 mix is more effective.

Mark wrote:

> So my question, for you Suunto Vyper owners that have figured this out,
> is 1) how do a calculate a minimum or reasonable surface interval with
> the computer, and 2) when I do get a Dive Attention symbol, how long
> should I 'extend' my normal surface interval to?

You don't calculate a reasonable or minimum surface interval. SI has no
magical theraputic value. It's only benefit is eliminating enough N2 to
permit the next dive to complete within NDL. When your dive planner
shows you have enough no-stop time to complete the next dive, the SI is
long enough. If you follow your manuals advice, you will not run your
no-stop time to zero on any dive, so obviously you wouldn't plan your
second dive to use up all available no-stop time, which means you wait
until you planner shows more than enough time available. Switching to a
higher FO2 mix is more effective.

I have dived tables for 10 years and just bought a Suunto Vyper dive
computer. I am confused re: the Dive Attention symbol. I have read
these groups and the comments. I have gotten this symbol and have not
violated the ascent rate. I will avoid any 'saw tooth' dives and see if
this makes a difference.

However, the manual suggest to "extend my surface interval". I cannot
find a suggested surface interval or desat time. The no-fly time is
always a least 12 hours so this does not help in planning a surface
interval before dive #2.

So my question, for you Suunto Vyper owners that have figured this out,
is 1) how do a calculate a minimum or reasonable surface interval with
the computer, and 2) when I do get a Dive Attention symbol, how long
should I 'extend' my normal surface interval to?

Mark wrote:

> So my question, for you Suunto Vyper owners that have figured this out,
> is 1) how do a calculate a minimum or reasonable surface interval with
> the computer, and 2) when I do get a Dive Attention symbol, how long
> should I 'extend' my normal surface interval to?

You don't calculate a reasonable or minimum surface interval. SI has no
magical theraputic value. It's only benefit is eliminating enough N2 to
permit the next dive to complete within NDL. When your dive planner
shows you have enough no-stop time to complete the next dive, the SI is
long enough. If you follow your manuals advice, you will not run your
no-stop time to zero on any dive, so obviously you wouldn't plan your
second dive to use up all available no-stop time, which means you wait
until you planner shows more than enough time available. Switching to a
higher FO2 mix is more effective.