Suunto Vyper desat time

Mark wrote:
> I have dived tables for 10 years and just bought a Suunto Vyper dive
> computer. According to the PADI RDP if I dive 40 feet for 60 minutes I
> am an 'N' diver. If I have a surface interval for longer than 5:19 I am
> a 'new' (not 'A') diver. I was under the impression that this is my
> desat time. Time to desaturation.

It's not even close to desat time.

>I am aware that the Vyper displays
> the no-fly time, but does it display this desat time?

Did you read your manual? Chances are, if it doesn't mention it, it's
not there.

Mark wrote:
> I have dived tables for 10 years and just bought a Suunto Vyper dive
> computer. According to the PADI RDP if I dive 40 feet for 60 minutes I
> am an 'N' diver. If I have a surface interval for longer than 5:19 I am
> a 'new' (not 'A') diver. I was under the impression that this is my
> desat time. Time to desaturation.

It's not even close to desat time.

>I am aware that the Vyper displays
> the no-fly time, but does it display this desat time?

Did you read your manual? Chances are, if it doesn't mention it, it's
not there.

bullshark wrote:
> Mark wrote:
> > I have dived tables for 10 years and just bought a Suunto Vyper dive
> > computer. According to the PADI RDP if I dive 40 feet for 60 minutes I
> > am an 'N' diver. If I have a surface interval for longer than 5:19 I am
> > a 'new' (not 'A') diver. I was under the impression that this is my
> > desat time. Time to desaturation.
>
> It's not even close to desat time.

The simplest rule of thumb is 6 half-times of the longest compartment
tracked.

IIRC, the Vyper has a 480? minute compartment, so 6 * 480 = 42 hours.

However, I believe that somewhere in the manual it mentions that it can
penalize "naughty behavior" for up to 100 hours afterwords. Since the
Vyper is known to reduce M-value limits, logically putting 1+1
together, this appears to suggest that you could be fully desaturated
but nevertheless be presented with reduced dive limits because of a
previously naughty profile.

Is it then no wonder why some people pull batteries out of dive
computers to force a system reset?


BTW, also read the fine print on how the Vyper "interprets" whatever
Nitrox FO2% you put in, apparently because of its paranoia regarding
OxTox.

IIRC, there's also something wonky regarding repetitive dives with
Nitrox too, where the Vyper is apparently purposefully more paranoid
(conservative) than the more expensive Vytek model. Anyone recall
these specifics?


Overall, perhaps a better question would be to ask what other
brands/models of dive computer have RGBM-like characteristics, but has
successfully kept the Lawyers out of its software code and doesn't end
up being so damn overly conservative as the Vyper. It doesn't show up
on the first dive, but it is there by the second, and is in spades by
the 3rd or 4th day, even with as little as 2 dives per day.


-hh

bullshark wrote:
> Mark wrote:
> > I have dived tables for 10 years and just bought a Suunto Vyper dive
> > computer. According to the PADI RDP if I dive 40 feet for 60 minutes I
> > am an 'N' diver. If I have a surface interval for longer than 5:19 I am
> > a 'new' (not 'A') diver. I was under the impression that this is my
> > desat time. Time to desaturation.
>
> It's not even close to desat time.

The simplest rule of thumb is 6 half-times of the longest compartment
tracked.

IIRC, the Vyper has a 480? minute compartment, so 6 * 480 = 42 hours.

However, I believe that somewhere in the manual it mentions that it can
penalize "naughty behavior" for up to 100 hours afterwords. Since the
Vyper is known to reduce M-value limits, logically putting 1+1
together, this appears to suggest that you could be fully desaturated
but nevertheless be presented with reduced dive limits because of a
previously naughty profile.

Is it then no wonder why some people pull batteries out of dive
computers to force a system reset?


BTW, also read the fine print on how the Vyper "interprets" whatever
Nitrox FO2% you put in, apparently because of its paranoia regarding
OxTox.

IIRC, there's also something wonky regarding repetitive dives with
Nitrox too, where the Vyper is apparently purposefully more paranoid
(conservative) than the more expensive Vytek model. Anyone recall
these specifics?


Overall, perhaps a better question would be to ask what other
brands/models of dive computer have RGBM-like characteristics, but has
successfully kept the Lawyers out of its software code and doesn't end
up being so damn overly conservative as the Vyper. It doesn't show up
on the first dive, but it is there by the second, and is in spades by
the 3rd or 4th day, even with as little as 2 dives per day.


-hh

"Mark" <junk0604@bornplaydie.com> wrote in message
news:1160610210.693135.142420@c28g2000cwb.googlegr oups.com...
>I have dived tables for 10 years and just bought a Suunto Vyper dive
> computer. According to the PADI RDP if I dive 40 feet for 60 minutes I
> am an 'N' diver. If I have a surface interval for longer than 5:19 I am
> a 'new' (not 'A') diver. I was under the impression that this is my
> desat time. Time to desaturation. I am aware that the Vyper displays
> the no-fly time, but does it display this desat time?

With the Vyper you can run a simulation. First print out the dive planner no deco
times and simulate this dive, then check at intervals if the dive planner shows the
same no deco times. When the two dive planner printouts match, that should be your
"desat time" for that dive by the Vyper.

My Oceanic Prodigy shows nitrogen loading bars which may give some indication of its
desat time (when the bars go to zero). Nevertheless the "desat" time is mathematical
concept that depends on the model, and you may still have increased risk of DCS even
after the "desat" time.

Adam

"Mark" <junk0604@bornplaydie.com> wrote in message
news:1160610210.693135.142420@c28g2000cwb.googlegr oups.com...
>I have dived tables for 10 years and just bought a Suunto Vyper dive
> computer. According to the PADI RDP if I dive 40 feet for 60 minutes I
> am an 'N' diver. If I have a surface interval for longer than 5:19 I am
> a 'new' (not 'A') diver. I was under the impression that this is my
> desat time. Time to desaturation. I am aware that the Vyper displays
> the no-fly time, but does it display this desat time?

With the Vyper you can run a simulation. First print out the dive planner no deco
times and simulate this dive, then check at intervals if the dive planner shows the
same no deco times. When the two dive planner printouts match, that should be your
"desat time" for that dive by the Vyper.

My Oceanic Prodigy shows nitrogen loading bars which may give some indication of its
desat time (when the bars go to zero). Nevertheless the "desat" time is mathematical
concept that depends on the model, and you may still have increased risk of DCS even
after the "desat" time.

Adam

"Mark" <junk0604@bornplaydie.com> wrote in message
news:1160610210.693135.142420@c28g2000cwb.googlegr oups.com...
>I have dived tables for 10 years and just bought a Suunto Vyper dive
> computer. According to the PADI RDP if I dive 40 feet for 60 minutes I
> am an 'N' diver. If I have a surface interval for longer than 5:19 I am
> a 'new' (not 'A') diver. I was under the impression that this is my
> desat time. Time to desaturation. I am aware that the Vyper displays
> the no-fly time, but does it display this desat time?

With the Vyper you can run a simulation. First print out the dive planner no deco
times and simulate this dive, then check at intervals if the dive planner shows the
same no deco times. When the two dive planner printouts match, that should be your
"desat time" for that dive by the Vyper.

My Oceanic Prodigy shows nitrogen loading bars which may give some indication of its
desat time (when the bars go to zero). Nevertheless the "desat" time is mathematical
concept that depends on the model, and you may still have increased risk of DCS even
after the "desat" time.

Adam

I have dived tables for 10 years and just bought a Suunto Vyper dive
computer. According to the PADI RDP if I dive 40 feet for 60 minutes I
am an 'N' diver. If I have a surface interval for longer than 5:19 I am
a 'new' (not 'A') diver. I was under the impression that this is my
desat time. Time to desaturation. I am aware that the Vyper displays
the no-fly time, but does it display this desat time?

Mark wrote:
> I have dived tables for 10 years and just bought a Suunto Vyper dive
> computer. According to the PADI RDP if I dive 40 feet for 60 minutes I
> am an 'N' diver. If I have a surface interval for longer than 5:19 I am
> a 'new' (not 'A') diver. I was under the impression that this is my
> desat time. Time to desaturation.

It's not even close to desat time.

>I am aware that the Vyper displays
> the no-fly time, but does it display this desat time?

Did you read your manual? Chances are, if it doesn't mention it, it's
not there.

bullshark wrote:
> Mark wrote:
> > I have dived tables for 10 years and just bought a Suunto Vyper dive
> > computer. According to the PADI RDP if I dive 40 feet for 60 minutes I
> > am an 'N' diver. If I have a surface interval for longer than 5:19 I am
> > a 'new' (not 'A') diver. I was under the impression that this is my
> > desat time. Time to desaturation.
>
> It's not even close to desat time.

The simplest rule of thumb is 6 half-times of the longest compartment
tracked.

IIRC, the Vyper has a 480? minute compartment, so 6 * 480 = 42 hours.

However, I believe that somewhere in the manual it mentions that it can
penalize "naughty behavior" for up to 100 hours afterwords. Since the
Vyper is known to reduce M-value limits, logically putting 1+1
together, this appears to suggest that you could be fully desaturated
but nevertheless be presented with reduced dive limits because of a
previously naughty profile.

Is it then no wonder why some people pull batteries out of dive
computers to force a system reset?


BTW, also read the fine print on how the Vyper "interprets" whatever
Nitrox FO2% you put in, apparently because of its paranoia regarding
OxTox.

IIRC, there's also something wonky regarding repetitive dives with
Nitrox too, where the Vyper is apparently purposefully more paranoid
(conservative) than the more expensive Vytek model. Anyone recall
these specifics?


Overall, perhaps a better question would be to ask what other
brands/models of dive computer have RGBM-like characteristics, but has
successfully kept the Lawyers out of its software code and doesn't end
up being so damn overly conservative as the Vyper. It doesn't show up
on the first dive, but it is there by the second, and is in spades by
the 3rd or 4th day, even with as little as 2 dives per day.


-hh