Home | Contact Us | FAQ | Search & Site Map | Link to Us
Sign In | Join | Other 45 Sites in Network
Home
ArticlesDiving DestinationsLearning Scuba DivingMarine LifeMiscellaneous
Discussion GroupsGeneralScuba EquipmentScuba LocationsAustralian ScubaUK Scuba
DirectoryScuba Clubs

Scuba Forum / UK Scuba / October 2005

Tip: Looking for answers? Try searching our database.

dive computer

Thread view: 
Enable EMail Alerts  Start New Thread
Thread rating: 
Brendan Kenneally - 13 Sep 2005 23:02 GMT
Hi anybody out there know a good cheap new dive computer that's easy to use?
I am a new diver and would appreciate any help.
Thanks in advance
Brendan
Ken - 13 Sep 2005 23:25 GMT
> Hi anybody out there know a good cheap new dive computer that's easy to
> use?
> I am a new diver and would appreciate any help.
> Thanks in advance
> Brendan

For the money, let alone the features, ruggedness, ease of use and wide
acceptance among divers I would say the Suunto Vyper is hard to beat.

Ken
Jason - 13 Sep 2005 23:39 GMT
> For the money, let alone the features, ruggedness, ease of use and wide
> acceptance among divers I would say the Suunto Vyper is hard to beat.

If you like doing lots and lots of deco.

Jason

Signature

See http://www.scuba-addict.co.uk/ for UK diving reports and the UK
Underwater Visibility Database. View the database or add your own report

CAS - 13 Sep 2005 23:59 GMT
>> For the money, let alone the features, ruggedness, ease of use and wide
>> acceptance among divers I would say the Suunto Vyper is hard to beat.
>
> If you like doing lots and lots of deco.

's got a gauge mode...

:op

CAS
Jason - 14 Sep 2005 00:22 GMT
>>> For the money, let alone the features, ruggedness, ease of use and wide
>>> acceptance among divers I would say the Suunto Vyper is hard to beat.
>>
>> If you like doing lots and lots of deco.
>>
> 's got a gauge mode...

What makes me laugh is Suunto's advertising campaign. That whole hand
signals thing. And they're yet to feature, If you think I'm doing those
stops, you're joking, Bye. Which must be the most common hand signal a
Vyper diver sees.

Jason

Signature

See http://www.scuba-addict.co.uk/ for trip reports including
the Costa Blanca, Gibraltar, Gran Canaria and the UK

Lee Bell - 14 Sep 2005 12:30 GMT
>> For the money, let alone the features, ruggedness, ease of use and wide
>> acceptance among divers I would say the Suunto Vyper is hard to beat.
>
> If you like doing lots and lots of deco.

You hit that one right on the head.

I don't know if they're still available, but if they are, Genesis, Aeris and
Oceanic all make versions of the same hockey puck sized/shape nitrox
computer.  They used to come in both one and two button versions.  The two
button version is a lot more user friendly than the one button models I
have, but also noticeably more expensive.  All of these models are, by
design, the same size as the normal depth gauge module, allowing the
customer to wear them on the wrist or insert them into a console they
already have.  They all do decompression calculations and handle nitrox up
to 50%.

Before anybody says it, I recommend a nitrox computer to anyone that is
buying a computer.  While some may not ever use nitrox, most will and the
few extra dollars you spend up front are a lot less than what you'll spend
to replace the computer later.

Lee
Ken - 14 Sep 2005 16:41 GMT
>>> For the money, let alone the features, ruggedness, ease of use and wide
>>> acceptance among divers I would say the Suunto Vyper is hard to beat.
[quoted text clipped - 17 lines]
> few extra dollars you spend up front are a lot less than what you'll spend
> to replace the computer later.

Absolutely. I do appreciate the deco position - Suunto wants you to hang
around longer than most folk. OTOH I don;t know about you guys, but unlike
the characters invideo games I only have ONE life, and I'd rather play it
safe. If that means doing a bit more deco, that's what I'll do. Except I
don't do deco diving, so it's not really an issue personally.

Ken
Jason - 14 Sep 2005 19:47 GMT
> around longer than most folk. OTOH I don;t know about you guys, but unlike
> the characters invideo games I only have ONE life, and I'd rather play it
> safe. If that means doing a bit more deco, that's what I'll do. Except I
> don't do deco diving, so it's not really an issue personally.

So you don't do deco, probably don't know a lot about it, but do feel the
need to condescend to those of us that do it regularly? And at times, it
isn't a bit more. It's a hell of a lot more.

Jason

Signature

http://www.scuba-addict.co.uk/boatspaces/ for UK dive spaces

Ken - 14 Sep 2005 19:56 GMT
>> around longer than most folk. OTOH I don;t know about you guys, but
>> unlike
[quoted text clipped - 5 lines]
> need to condescend to those of us that do it regularly? And at times, it
> isn't a bit more. It's a hell of a lot more.

Oh boy. Just because I don't do deco doesn't mean I don't now about it, it
means I choose not to do it. What do you know what I know about and what I
don't? Is it not the case that it is you who is condescending therefore? I
did not pass judgement on your or anyone's abilities, knowledge, judgement
on this issue, I merely made the statement that while I agree that Suunto
models suggest longer deco times, it was a feature which by the nature of
the diving I choose to take is of no relevance to me. I further expressed my
willingness, if caught needeing deco for whatever reason, to hang on the
line a little longer for the sake of my continued good health.

Here's me thnking there was lots of room in the oceans for all of us!

Ken
Jason - 14 Sep 2005 20:05 GMT

> Oh boy. Just because I don't do deco doesn't mean I don't now about it, it
> means I choose not to do it. What do you know what I know about and what I
> don't? Is it not the case that it is you who is condescending therefore? I

You're commenting on something you don't do. You're also make statements
about only having ONE life and implying that not wishing to follow
Suunto's algorithms is in some way unsafe and maybe even reckless.

> did not pass judgement on your or anyone's abilities, knowledge, judgement
> on this issue, I merely made the statement that while I agree that Suunto
> models suggest longer deco times, it was a feature which by the nature of
> the diving I choose to take is of no relevance to me. I further expressed
> my willingness, if caught needeing deco for whatever reason, to hang on
> the line a little longer for the sake of my continued good health.

So if someone came out with a new computer tomorrow that have 3 times for
deco than anything currently on the market, you'd happily do all those
stops too would you? After all, it's safer. But then so is staying out of
the water. And I'm not going to do that either.

Jason

Signature

http://www.scuba-addict.co.uk/ for Aussie diving reports including
Cape Tribulation, Cairns, Airlie Beach, Exmouth and the HMAS Swan

Ken - 14 Sep 2005 20:17 GMT
>> Oh boy. Just because I don't do deco doesn't mean I don't now about it,
>> it
[quoted text clipped - 6 lines]
> about only having ONE life and implying that not wishing to follow
> Suunto's algorithms is in some way unsafe and maybe even reckless.

No. I'm commenting I don't do deco through knowledge and choice, not through
ignorance and fear. I manage the risk I take, and the balance of the risk
with respect to my diving habits is that I prefer no-deco diving, the
simpler equipment setups that are compatible with this form of diving, and
the great enjoyment I get from it as it is, as I do it. I need no more buzz.

> So if someone came out with a new computer tomorrow that have 3 times for
> deco than anything currently on the market, you'd happily do all those
> stops too would you? After all, it's safer. But then so is staying out of
> the water. And I'm not going to do that either.

Any time you want to stop diving is your business. How I choose to do my
diving is mine.

How come it's OK for ANY diver to call ANY dive to an end for ANY reason,
but it appears not OK for this diver to call an end to his dive when he gets
to the end, or very close to the end, of no-deco time?

Ken
Jason - 14 Sep 2005 20:32 GMT
> How come it's OK for ANY diver to call ANY dive to an end for ANY reason,
> but it appears not OK for this diver to call an end to his dive when he
> gets to the end, or very close to the end, of no-deco time?

I don't care when you finish your dive, or indeed anything about your
diving really. I object to the implication that following non-Suunto
algorithm deco is somehow dangerous. Particularly as one of my computers
uses the well respected Buhlmann algorithm. And it always clears way
before my buddy's Suunto, especially on accelerated deco. I have no idea
why a Vytec clears so slowly when using higher mixes.

Jason

Signature

See http://www.scuba-addict.co.uk/ for trip reports including
the Costa Blanca, Gibraltar, Gran Canaria and the UK

Ken - 14 Sep 2005 21:33 GMT
>> How come it's OK for ANY diver to call ANY dive to an end for ANY reason,
>> but it appears not OK for this diver to call an end to his dive when he
>> gets to the end, or very close to the end, of no-deco time?
>
> I don't care when you finish your dive, or indeed anything about your
> diving really.

Suits me.

> I object to the implication that following non-Suunto
> algorithm deco is somehow dangerous.

That was not any impression I was trying to impart. If it wasn't clearly
stated, it wasn't intended.

> Particularly as one of my computers
> uses the well respected Buhlmann algorithm. And it always clears way
> before my buddy's Suunto, especially on accelerated deco. I have no idea
> why a Vytec clears so slowly when using higher mixes.

Try asking Suunto.

Ken
Nigel Hewitt - 14 Sep 2005 22:47 GMT
>> Particularly as one of my computers
>> uses the well respected Buhlmann algorithm. And it always clears way
>> before my buddy's Suunto, especially on accelerated deco. I have no
>> idea why a Vytec clears so slowly when using higher mixes.
>
> Try asking Suunto.

But this is the whole question.

Professor Bühlmann's work at Zurich University has been
published and chewed over for years. It is a standard by
which others are judged. I am not aware of any published,
pier reviewed, material from Suunto. Bühlmann has nothing
to prove. Suunto, in taking lots longer, is the problem.

There is a level of conservatism which is beyond reason. When
the risk involved in staying in the water is greater than the risk
of ascending. One of the concerns of the Suunto is that it clicks
in long deco rather suddenly and compromises the divers gas
reserves.

My preference is a computer with zero conservatism as it is
easy to do longer stops than required but on the day you have
a problem you want shortest time to surface.

nigelH
Jason - 14 Sep 2005 23:32 GMT
>>> before my buddy's Suunto, especially on accelerated deco. I have no
>>> idea why a Vytec clears so slowly when using higher mixes.
>>
>> Try asking Suunto.
>
> But this is the whole question.

Indeed. Swap to something richer than about 75% and your stops more or
less halve on Buhlmann. They also do on my Cochran, which isn't Buhlmann
based, and they do on my Apeks Quantum which is. They don't on the Vytec.
I don't know why. I'd be interested if someone has access to proper RGBM
rather than the fudged version that Suunto use if they could run some
profiles through that.

> My preference is a computer with zero conservatism as it is easy to do
> longer stops than required but on the day you have a problem you want
> shortest time to surface.

Agreed. I can always add in deep stops. I can add in 5 mins from 6m to the
surface. I also know when it's rough and shallow stops are a bad idea. I
know when there's been a current and I was knackered. Coz I've got a brain
in my head, and some stupid computer doesn't. And doing stops because
Suunto say so is banal.

Jason

Signature

See http://www.scuba-addict.co.uk/ for Caribbean trip reports
to Aruba, Cuba, Grand Bahama, Barbados, St Lucia and Mexico

Ken - 15 Sep 2005 00:10 GMT
>>> Particularly as one of my computers
>>> uses the well respected Buhlmann algorithm. And it always clears way
[quoted text clipped - 4 lines]
>
> But this is the whole question.

Quite! Only they seem to know the answer (assuming they do) but appear
reluctant to share it with others.

> Professor Bühlmann's work at Zurich University has been
> published and chewed over for years. It is a standard by
> which others are judged. I am not aware of any published,
> pier

(nice typo, given the circumstances!)

> reviewed, material from Suunto. Bühlmann has nothing
> to prove. Suunto, in taking lots longer, is the problem.
[quoted text clipped - 4 lines]
> in long deco rather suddenly and compromises the divers gas
> reserves.

Yes. However, if you are using a guide (Suunto model) which suggests you
stay in the water longer and you know it, the extra gas requirement should
have been planned for. You should not, then, be running out of gas becuase
of your (possibly overstated) deco requirements.

> My preference is a computer with zero conservatism as it is
> easy to do longer stops than required but on the day you have
> a problem you want shortest time to surface.

Personally I'd rather have a margin for error built in - I'd rather have a
bit of conservatism in other words. As to surfacing in the shortest possible
time and doing longer stops than required, that's another issue. AFAIK (and
being a tad facetious) you don't HAVE to ascend as soon as your computer's
deco requirements are met, nor do you HAVE to stay down just 'cos your
computer says so.

Ken
Matthias Voss - 15 Sep 2005 10:06 GMT
> There is a level of conservatism which is beyond reason. When
> the risk involved in staying in the water is greater than the risk
> of ascending. One of the concerns of the Suunto is that it clicks
> in long deco rather suddenly and compromises the divers gas
> reserves.

Right to the point.
This behaviour nearly led to an accident. We were diving the
 HMS Stubborn, bottom depth 58m.
Near the end of our scheduled bottom time, a diver signaled
problems and gave signs he wanted to go up. The remaining 2
of us decded they we should not follow his rapid ascent
given our deco obligation of about 25-30 minutes, and our
valiant surface support.
His ascent was stopped by another diver at 24m at the anchor
chain who realized his worried state, and turned into a
controlled one.
Later he explained the reason for his sudden concern, which
turned out to be a sudden obligation updrift on his Suunto
from some minutes to more than 45.
His "fault" was 2-fold:
a)He attributed to much of relevance to the computer
b) he thought he would be short on gas following the computer
c) he did not alert us of the actual cuase of his concern (
I might have shown him my Aladin ( VR3 froze on this dive)

Matthias

> My preference is a computer with zero conservatism as it is
> easy to do longer stops than required but on the day you have
> a problem you want shortest time to surface.
>
> nigelH
Jerome Meekings - 15 Sep 2005 11:12 GMT
> > There is a level of conservatism which is beyond reason. When
> > the risk involved in staying in the water is greater than the risk
[quoted text clipped - 23 lines]
>
> Matthias

Thank you for this interesting example.

There are some very important points.
1)
> ( VR3 froze on this dive)

related to this problem and

2)

> a sudden obligation updrift on his Suunto
> from some minutes to more than 45.

3)

Some divers are much too reliant on computers on their wrists and forget
to use the one between their ears

and of course b) and c)

<relevant to my dives and my choices>

to me it is not clear that there are any `mix/deep dive` computers that
are as reliable as the ones designed for recreational diving.

FWIW & AFIK on the VR3 if you miss or shorten a stop it sulks and tells
you to go to tables.

So far on all my deep dives I have used tables and will continue to do
so. I only use computers as bottom timers and presure gages and will
continue to do so for now. Though I would really like a good computer
for all my dives.

Deep/mix dives are on tables and deviations are planned for. Rec dives
are on computers.

</relevant to my dives and my choices>

>replace spamblock with my family name to e-mail me
Matthias Voss - 15 Sep 2005 16:26 GMT
Hello,

>>This behaviour nearly led to an accident. We were diving the
>>  HMS Stubborn, bottom depth 58m.
[quoted text clipped - 25 lines]
>
> related to this problem and

Well the freezing did not seem to be related to this dive,
but to fate, Murphy, anything. After going 3 times through
the unplugging battery, reinstall ceremony and some rain
dancing round it, it worked again. With the same battery.

Needless to say, that on this same dive my Aladin started
working only at 3 minutes into the dive.
Saved some deco time ;-)

> 2)
>>a sudden obligation updrift on his Suunto
>>from some minutes to more than 45.

This Wienke fudge factors are just crazy.

> 3)
>
> Some divers are much too reliant on computers on their wrists and forget
> to use the one between their ears

Exactly. While I regard this dive as a rec dive, when done
with air, it still qualifies for the same characteristics as
any rec or technical dive. Know your depth and time, and
have a clear plan of your decompression schedule in advance.
It helps writing it down to a slate, too....

> and of course b) and c)
>
> <relevant to my dives and my choices>
>
> to me it is not clear that there are any `mix/deep dive` computers that
> are as reliable as the ones designed for recreational diving.

While it seems, at the same time, that some designs which
were aimed at some nebulous mix of diving, just fail to work
in a sensible way, or quit working altogether from task
overload.

> FWIW & AFIK on the VR3 if you miss or shorten a stop it sulks and tells
> you to go to tables.

Yes. Still it keeps on doing sensible calculations. The deep
stops are just a bit too long, and to far spaced for deeper
dives. Too long especially when you don't switch gasses.

> So far on all my deep dives I have used tables and will continue to do
> so. I only use computers as bottom timers and presure gages and will
[quoted text clipped - 3 lines]
> Deep/mix dives are on tables and deviations are planned for. Rec dives
> are on computers.

I extend this favor to rec dives as well. For a given bottle
size you can just do three standard decompressions on any
dives, say, beyond 30m, nearly regardless of time and depth.

F.I. for a 15l bottle, 30" at 30/22/15m, 1' at 12m, 2' at
9m, 4' at 6, 6-12' at 3m.

Matthias
Oliver Vecernik - 15 Sep 2005 17:46 GMT
Hi Matthias,

nice to meet you here again... :-)

> F.I. for a 15l bottle, 30" at 30/22/15m, 1' at 12m, 2' at
> 9m, 4' at 6, 6-12' at 3m.

Let's say 40m/25':

According to Deco 2000: 1/4/8/16'

DDPlan gives following segtimes with GF 10/90% starting at 24m:
2/1/1/1/2/3/6/11' (on air, ~2100l gas consumption).  Deepest effective
stop is 27m.  This gives ascent & deco of ~28' against 29' on Deco 2000.

Would you really do this according to your suggestion (~20')?

Signature

Regards
Oliver

Matthias Voss - 15 Sep 2005 20:09 GMT
Hi Oliver,

> Hi Matthias,
>
> nice to meet you here again... :-)

Pleasure returned ;-)

>>F.I. for a 15l bottle, 30" at 30/22/15m, 1' at 12m, 2' at
>>9m, 4' at 6, 6-12' at 3m.
>
> Let's say 40m/25':
>
> According to Deco 2000: 1/4/8/16'

Not close. From Deco 92/2: 40m> read 42m, 25min bottom time
gives waht you suggest, but  Gas volume of 3710l.
So, impossible with a 15l bottle.

Remember I did not care to give a bottom time, but condensed
what has proven right from my experience, from the kind of
diving I do. That means returning form depth with a pressure
of 120-130 bars, with a starting pressure of 200 bars.
This leaves me a) with a feasable decompression obligation,
b) with some headroom for emergencies.

The most meaningful tool here is not the computer, but the
pressure gauge.

> DDPlan gives following segtimes with GF 10/90% starting at 24m:
> 2/1/1/1/2/3/6/11' (on air, ~2100l gas consumption).  Deepest effective
> stop is 27m.  This gives ascent & deco of ~28' against 29' on Deco 2000.
>
> Would you really do this according to your suggestion (~20')?

Anytime. A bit more in warm water. In warm water with a 15l
bottle, you're out of the water after one hour, almost
regardless of depth, that is, for any depth below 30m...
But to be fair, I must confess, that with a 15l bottle I
have not dived anything shallower than 32 m.

Matthias
Oliver Vecernik - 14 Sep 2005 20:39 GMT
Hi Ken,

> No. I'm commenting I don't do deco through knowledge and choice, not through
> ignorance and fear. I manage the risk I take, and the balance of the risk
> with respect to my diving habits is that I prefer no-deco diving, the
> simpler equipment setups that are compatible with this form of diving, and
> the great enjoyment I get from it as it is, as I do it. I need no more buzz.

I own the Cobra.  It has the same deco model as the Vyper (can't proof
that, but I was told).  I can tell you, that although deco times are
quite long I got a skin rush following the instructions (the manual btw
tells it should *not* be used for deco diving) even during so called
'no-deco' dives.  Did you know that every dive deeper than about 10m is
a deco dive? The Vyper doesn't tell you anything about a diving profile.
I switched to Deco 2000 (table) and since then my profiles changed
significantly and the most important thing for me: it works! I havn't
got troubles anymore since then.

I mainly use my Cobra as bottom timer now.  That's the best job it can
do for me.  ;-)

Signature

Regards
Oliver

Jerome Meekings - 15 Sep 2005 11:12 GMT
>   Did you know that every dive deeper than about 10m is
> a deco dive?

FWIW that should be "every dive is a deco dive"
>replace spamblock with my family name to e-mail me
Oliver Vecernik - 15 Sep 2005 11:26 GMT
>>   Did you know that every dive deeper than about 10m is
>> a deco dive?
>
> FWIW that should be "every dive is a deco dive"

Ack.  I also found some evidence of deco problems after very long dives
between 6m and 7m.  I just meant as a rule of thumb not literally...  ;-)

Signature

Regards
Oliver

Keith S. - 15 Sep 2005 20:14 GMT
> No. I'm commenting I don't do deco through knowledge and choice, not through
> ignorance and fear.

Do you not do PADI safety stops then? That's deco. They might
claim otherwise for legal reasons, but that's what it is.

- Keith
Ken - 15 Sep 2005 22:48 GMT
>> No. I'm commenting I don't do deco through knowledge and choice, not
>> through ignorance and fear.
>
> Do you not do PADI safety stops then? That's deco. They might
> claim otherwise for legal reasons, but that's what it is.

Of course it is and of course I do, usually. Thought to be honest, like many
folk, during so many dives I drift upward so slowly that I pass through the
"safety stop" without stopping and yet have done a dive according to the
letter of that law - even though the dreaded reverse profile may have crept
in. But that's another heated debate which we've done before.

Ken
BarryNL - 15 Sep 2005 09:11 GMT
>  
>
[quoted text clipped - 17 lines]
> stops too would you? After all, it's safer. But then so is staying out of
> the water. And I'm not going to do that either.

Here's my understanding of what the computers are doing. The bends risk
basically falls on a normal distribution (for those who did
probability/statistics at school). The computer isn't telling you how to
dive so you don't get bent - it's telling you how to dive so your
probability of getting bent is way down the tail end of the probability
curve.

It doesn't matter how much deco you do, you are always going to have
some risk of getting bent, the question is what level of risk are you
(or the computer manufacturers) prepared to accept as safe (I've heard 1
in 30,000 quoted as the level from accident analysis). It's simply that
some models leave you further down the tail end of the probability curve
than others. The question seems to be not which model prevents you
getting bent, but do you want a model with a 1:30,000 chance or do you
want the extra deco that gives you a 1:60,000 chance?

Signature

"If a man empties his purse into his head, no man can take it away from
him. An investment in Knowledge always pays the best Interest." -
Benjamin Franklin

Oliver Vecernik - 15 Sep 2005 10:06 GMT
> It doesn't matter how much deco you do, you are always going to have
> some risk of getting bent, the question is what level of risk are you
[quoted text clipped - 4 lines]
> getting bent, but do you want a model with a 1:30,000 chance or do you
> want the extra deco that gives you a 1:60,000 chance?

In my opinion you can't tell, because it even may depend on your
personal condition, which varies from day to day.  You can do a dive on
one day without any problems and get bent another day with exactly the
same dive profile.  No computer will help deciding what to do but the
one between your ears.  There are so many reasons which are not
calculated within a computer or even are not fully understood by
scientists that it's always a good practice "to keep on the safe side".

I personally don't mind to do some more minutes deco or deep stops even
on so called no-deco dives, but there could be situations where to keep
in water is more dangerous than ascending.  It depends on the situation.

Signature

Regards
Oliver

Ken - 15 Sep 2005 10:41 GMT
> Here's my understanding of what the computers are doing. The bends risk
> basically falls on a normal distribution (for those who did
[quoted text clipped - 11 lines]
> you want a model with a 1:30,000 chance or do you want the extra deco that
> gives you a 1:60,000 chance?

Yes.

I don't know where on the Gaussian curve these various models and
manufacturers place you. While each diver is an individual and each dive is
specific to itself, there are more things in common betwwen divers and dive
profiles than there are differences between them. The tendency to get bent
on a particualr dive probably fits aGaussian curve given that the
physiological variables which influence an individual's propoensity to get
are also normally distributed.

The "normal range" for many physilogical variables is set at +/- 2SD from
the mean, so that the normal range encompasses 95-97% of the population.
Beyond this, at one end are the folk who never get bent whatever, and these
are of no concern. Its the other folk at the "easily bent" end of the
spectrum that really need looking after. Using the +/- 2SD model, that would
mean that around 2% - 1 in 50 divers - might get bent even if they followed
the computer's advice. As the incidence of bends is much lower than this on
deco dives, one assumes the computer manufacturers are setting the limits of
their computers beyond +/- 2SD - but are they setting it at +/- 3, 4, 5, n
SD?

Ken
Pete Young - 15 Sep 2005 14:12 GMT
> around longer than most folk. OTOH I don;t know about you guys, but unlike
> the characters invideo games I only have ONE life, and I'd rather play it
> safe. If that means doing a bit more deco, that's what I'll do. Except I

The trouble with this theory is that sometimes staying in the water is
more dangerous than getting out. Thinking particularly of the situation
where divers are drifting under a buoy in a 2-knot current and the
weather conditions are worsening. As a Coxwain in that situation,
I'd much rather have the divers up when they can come up than
have them below the surface doing un-necessary stops.

On the other hand, I love to dive with Suunto divers. My
Cochrane set to 0 conservatism is guaranteed to get me
out of the water so far ahead of the Suunto divers that I
get to eat their lunch!

-- Pete
Ken - 15 Sep 2005 16:39 GMT
>> around longer than most folk. OTOH I don;t know about you guys, but
>> unlike
[quoted text clipped - 7 lines]
> I'd much rather have the divers up when they can come up than
> have them below the surface doing un-necessary stops.

Each circumstance has its particualr risk v benefit analysis. You mention a
valid, but v particualr situation. In other circumstances, it may be better
for the divers to stay in water longer.

> On the other hand, I love to dive with Suunto divers. My
> Cochrane set to 0 conservatism is guaranteed to get me
> out of the water so far ahead of the Suunto divers that I
> get to eat their lunch!

Sure you can. But there's more to it than that. On the Thistlegorm recently,
thanks to low SAC and Nitrox my son and I were the first under and last up
on both dives, never going into deco. The trip back was on very lumpy water
so many could not manage their babaganouche and spicy chicken thighs, so we
ate theirs instead.  :))

Ken
Adam Helberg - 15 Sep 2005 07:26 GMT
>> For the money, let alone the features, ruggedness, ease of use and wide
>> acceptance among divers I would say the Suunto Vyper is hard to beat.
>
> If you like doing lots and lots of deco.
>
> Jason

I'd rather do lots of deco than suffer brain or spinal-cord damage.

Adam
Matthias Voss - 15 Sep 2005 10:08 GMT
>>>For the money, let alone the features, ruggedness, ease of use and wide
>>>acceptance among divers I would say the Suunto Vyper is hard to beat.
>>
>>If you like doing lots and lots of deco.
>>
>>Jason

> I'd rather do lots of deco than suffer brain or spinal-cord damage.

How do you know you don't have already?

Matthias
Adam Helberg - 30 Oct 2005 04:38 GMT
>>>>For the money, let alone the features, ruggedness, ease of use and wide
>>>>acceptance among divers I would say the Suunto Vyper is hard to beat.
[quoted text clipped - 8 lines]
>
> Matthias

I probably do, but not from diving.

Adam
BarryNL - 14 Sep 2005 07:27 GMT
> Hi anybody out there know a good cheap new dive computer that's easy to use?
> I am a new diver and would appreciate any help.
> Thanks in advance
> Brendan

You can pick up the Mares M1 fairly cheap. Excellent computer in my
opinion and also has nitrox so you don't have to upgrade later.

Signature

The law, in its majestic equality, forbids the rich as well
as the poor to sleep under bridges, to beg in the streets,
and to steal bread. - Anatole France.

Danny Burchett - 14 Sep 2005 07:47 GMT
>Hi anybody out there know a good cheap new dive computer that's easy to use?
>I am a new diver and would appreciate any help.
>Thanks in advance
>Brendan

Personally I am a fan of the aladin computers, big easy to read
numbers and no sill amount of stops like the sunto. Everyones opinion
will differ, see if you can borrow a couple and try them to see which
you like.

Danny
The box said windows 98 or better, so I installed Linux

Header is false, correct is Danny at danshome dot org
brandwoodj - 14 Sep 2005 22:44 GMT
QUOTE=Brendan Kenneally]Hi anybody out
there know a good cheap new dive computer that's easy to use?
I am a new diver and would appreciate any help.
Thanks in advance
Brendan

Hi Brendan,
I read this thread and it moved me to contribute...
A computer is exactly that, a PCB, components, software, a casing, a
battery and a design team's interpretation of a marketing team's
understanding of what their target market segment (and there are many of
them) want. The fact is that they all have shortcomings one way or
another.

FYI - The first computer I bought was a Suunto Cobra which is a gas
integrated console version of the Vyper. For no-stop single gas nitrox
diving it served me very well for my first 50 dives. It is true that
Suunto's are pretty conservative and I was often the first to 'call time'
but thats no bad thing when you are gaining experience and making mistakes
(and you will make mistakes - sooner or later).

These days I use different kit as I have different needs so the key
message in this rant of a post is that what is right for you now may not
be right for you in future if you develop your skills and abilities
beyond beginner level, and ultimately into the technical realm.

IMHO you should get a single gas nitrox unit from the outset as they will
also handle air (which is 21% nitrox). You could do a lot worse than
buying a Suunto or an Uwatec computer. Both will meet your needs right
now.

I suggest that you stay away from the 'plastic fantastic', fashion
statement equipment manufacturers such as Mares. Also do not be seduced
by the lure of cylinder pressure radio transmitters that link to a wrist
mounted unit. This stuff is expensive, fallible, and by the manufacturers
own admissions, requires an SPG back up anyway.

If in doubt, apply the KISS principle.
Regards,
John

Signature

brandwoodj

BarryNL - 15 Sep 2005 08:36 GMT
> QUOTE=Brendan Kenneally]Hi anybody out
> there know a good cheap new dive computer that's easy to use?
[quoted text clipped - 4 lines]
> I suggest that you stay away from the 'plastic fantastic', fashion
> statement equipment manufacturers such as Mares.

Other than the fact you don't like the design, do you have any real
complaints about the Mares computer? I'd say the Mares M1 is a far
better design than many of the other computers. What do you dive when
your computer is in the shop having the batteries changed? Takes me 20
seconds to change the M1 batteries myself. Scratched up the plastic on
your computer yet? My M1 has a hardened glass screen - not a single mark
on it in 2 years of diving. Problems reading your computer in the dark?
With the M1 I just leave the backlight on permanently - after all, the
batteries are so easy to change who care how fast they run down.

Oh, and it's 70 euros cheaper than Suunto's entry level computer.

> Also do not be seduced
> by the lure of cylinder pressure radio transmitters that link to a wrist
[quoted text clipped - 4 lines]
> Regards,
> John

Signature

"If a man empties his purse into his head, no man can take it away from
him. An investment in Knowledge always pays the best Interest." -
Benjamin Franklin

Jerome Meekings - 15 Sep 2005 11:12 GMT
> > QUOTE=Brendan Kenneally]Hi anybody out
> > there know a good cheap new dive computer that's easy to use?
[quoted text clipped - 7 lines]
> Other than the fact you don't like the design, do you have any real
> complaints about the Mares computer?

I know one diver who has had 3 M 1s fail at about the 75 dive mark the
first 2 were replaced under the guarantee the 3rd trashed as he did not
want a 4th problem

YMMV
>replace spamblock with my family name to e-mail me
BarryNL - 15 Sep 2005 13:23 GMT
>>>QUOTE=Brendan Kenneally]Hi anybody out
>>>there know a good cheap new dive computer that's easy to use?
[quoted text clipped - 13 lines]
>
> YMMV

Well, I've currently done about 65 dives with mine. I'll post in another
couple of months how its holding up.

Signature

"If a man empties his purse into his head, no man can take it away from
him. An investment in Knowledge always pays the best Interest." -
Benjamin Franklin

Manic Grin - 15 Sep 2005 12:04 GMT
>Hi anybody out there know a good cheap new dive computer that's easy to use?
>I am a new diver and would appreciate any help.
>Thanks in advance
>Brendan

Apeks Quantum. Does air, nitrox and another richer nitrox mix for
accelerated deco (if you ever get that far). So everything up to
trimix level. If you can get to Dive 2005 at the NEC they were being
flogged for £149 last year.
Triple Jumper - 15 Sep 2005 16:29 GMT
Brendan: Forget all the show-offs.
You're a new diver, probably recreational, maybe still hiring some kit.
Go for a Uwatec Aladin - mine's easy to use, reliable and the battery has lasted years & years.

TJ

Brendan Kenneally wrote On 09/13/05 23:02,:
> Hi anybody out there know a good cheap new dive computer that's easy to use?
> I am a new diver and would appreciate any help.
> Thanks in advance
> Brendan
Jason - 15 Sep 2005 19:54 GMT
> Brendan: Forget all the show-offs.
> You're a new diver, probably recreational, maybe still hiring some kit. Go
> for a Uwatec Aladin - mine's easy to use, reliable and the battery has
> lasted years & years.

The battery will get to about 55% and stop working. Mine did. And then
it's expensive to send off. Can't imagine buying a computer with non
user-replaceable batteries these days.

Jason

Signature

See http://www.scuba-addict.co.uk/ for Caribbean trip reports
including Aruba, Cuba, Grand Bahama, Barbados, St Lucia and Mexico

 
Sign In
Join
My Latest Posts
My Monitored Threads
My Blog
My Photo Gallery
My Profile
My Homepage

Start New Thread
Enable EMail Alerts
Rate this Thread



©2008 Advenet LLC   Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.