Dive Timer with Multiple Alarms

[iainmsmith]

Originally Posted by alunharford

My problem is in whether this increases or decreases that risk. There's always going to be a risk, whatever you do.

Alun,

The word you are missing is "significantly", which should be inserted before "increases or decreases". Did you leave the house this morning? If so, you increased the risk of getting hit by a truck. So what? That's not a significant increase in risk. If you stayed at home, a truck might still plough into the house. Did staying at home significantly decrease you risk?

Originally Posted by alunharford

I thought there was some debate on whether you should duplicate a mask, but I'm probably wrong.

Erm...yes. You are.

Originally Posted by alunharford

Even so, if you've lost your other one you are reasonably likely (5% of the time maybe) to drop the spare because you can't see what you're doing.

When was the last time you did a mask switch underwater? When was the last time you _carried_ a spare mask underwater? How often do you drop your mask when doing a remove and replace?

Originally Posted by alunharford

I'm pretty sure I could judge distance well enough. I have at least a reasonable idea of how big a metre is and could get it right +/- 10cm. Doing the deco below your first gas switch could be a problem, but providing it's not a huge length of time I would have thought you could get it *about* right (right enough to come up bent instead of dead).

Alun, you are so far out of your league here that it's not funny. I respectfully suggest that you're not capable of holding a stop to +/- 10cm in ideal conditions (very, very few people are, whatever they might think), so the idea of judging your stop depth to that accuracy while "blind" is laughable. Doing any sort of accelerated deco means that you're probably looking at at least 10 minutes of stops (otherwise it's probably not worthwhile). Have fun counting that in your head, while holding a depth that you can't see.

Originally Posted by alunharford

Oh come on, even I probably send up a blob without being able to see it probably 75% of the time (never tried it mind, so it might be more difficult than I think). You might get caught on it, in which case you're almost certainly dead, but assuming that doesn't happen you've got at least two tries.

You've rigged a DSMB onto a spool/reel without seeing it? Did you drop the boltsnap? (Many of us carry the spool and DSMB seperately and don't deploy until 21m anyway, thus we're doing everything midwater while holding a stop. How often have you done that?)

Originally Posted by alunharford

Anyway, my point is that it COULD help (no matter how remote the chances), and that I can't think of a drawback (other than perhaps using some battery life on your computer, but I think it's fair to say that's even less of a problem.

If you end up solo and maskless, you _may_ be able to get some idea of the numbers on your computer/dive timer, if you're lucky, by creating a bubble in front of one eye. It's bloody difficult. You're not going to manage a smooth ascent and I see that others have commented on the confusion resulting from the inevitable multiple beeps.

If you want to talk about advanced recreational/technical diving, catch JK or myself in the pub at some point and we can have a proper face-to-face discussion. If/when you get round to doing your Advanced Nitrox course, we can throw some failure scenarios at you if you like (not formally part of the course, but for educational purposes)

Iain

[iainmsmith]

[johnkendall]

Originally Posted by alunharford

Oh come on, even I probably send up a blob without being able to see it probably 75% of the time (never tried it mind, so it might be more difficult than I think). You might get caught on it, in which case you're almost certainly dead, but assuming that doesn't happen you've got at least two tries.

I'm sorry Alun, I'd tried to stay out of this one, but having returned from my Dive trip to read this rubbish has prompted me into action.

I'm not convinced that you can send up a blob properly 75% of the time when you can see. You certainly didn't have the bouyancy control last time I saw you in the water to hold a stop to within 0.5m even with sight and a blob. Maybe you should think about actually finishing Sports Diver before you start trying to post about subjects that you have so little idea about that it is funny.

The internet is a funny place, you can make up all kinds of personas for yourself, but you get bitten when people know the real you.

Grow up.

John

(For those of you who don't know, I'm the DO of Alun's club)

[Andy Phillips]

Originally Posted by johnkendall

I'm sorry Alun, I'd tried to stay out of this one, but having returned from my Dive trip to read this rubbish has prompted me into action.

I'm not convinced that you can send up a blob properly 75% of the time when you can see. You certainly didn't have the bouyancy control last time I saw you in the water to hold a stop to within 0.5m even with sight and a blob. Maybe you should think about actually finishing Sports Diver before you start trying to post about subjects that you have so little idea about that it is funny.

The internet is a funny place, you can make up all kinds of personas for yourself, but you get bitten when people know the real you.

Grow up.

John

(For those of you who don't know, I'm the DO of Alun's club)

Trust me, it didn't take long to work this out without knowing the chap.


Andrew

[Mark Chase]

Originally Posted by johnkendall

I'm sorry Alun, I'd tried to stay out of this one, but having returned from my Dive trip to read this rubbish has prompted me into action.

I'm not convinced that you can send up a blob properly 75% of the time when you can see. You certainly didn't have the bouyancy control last time I saw you in the water to hold a stop to within 0.5m even with sight and a blob. Maybe you should think about actually finishing Sports Diver before you start trying to post about subjects that you have so little idea about that it is funny.

The internet is a funny place, you can make up all kinds of personas for yourself, but you get bitten when people know the real you.

Grow up.

John

(For those of you who don't know, I'm the DO of Alun's club)

Ouch

I bet that hurt. Alun's obviously keen if a bit over zealous so it is not good to shoot him down in flames so publicly even if you are right. A quiet word would have perhaps been a better judged response from the club DO IMHO.

I don’t think any one was in any doubt as to his experience he posted it earlier on and its obvious from his comments. Perhaps Alun's enthusiasm to get in amongst it is better channelled rather than slapping him around the face with it. There are plenty of people on the net who will do that without his own club officers having a public pop.

Sorry I think thats bad form


Mark Chase

[Adrian Kelland]

Originally Posted by johnkendall

I'm sorry Alun, I'd tried to stay out of this one, but having returned from my Dive trip to read this rubbish has prompted me into action.

I'm not convinced that you can send up a blob properly 75% of the time when you can see. You certainly didn't have the bouyancy control last time I saw you in the water to hold a stop to within 0.5m even with sight and a blob. Maybe you should think about actually finishing Sports Diver before you start trying to post about subjects that you have so little idea about that it is funny.

The internet is a funny place, you can make up all kinds of personas for yourself, but you get bitten when people know the real you.

Grow up.

John

(For those of you who don't know, I'm the DO of Alun's club)

I know others have already said it, but I think that's a little unfair to say to Alun in public.

How hard could it be for Alun to come back to you to continue his training. Not all members are this keen, this is the future of you club too.

Adrian

[John Touhig]

A couple of things....

First, I should have thought before starting this thread Gas Swicthes are made using depth and not time. A point I realised about 10 sec. after my post.

Second, I have been a reader of this forum for a couple of years (didn't know enough to post anything of value, just read and learn) and I was pleased to see how different it was from the "Other Place" were you get flamed for spelling mistakes (being Dyslexsick thats a real pain).... (and yes I am, no joke).

Are we sliding down the Shot to the "Other Place"...???

[daz]

Originally Posted by GasMuncher2

A couple of things....

First, I should have thought before starting this thread Gas Swicthes are made using depth and not time. A point I realised about 10 sec. after my post.

Second, I have been a reader of this forum for a couple of years (didn't know enough to post anything of value, just read and learn) and I was pleased to see how different it was from the "Other Place" were you get flamed for spelling mistakes (being Dyslexsick thats a real pain).... (and yes I am, no joke).

Are we sliding down the Shot to the "Other Place"...???

I don't think so too be honest. There was a post that were a bit tactless and belittling in my opinion but others have said what I was thinking so no point in adding to it.

Regarding posting anything of value, It's an interesting comment but one that quite a few people have made. They do not feel that they have anything of value to add and just lurk away reading and learning (Which is fine) but some of the most interesting discussions have come from people asking questions that they may consider as trivial or stupid and in fact provide a lot of good discussion and knowledge to others in similar circumstances and even some of the more experienced people on the site.

Nice to see you finally come out of the closet as it were and don't worry about the spelling, I've learn't to translate Chasey's and if he writes anything I don't agree with I just pretend he mean't to write something else

Daz

[wreckweasel]

Originally Posted by Mark Chase

Tables are OK but the anti computer arguments predate the latest units like the Abyss and the VR3. Its 2004 boys and girls computers are here to stay. Tables a quaint and are very useful for people who want to use their bodies as Ginny pigs for pushing the limits or developing new types of deco but if you just want to get the job done safely computers in competent hands work well.

Just to play the devils "disgusting xmas yellow drink"......

Some of us who dive tables arent doing it for experimental deco. I dive tables because they're reliable, safe and build in a bit of extra safety margin.

Everyone makes their own choices, but for me, savings of deco that are anything less than 20 mins arent significant. Mind you, sometimes I have cause to reflect on that stance, especially in february


/Z

PS. whats all this lunacy about beepers to remind you to switch depth, what is this, the fisher price guide to deco?

[And]

Originally Posted by zaksherlock

PS. whats all this lunacy about beepers to remind you to switch depth, what is this, the fisher price guide to deco?

Its for deep air divers, who have a hard time remembering anything

Andy