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Dive computer manual stating multiple dives per day for more than a week unsafe?
- Thread starter Dave_lucas
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there's conservative diving - and then there's lawyers.
Speaking as someone who used to do three dives per day, every day, for as many as 21 days straight and has never had DCS - I know that serious repetitive diving is possible, although given my line of work, we made them all as conservative as possible and took days off when we thought we were getting close to our limits - but as has been pointed out above - it's possible to get bent from a single dive on a single day, even if you obey every limit that has ever been written, ever. A lot of our customers would be on two-week holidays and dive three times a day every day for 12 days and also never get bent - but every now and then it happened.
I think the warning in the manual is a liability disclaimer based on the lowest common denominator in a very small spread of factually accurate incidents. The same might be true of other activities - as in - if you drink 2 beers per day your liver might explode so take a break every now and then and take a longer break if you drink 4 beers in a day. I think it's more important to look at what your computer is actually telling you and to abide by those limits, and also have a realistic look at what you are doing based on what you were (hopefully) taught during training. It is always better to err on the side of caution than push yourself too far and also learn to look at the physiological results of what you are doing - how tired are you after the end of the diving day; how do you physically feel and maybe if you're tired and aching a bit then it's better to take a day off and recuperate. It's different for everyone.
I strongly encourage all divers to learn more about basic decompression theory in terms of both physics and physiology - a lot of it is right there in the Open Water manuals of every agency, but it's important to learn how that relates to you as a person as much as it relates to you as a diver. A computer gives you guidance based on a microchip that is programmed to compute advanced mathematical theory based on depth and time and repetition, but only you as a human being can decide what your limitations might be. If you are a novice to driving a car then it's best to stick with all the prescribed limitations - with a bit more experience then maybe you can take that car to a race track and have fun with it - but there's a lot to learn in between the two.
Hope that helps
C.
Speaking as someone who used to do three dives per day, every day, for as many as 21 days straight and has never had DCS - I know that serious repetitive diving is possible, although given my line of work, we made them all as conservative as possible and took days off when we thought we were getting close to our limits - but as has been pointed out above - it's possible to get bent from a single dive on a single day, even if you obey every limit that has ever been written, ever. A lot of our customers would be on two-week holidays and dive three times a day every day for 12 days and also never get bent - but every now and then it happened.
I think the warning in the manual is a liability disclaimer based on the lowest common denominator in a very small spread of factually accurate incidents. The same might be true of other activities - as in - if you drink 2 beers per day your liver might explode so take a break every now and then and take a longer break if you drink 4 beers in a day. I think it's more important to look at what your computer is actually telling you and to abide by those limits, and also have a realistic look at what you are doing based on what you were (hopefully) taught during training. It is always better to err on the side of caution than push yourself too far and also learn to look at the physiological results of what you are doing - how tired are you after the end of the diving day; how do you physically feel and maybe if you're tired and aching a bit then it's better to take a day off and recuperate. It's different for everyone.
I strongly encourage all divers to learn more about basic decompression theory in terms of both physics and physiology - a lot of it is right there in the Open Water manuals of every agency, but it's important to learn how that relates to you as a person as much as it relates to you as a diver. A computer gives you guidance based on a microchip that is programmed to compute advanced mathematical theory based on depth and time and repetition, but only you as a human being can decide what your limitations might be. If you are a novice to driving a car then it's best to stick with all the prescribed limitations - with a bit more experience then maybe you can take that car to a race track and have fun with it - but there's a lot to learn in between the two.
Hope that helps
C.
Texasguy
Contributor
Probably you won't get decompression sickness but if you do it long enough, the tiny bubbles will make you a retard. 
j/k
j/k
Certainly the company is being overly cautious at the request of their lawyers.
Each individual is different so what works for others (so far) may not be correct for you. However, I think of the teaching dive professionals who do multiple dives a day for days on end without any noticeable ill effects. I've done 60 dives in just over two weeks (four per day with some up to 2 1/2 hours long in the Philippines). I've done multiple deep dives to depths of 200 fsw. So far with no apparent impact ^(&)(*&$^&$**_)()*^#&^*()_
Each individual is different so what works for others (so far) may not be correct for you. However, I think of the teaching dive professionals who do multiple dives a day for days on end without any noticeable ill effects. I've done 60 dives in just over two weeks (four per day with some up to 2 1/2 hours long in the Philippines). I've done multiple deep dives to depths of 200 fsw. So far with no apparent impact ^(&)(*&$^&$**_)()*^#&^*()_
"legal-eeze"
I read one manual warning once that stated it should not be relied on for diving safety...
I read one manual warning once that stated it should not be relied on for diving safety...
Asteve
Contributor
If he is looking to do a lot of dives in a day the Cressi Leonardo may not be the best computer for him, the Cressi Leonardo is also looking for SI of 3 hours. With only 1 hour SI , He will get less then 70% of other dive computer bottom time. Do a search on Cressi Leonardo on this board you will find some useful information.
OP
Dave_lucas
Registered
Understood each person and situation will be different we all plan to dive well within the limits of our computers / tables and each persons tolerance.
Re the Cressi Leonardo I read the threads a few weeks ago and it was an interesting read. With that said I went ahead and purchased one and figured that I can always use it as a backup for $179 or sell it.
in the meantime I will be running the same as my buddy if nothing else we are both off on Fridays so it is nice to have someone to go with while everyone is at work and the lakes have not been stirred up yet with the weekend traffic.
going to go try it out here in a few min
Re the Cressi Leonardo I read the threads a few weeks ago and it was an interesting read. With that said I went ahead and purchased one and figured that I can always use it as a backup for $179 or sell it.
in the meantime I will be running the same as my buddy if nothing else we are both off on Fridays so it is nice to have someone to go with while everyone is at work and the lakes have not been stirred up yet with the weekend traffic.
going to go try it out here in a few min
I wrote this at least once already: we normally go for a week and do 3-4 tanks/day typically staying above 80'. The only times I see my leonardo show < 99 minutes NDL is when I go below 80' on the last day.
Leonardo will not give you a SI, it'll just factor in the one you had once you hit the water. This is where I look at the tables when planning the day -- though mostly we just do an hour for regular SI and about 3 for lunch: that works out fine for our typical dives.
---------- Post added July 17th, 2015 at 04:27 PM ----------
Meh. He'll see 99 minutes (that's the display limit, not the no deco limit) on the leonardo, the "other computer" will show 142 minutes, they'll be OOA in 70. Big deal.
dumpsterDiver
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Yeah listen to a bunch of strangers on the internet and ignore your computer and the instruction manual. What's the worst that could happen? 
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