Disturbing trend in diving?

[SouthernSharktoothDiver]

I will say this much. The idea of a diver going diving without a bottom timer or computer is not, inherently, a problem. For one example, a man I know who has been diving for almost forty years never uses either for his recreational diving. He remains above forty feet in depth, only dives aluminum 80's, and thus, according to the dive tables and his SAC rate, can never come anywhere close to hitting his NDL. Therefore, he has no use for either timers or computers unless he wishes to deviate from that pattern (which, from what he has told me, he only does when working with the local rescue squad, and then he carries a computer).

Similarly, if the bottom depth is say, 30-45 feet, as many reefs are, it would be rather difficult to hit your NDL even if you were actively trying to do so, on standard single tank dives. Even on deeper dives, this is not really an issue if the dive guide has a timer on him, knows the deepest you can go is say, 60 feet, and has everyone back on the boat in half an hour.

Obviously, the standard two dive package makes this a litttle more complicated, but still, it would be perfectly safe to use the instructors timer and tables, if he calibrates things based on a hard floor (the bottom) and keeps an eye on his watch. Not saying I recommend it, I don't generally do guided dives at all, but it's not necessarily unsafe.

 

[TMHeimer]

This happens all the time, how often during a briefing do you hear the question "Does anyone not have a computer" and the hands go up.

If it's a guided dive and the divers stay with the DM and abort the dive if they get separated they'll be just fine, you know the DM isn't going to be pushing the NDL limits. You might not dive that way, I've got 3 computers on me at all times and I'm self reliant, but the vast majority of divers don't make a career of it. They get certified and dive maybe 1 week a year so they aren't up to speed and they don't want to be.

They'll be just fine

The problem I see with them not having computers is that no doubt they don't have tables or know how to read them. That's scary. I did the vast majority of my charter boat diving (2006-2014 or so) with tables and dive watch only. But I review the tables often (and have a computer of course as well).

 

[LI-er]

Charters will often mitigate risk with inexperienced and poorly equipped divers by selecting an appropriate aka shallow and calm dive site.

 

[Eric Sedletzky]

I will say this much. The idea of a diver going diving without a bottom timer or computer is not, inherently, a problem. For one example, a man I know who has been diving for almost forty years never uses either for his recreational diving. He remains above forty feet in depth, only dives aluminum 80's, and thus, according to the dive tables and his SAC rate, can never come anywhere close to hitting his NDL. Therefore, he has no use for either timers or computers unless he wishes to deviate from that pattern (which, from what he has told me, he only does when working with the local rescue squad, and then he carries a computer).

Similarly, if the bottom depth is say, 30-45 feet, as many reefs are, it would be rather difficult to hit your NDL even if you were actively trying to do so, on standard single tank dives. Even on deeper dives, this is not really an issue if the dive guide has a timer on him, knows the deepest you can go is say, 60 feet, and has everyone back on the boat in half an hour.

Obviously, the standard two dive package makes this a litttle more complicated, but still, it would be perfectly safe to use the instructors timer and tables, if he calibrates things based on a hard floor (the bottom) and keeps an eye on his watch. Not saying I recommend it, I don't generally do guided dives at all, but it's not necessarily unsafe.

That's fine if it's shallow enough and there is no risk of running anywhere close to NDL.
But then you say "Even on deeper dives this is not really an issue if the dive guide has a timer on him".
If the dive guide has to have a timer (or computer) then why wouldn't you have one? Is this just laziness or are people just that cheap?
I do a lot if dives for two hours but the depth is only 10' to 15' or 20'. For those dives I only have an SPG and a compass. a computer isn't necessary because it is physically impossible to run out of NDL that shallow, and besides why risk damaging a computer or losing it while doing work dives? At most I would have a watch or timing device but that would only be so I would know what time it is and or know how long I've been in the water. More just for curiosity, that's all.
But if it involved any depth that I could potentially run out of NDL, you bet your sweet arse I'd have a computer or bottom timer!

 

[LI-er]

why risk damaging a computer or losing it while doing work dives? At most I would have a watch or timing device but that would only be so I would know what time it is and or know how long I've been in the water.

Why? Because if carried and stowed properly the odds of damage to a computer are so remote as to be beyond consideration, and if you don't have the computer but need to know your bottom time or the time of day you'll need to go purchase yet another piece of gear that you otherwise wouldn't need.

Plus if you log your dives, it's good to carry a computer which can upload the data to a dive log software program.

 

[SouthernSharktoothDiver]

@Eric Sedletzky To be honest, I don't know why someone wouldn't carry at least a timer. The one such dive I did, I used my timex Ironman to keep time. But, the point remains that there wouldn't be anything particularly dangerous about it.

 

[Jafo19D]

This past weekend I dove with a DC I’ve dived with several times before. The booking process is all online and in that process they ask what certs you have and I believe last dive. So I was pretty surprised when I asked one of the DMs which group is divers had the most experience and he responded that he didn’t know.

It seems that if these dive centers made divers set up their own gear and watch them do so that they would at least get an idea if someone was inexperienced. It’s doesn’t come close to being an in depth evaluation but it does say if the diver can perform the most basic task.