cornfed
Mindless lemming
yoda4x4:
If your deep class is anything like mine was you could probably skip it.
Dive planning consisted of, "See that part of the quarry? It's deeper over there... that's where we're going!"
Doubling Up Tanks
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If your deep class is anything like mine was you could probably skip it.
Dive planning consisted of, "See that part of the quarry? It's deeper over there... that's where we're going!"
matt_unique
Guest
A viable option for taking the next step, including deco diving, is with single steel 120's. To start out with an example, following the rule of thirds, you can do a deco dive to 160 feet for 25 minutes with a single steel 120 and a 40CF deco bottle. This of course depends on your SAC (breathing volume rates) and many other factors.
I completed the TDI Deco Procedures course based on the single 120 configuration. This is one of the reasons I went with TDI over other agencies who require doubles for tech/deco training. This configuration suits my needs in terms of depth/deco desires at this point. I also did not have to invest $7000 in new gear to move into tech diving. Through this course you learn how to configure your gear including the use of H-valves.
The single option is not as popular but viable and advantageous depending upon your needs. I believe your air supply should reflect your *actual* needs factoring in emergencies. Many move to doubles who don't use 100CF of air in their dive profiles. Doubles are certainly necessary when you need more air.
--Matt
I completed the TDI Deco Procedures course based on the single 120 configuration. This is one of the reasons I went with TDI over other agencies who require doubles for tech/deco training. This configuration suits my needs in terms of depth/deco desires at this point. I also did not have to invest $7000 in new gear to move into tech diving. Through this course you learn how to configure your gear including the use of H-valves.
The single option is not as popular but viable and advantageous depending upon your needs. I believe your air supply should reflect your *actual* needs factoring in emergencies. Many move to doubles who don't use 100CF of air in their dive profiles. Doubles are certainly necessary when you need more air.
--Matt
Cornfed,
Point well taken. I'll discuss what's involved with taking this class and what's accomplished with my LDS. They are a bunch of very open divers and would definitely point me in the right direction. I'm not in the not a card collector for sake of having everything. Each one has to have a specific use to me.
David
Point well taken. I'll discuss what's involved with taking this class and what's accomplished with my LDS. They are a bunch of very open divers and would definitely point me in the right direction. I'm not in the not a card collector for sake of having everything. Each one has to have a specific use to me.
David
cornfed
Mindless lemming
Do you have any previoius experience with the shop or instructor? I took my deep class right after I moved to the area. I talked to the instructor at length before class but I might as well have been talking to someone at 7-11 because class wasn't anything like we talked about. Even when you're trying to pick a good instructor it doesn't always work. *shrug*yoda4x4:
wow...I think I'll adopt that into my briefings....I have a similar line....cornfed:
""See that part of the quarry? It's deeper over there... STAY the HELL Away from there...you can easily reach 80' over here."
A single steel HP120 is freaking huge; I can typically get TWO NSL dives out of it.
However, that second one leaves me with scant reserve.
If you're going to be doing decompression diving in the future, learning to dive doubles NOW won't hurt you and WILL take some of the load off when you "move up" to deco diving. Doubles dive very differently in terms of trim than even big singles, and "feel" different underwater. Of course they're heavier than Hades above water also.
The skill addition really is a matter of being able to do the valve drills - but, if you're not squared away trim and buoyancy-wise with doubles when you take the deco procedures class, you're going to be way, way busier than you'd like with stuff that you should have had nailed beforehand.
I'm all for diving the doubles if you intend to move towards decompression diving, simply because you'll need them there for safety reasons and having your diving squared away with them up front will help you.
However, that second one leaves me with scant reserve.
If you're going to be doing decompression diving in the future, learning to dive doubles NOW won't hurt you and WILL take some of the load off when you "move up" to deco diving. Doubles dive very differently in terms of trim than even big singles, and "feel" different underwater. Of course they're heavier than Hades above water also.
The skill addition really is a matter of being able to do the valve drills - but, if you're not squared away trim and buoyancy-wise with doubles when you take the deco procedures class, you're going to be way, way busier than you'd like with stuff that you should have had nailed beforehand.
I'm all for diving the doubles if you intend to move towards decompression diving, simply because you'll need them there for safety reasons and having your diving squared away with them up front will help you.
FIXXERVI6
Contributor
I'm in the same boat, I don't do decompression dives yet or overhead yet, but I just built a set of double aluminum 80's, havn't dove them yet.
the reason I went for doubles is because
1. I want to eventually get into wreck, cave, deco, etc
2. that extra air at +100 feet is nice to have
3. redundancy, it came down to doubles or pony for me, doubles won
4. I'm a good sized fairly strong guy, double aluminum 80's won't be hard to carry around for me.
5. I plan on doing wreck training fairly soon, my double 80's will work fine for some wreck, some cave, and all regular ow ndl diving.
6. Not one person can give me a really good valid reason NOT to do double aluminum 80's pertaining to my person and the type of diving I do.
The only thing I see crazy about doubles is the cost, I also considered doing a single LP104 with an H valve or similar rig, double aluminum 80's in my eyes won over that.
I can't give you any advise on doubles divingsince I havn't done that yet, but on my quest for doubles I have ran into people that have two attitudes
"thats stupid, your waisting yoru time and money and have no buisness doing that"
and
"go for it, keep X Y and Z in mind tho"
the reason I went for doubles is because
1. I want to eventually get into wreck, cave, deco, etc
2. that extra air at +100 feet is nice to have
3. redundancy, it came down to doubles or pony for me, doubles won
4. I'm a good sized fairly strong guy, double aluminum 80's won't be hard to carry around for me.
5. I plan on doing wreck training fairly soon, my double 80's will work fine for some wreck, some cave, and all regular ow ndl diving.
6. Not one person can give me a really good valid reason NOT to do double aluminum 80's pertaining to my person and the type of diving I do.
The only thing I see crazy about doubles is the cost, I also considered doing a single LP104 with an H valve or similar rig, double aluminum 80's in my eyes won over that.
I can't give you any advise on doubles divingsince I havn't done that yet, but on my quest for doubles I have ran into people that have two attitudes
"thats stupid, your waisting yoru time and money and have no buisness doing that"
and
"go for it, keep X Y and Z in mind tho"
In the 100-130' range having redundancy is a very good thing. Deco or no deco.
While I recognize that lots of people consider their buddy to be their backup, you're betting your life on it. If its on your back you KNOW its there. If its your buddy, and he's not, better hope that Murphy doesn't choose that particular instant to visit you.
While I recognize that lots of people consider their buddy to be their backup, you're betting your life on it. If its on your back you KNOW its there. If its your buddy, and he's not, better hope that Murphy doesn't choose that particular instant to visit you.
cornfed
Mindless lemming
In the end that's what's really important. One of the really nice things about boards like this is you can check your opinions of of others. For example you might think your instructor is good but not really know because you don't have anything to compare with. After reading the accounts of others you can confirm this. Hope everything works out for you.yoda4x4:
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