Riding a DSMB up from a deep wreck???

[dave22387]

I wholeheartedly agree that a balanced rig if achievable is the absolute gold standard and should be used. That being said there are some dives where it just isn't really feasible. Deep wreck dive in a wetsuit with a hot drop and drift deco for example. One where you can't stage bottles because you'll be leaving the wreck from somewhere other than where you started and not coming up the anchor. Not terribly common but happens enough where it needs to be considered. On a 200 fsw dive in a wetsuit with deco bottles where you can't stage it's damn near impossible to be able to swim that rig up and some alternate method is necessary. You can say drysuit etc. But again if youre doing a long hang at 20 and 10 here where the temp at that depth is in the high 80s a drysuit isn't really good either. Again not really trying to debate the need for redundant bladders etc... This post is about the technique in the video. The two handed OOG diver keeps getting brought up which is valid. How is that situation different during the ascent with the bag vs once the bag is released and you're holding the spool/reel? Seems you're still in a similiar predicament in both situations.

 

[dave22387]

Teaching TDI class, he many not have a choice. It's part of the required drills for TDI decompression procedures class. Even if you do have a dual bladder wing, you still have to complete bag ascent for the class. At least that's what my instructor said. I was told that essentially means ascend with a bag.

That's true it is a requirement. I did have to do a bag ascent during my TDI AN/Deco courses.

I read that standard as ascending on something other than a fixed line, but I'm not a tdi instructor.

The other thing is one of the other members stated that he teaches this still by dumping the BC into the bag. To me that says it's an ascent skill and not a failed bc skill but idk

 

[EireDiver606]

That being said there are some dives where it just isn't really feasible.

Where?

If you have the expense to dive, especially technical, you ought to buy a Drysuit. No ifs, ands, or buts...

If you’re diving 60m with multiple stages in a wetsuit, whether you have a dual bladder wing, or not, you need a Drysuit even in 80s. I’m saving up for Santi E.Motion +....

 

[dave22387]

@EireDiver606

You can say drysuit etc. But again if youre doing a long hang at 20 and 10 here where the temp at that depth is in the high 80s a drysuit isn't really good either.

 

[dave22387]

I can barely stand the temps in a 3mm sometimes and need to open a zipper. I dove my drysuit down here once and almost died from the heat

 

[EireDiver606]

I can barely stand the temps in a 3mm sometimes and need to open a zipper. I dove my drysuit down here once and almost died from the heat

Even in 25 degree+ water, your body will reduce its core temperature especially at depth where it’s generally colder. If you’re in the water for multiple hours...

 

[dave22387]

It's still quite warm on the bottom here. I get what you're saying but 95 percent of deeper dives here are done we because of the temps. I'm generally doing no more than an hour ish of deco but I assure you I'm just fine with the temps as are almost everyone else here. Go a couple degrees north latitude and I agree with you

 

[PfcAJ]

Is it possible to achieve a balanced rig on deeper dives, like Tech 2 and beyond? Dives where double AL80 just won't cut it and you have 2-3 extra bottles?

On t2 dives the bottom gas is very light. An al80 with 15/55 is damn near neutral. An al40 with 2000ish PSI of oxygen is also neutral. Really the heaviest bottle is the 50%.

That said, I think a drysuit is a smart move even when its warm out on t2 dives. I've ran into some quite chilly thermoclines off south Florida (like upper 50s Brrr!).

 

[PfcAJ]

Inspect gear. When that fails. Oral inflate second bladder. Kick hard.

I think youre mistaken if you think you can orally inflate that thing fast enough while you're sinking and your ears are screaming.

 

[northernone]

Where?

If you have the expense to dive, especially technical, you ought to buy a Drysuit. No ifs, ands, or buts...

If you’re diving 60m with multiple stages in a wetsuit, whether you have a dual bladder wing, or not, you need a Drysuit even in 80s. I’m saving up for Santi E.Motion +....

As someone who knows and detests drysuits this opinion suprises me.

They make unreliable BCDs, are unreliable when it comes to thermal properties. Unless you plan every dive around counting on a flooded drysuit you have no contingency.

You can't catastrophically fail a wetsuit. They are an excellent tool for insulation with predictable risk factors.

I'll take a wetsuit for 60° water over a drysuit even when I have access to 3 drysuits.

Come to where the water is actually cold.

Using a lift bag as an emergency BCD isn't a bad thing either. They have less failure points than a drysuit and are designed for the purpose. In the case of a runaway buoyancy compensator the last place I want to be is sewn inside of it.

Cameron