BP/W for me and my son?

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Disclaimer: I have been diving for less than a year and have less than 50 dives. Take any statements I make for their own intrinsic value (if any), not because of any presumed "expertise". I have only owned one BCD - a DSS stainless steel back plate and LCD 30 wing - so that is the only BC I have actual hands-on diving experience with other than the jacket BCs I used in OW training last year.

the dgx bp/w is also another option if the lift isn't too small

https://www.divegearexpress.com/dgx-custom-singles-harness-backplate-wing-package

Dive Gear Express is awesome on customer service. And their house brand wing (i.e. what runsongas linked here) is identical to the Dive Rite Travel EXP wing (i.e. as I understand it, a known qood quality wing). Further DGX's warranty is, essentially, lifetime on this setup. I believe (call them and confirm) that their warranty on this setup is even such that you could buy it, dive it for 6 months, decide it just isn't right for you, and return it for a full refund in store credit. If you return it within their "normal" return period (14 days? 30 days? I don't remember), you can get a full refund, period.

Tobin will verbally slay you. Yes he is a wealth of information and is a great resource however my experience is that he does not suffer fools lightly not that you are a fool but you are not informed and Tobin will tell you what to buy and if you question it you may not appreciate the reaction that you will receive (check sb for threads on that ).

To say the least.... And that's if you even get to completely ask your question. Most of mine were cutoff halfway through with an assumption about what I was trying to ask and then I was given an answer to a question that I was not even trying to ask.

I don't believe I have heard or seen anything where someone said he led them down the wrong path.

Am I incorrect in understanding that Tobin's recommendation for the wing lift capacity a person needs is dependent on the presumption that the diver will drop their weights if they have an emergency just when they arrive at max depth at the start of a dive? In the posts I have seen, he doesn't even point that out and acknowledge that, if you don't want to lose your weight belt and weights in that situation, you should buy a wing with enough additional capacity to match the weight you're carrying. Maybe my limited experience extends to not seeing a fuller explanation posted. Personally, I was shocked at how much weights cost and I would much rather have a slightly bigger wing than dive with a plan that involves taking my weight belt off and dropping it in the middle of, say, an uncontrolled descent because my dry suit neck seal was installed incorrectly and it just popped off.

In contrast, I think I've seen posts from you, tbone, that specifically talk about never ditching your weights at depth - only if you need to drop them at the surface in order to stay afloat. So, it seems like you would agree that a wing needs enough lift to get you up from the deepest part of your dive without requiring you to ditch weights. No?

I guess color me still a little unclear on how a person should really determine exactly how much wing capacity they need. And, if I need to add it, that is with the caveat that, at least for me, I would like my wing capacity to reflect my wallet's desire to not have to drop a weight belt with weights that cost $5/pound.

---------- Post added August 27th, 2015 at 02:49 PM ----------

Do you really want to travel with a piece of metal to Belize?

I flew to Mexico and to Hawaii with my stainless steel backplate (and harness, wing, wetsuit, regulators, computer, and mask) in my carry-on bag. Fins and some other things in my checked bag. I think it's a great way to fly'n'dive. It may depend on the airline, but I've never flown anywhere for anything where anyone weighed my carry-on. They only seem to care that the size allows it to fit in the overhead bin.

---------- Post added August 27th, 2015 at 02:52 PM ----------

Granted a steel plate and STA together may be heavier, but the jacket's still bulkier.

I think the Trianta from DRiS might require an STA, but I think the DGX BP/W does not. My current setup does not require an STA and I think I would only buy a BP and/or W that would allow me to use them without an STA. If you DO want to use an STA, you can do so on any BP/W, so there's no downside to having a BP and W that don't require an ST, right?

---------- Post added August 27th, 2015 at 03:11 PM ----------

The highland bands give you a very solid lock on the tank and yet it is easy to remove for tank changes

I bought some of the Highland QR tank straps about 5 or 6 weeks ago, I think. It turned out that they were not at all easy (for me, anyway) to remove for tank changes. If I adjusted them to be satisfactorily tight, then when I flipped the buckle open there was not enough slack in the strap to unhook the one side of the strap from the other. I always had to loosen the strap to be able to unhook the hook from the buckle. And if I adjusted them when they were wet, the next time I went to use them and they were dry, there was no way at all to hook the buckle side over the hook without first, loosening the strap then tightening it back up. Overall, they were slower for me than regular cam bands.

Thank goodness I bought them from Dive Gear Express. I had no thought of returning them. But, I got an email soliciting a review of my recent purchase. I wrote one and gave them, I think, 3 stars because they are well constructed. They just didn't give me what I wanted. Customer Service at DGX read my review and contacted me. They updated the product description based on my review and they gave me a full refund on the straps and THEN they told me to go ahead and keep them. I have since given them away to another SB member. I even paid the postage out of my own pocket to mail them to him.

I ordered the DGX brand QR tank straps ($40, for a pair, so less expensive than the Highland straps, too).

https://www.divegearexpress.com/tank-strap-quick-release-with-s-s-hinge-buckle

THESE are what I wanted all along. I went through an initial process to get them adjusted right and now I don't have to touch the adjustment at all when putting them on and off. And, another thing I like better than the Highland ones, the tail of the strap - i.e. the extra part of the strap, the part that goes through the D-ring that the buckle hooks onto, that lets you adjust the length - velcros to the inside, instead of the outside. So, once the strap is fastened around a tank, it is impossible for the end of the strap to dangle and pull your buckle open. The Highland straps had the strap tail velcroed on the outside, so it could, potentially, be loose, just like the tail on a normal cam band. Since I have trim weight pockets on one of my tank straps, they prevented the tail on one of my old cam bands from laying down and securing all the way, so that was always a little bit of a worry for me. No problem now! The tail does overlap one of the weight pockets a little bit, but it's in between the weight pocket and tank, so it's not a concern when in use.
 
579d6bea533433c4eba46f5348a55686.jpg


My son is 9yrs old.....this is his BCD.


Sent from my iPhone using Tapatalk
 
579d6bea533433c4eba46f5348a55686.jpg


My son is 9yrs old.....this is his BCD.


Sent from my iPhone using Tapatalk

Way too few "D" rings, add-ons and pockets. How do you expect a $cubaPro dealer to cope ??:cool2:
 
Am I incorrect in understanding that Tobin's recommendation for the wing lift capacity a person needs is dependent on the presumption that the diver will drop their weights if they have an emergency just when they arrive at max depth at the start of a dive?



My lift recommendation have never been based on dropping any ballast. Maybe after you have the benefit of some technical dive training you will start to appreciate the aversion most technical divers have to dropping ballast.

One more time.

Any wing needs to be able to do two things:

1) Float your rig at the surface with full back gas tanks

2) Be able to compensate for the maximum possible change in buoyancy of the divers exposure suit.

Please describe for me the circumstances under which a properly weighted diver would need to drop ballast if they follow these criteria.


Diver's using doubles need to start the dive negative by at least the weight of their back gas.

Single tank divers, depending on the buoyancy of their suits, may not need to.

Tobin
 
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Just a word of caution, DGX or DiveRite Travel wing is a lousy wing for STAless usage. There is no build-in tank stabilizer. Center opening is too wide. IMO, the best STAless setup is DSS. You can take the wing off without remove tank bands. It make traveling very convinent. Wing has nice build instablizer. The 2nd best wing for STA less setup IMO is Oxycheq MkV. Very narrow center opening, nice build in tank stabilizer.

If OP don't mind STA vs STAless, also don't mind the flatness of the backplate, between DRIS Trianta package $379 vs DSS $450, the difference is only $70. I will recommend DSS. While they both function the same in practice, DSS is an overall better thought out package. You add weight plate later one if you need the ballast. DRIS triata package is nice, but the wing isn't constructed to the same quality as DSS wing, both the external shell and internal bladder. The HOG backplate also doesn't have the fit and finish quality of DSS. If budget is tight, I think Trianta package is very nice. You will be happy with it also.

I would say to OP, before you make your decision, give Tobin a call and see what he has to say. You will learn a lot regardless. He is usually, if not always right when it comes to BP/W although you may not agree at this point. As you gain experience, your setup will converge with his suggestion
 
I'm in the call Tobin camp as well. DSS gear is top shelf. He may make a few suggestions, but they are all to make sure you get the proper gear for the type of diving you do
 
My lift recommendation have never been based on dropping any ballast. Maybe after you have the benefit of some technical dive training you will start to appreciate the aversion most technical divers have to dropping ballast.

One more time.

Any wing needs to be able to do two things:

1) Float your rig at the surface with full back gas tanks

2) Be able to compensate for the maximum possible change in buoyancy of the divers exposure suit.

Please describe for me the circumstances under which a properly weighted diver would need to drop ballast if they follow these criteria.


Diver's using doubles need to start the dive negative by at least the weight of their back gas.

Single tank divers, depending on the buoyancy of their suits, may not need to.

Tobin


I know it's not your thing, but if you HAD fully read and understood my earlier post, you would have grasped that my point was that I do NOT favor a plan than involves dropping ballast. Also, I have had some technical dive training. My training is not complete, but then, I don't expect that I will ever feel my training is complete.

Thus, I cannot provide you an example of why a properly weighted diver, with a properly sized wing, would ever need to drop ballast.

However, I think this is your own example for wing sizing:

The Deco Stop

(that is you on TheDecoStop, isn't it?)

In your first example, you would have somebody in a rig that is 19 # negative, at the start, carrying 13 # on a belt, with a suit that could lose 24 # at depth, using a 26 # wing. So, when they get to max depth, if the suit is a dry suit and has a total failure, they lose their 24 # of positive buoyancy. Or, if it's a thick wetsuit, they lose 24 # from suit compression at whatever depth they're at.

So, now that your example has the diver on the bottom and they are 32 # negative, with a 26 # wing, your answer is? Swim it up? What that's, diver? You're cold and your neck seal blowout caused you to drop another 10' of depth before you got control of the situation, and now your leg has a cramp from the cold and the stress, so you can't kick very well? Sorry, buddy, Tobin never recommends ditching weight, so you're just going to have to get over your minor little issues and swim. Swim, damn you!! It's so lucky for you that you have that smaller wing, so you have less drag to hinder you swimming your rig up.

I am not going to bother linking to other posts from you that say that, in unusual circumstances (which is what we're talking about here, right?) you did actually post that the diver *might* need to drop their weights.

I also won't bother to link to your numerous posts where you wrote that, if the weight isn't ditchable (e.g. it's bolted to the BP so it's not ditchable), they need a bigger wing. If the weight being non-ditchable means you need a bigger wing, then what does that say about using a smaller wing because the weight IS ditchable? It seems to me that the answer is "you might have to ditch it", even if you didn't explicitly say it in that same post.

The point is (and was, in my earlier post) that you have posted numerous times the wing only needs to be big enough to float the rig, and if the ballast is on the rig, then that means they need a bigger wing. Carrying ballast on a belt means it is not allowed for in the wing lift calculation you have posted numerous times. Thus, if a diver blindly follows your suggestion, but it turns out that the diver would prefer to have a plan that does not require dropping their ballast and losing it (in a worst-case scenario) your advice is going to have them buying a wing that is smaller than what they would buy (if things were fully explained). And I have never seen a post from you on this subject that makes that clear to the person you're talking to.

Further, some divers may start out with their ballast on a belt. Let's say that the diver ends up needing 8 # of ballast on their belt for their normal diving. They took your advice and bought a wing that is based on the weight of their rig, which does not include that 8#. Now, the diver has gotten some experience and feels comfortable with their weighting and decides to buy your 8# bolt-on weights and attach them to their BP, so that they don't have to mess with a belt.

They've read so many posts on SB about how knowledgeable, properly weighted divers never need to ditch weight that they feel comfortable changing from 8 # of ditchable to the same overall weight, but none of it ditchable.

Now, since they have been and are following your advice, they need to buy a new wing that has 8# more lift? Who did your advice really help there? The diver? Or the person selling wings?

---------- Post added August 28th, 2015 at 10:07 AM ----------

Just a word of caution, DGX or DiveRite Travel wing is a lousy wing for STAless usage. There is no build-in tank stabilizer. Center opening is too wide. IMO, the best STAless setup is DSS. You can take the wing off without remove tank bands. It make traveling very convinent. Wing has nice build instablizer. The 2nd best wing for STA less setup IMO is Oxycheq MkV. Very narrow center opening, nice build in tank stabilizer.

If OP don't mind STA vs STAless, also don't mind the flatness of the backplate, between DRIS Trianta package $379 vs DSS $450, the difference is only $70. I will recommend DSS. While they both function the same in practice, DSS is an overall better thought out package. You add weight plate later one if you need the ballast.

If you're going to go with an STA as part of the rig, DGX will add an STA to their $299 package for another $25. And upgrade it to stainless steel on the backplate for another $10. $334 for a complete rig...

And, yes, I can remove my DSS wing from my DSS BP without removing the tank bands, but, looking at the DGX rig, if I were using it without an STA, I could do the same thing, right?

And if I decided I wanted more tank stability, it looks like I could spend $15 on an OMS soft STA (instead of $25 on the DGX STA) and still be able to remove the wing without removing or unthreading the tank straps?

Soft Single Tank Adapter(STA) - OMSDive

My DSS backplate is a great piece of gear. I don't even have a single nit I would pick with it. But, my DSS wing, well, I guess I'm an inexperienced and clumsy dolt, but I have repaired 3 pinch flat holes in the bladder of my wing in the 9 months that I have owned it. Put me on a pitching dive boat and ask me to change tanks on my BC and I guess you better watch out! My wing is the horseshoe shape and I feel like I would like to switch to a donut. But, the DSS donut wings (the Torus line) do not give access to the inner bladder, so I would not be able to do a quick repair in the field if I got a pinch flat in that. Thus, when I eventually do get another single tank wing, as much as I like my DSS backplate, I will be getting a different brand of wing. Currently, I'm really looking at the DGX (Dive Rite) setup or possibly a Hog wing. I will probably end up trying the DGX wing because I haven't seen any other option that is less expensive, and DGX customer service is phenomenal.
 
Thus, I cannot provide you an example of why a properly weighted diver, with a properly sized wing, would ever need to drop ballast.

Progress.

I have posted many 100's of times on the subject of wing sizing. Many include the following weighting recommendation for divers using normal sized single cylinders and buoyant suits:

Adjust your initial weighting so you are eye level at the surface with no gas in your wing and full cylinder. I may not include this information depending on the application I'm being asked about because it can confuse those using less buoyant suits.

If one is weighted as described, and has BC that offers more lift than than the initial buoyancy of their suit and enough lift to float their rig if they ditch it, which is *exactly* what I have recommended for years there will be no need to ever drop ballast.

One does not gain mass during a dive, we loose mass as the gas is consumed.

Having said that lets looks at the example I offered on a *Technical* diving forum in 2008…..


How deep does one have to go to zero out a wetsuit?

Do you recommend diving to these depths with a single cylinder?

How likely is it that drysuit will lose 100% of it's initial buoyancy?

Were you not breathing *any* gas on the way to the bottom while your drysuit suffered a total failure?

Would you ditch your belt or swim up couple lbs?

The reality is my recommendations have built in fudge factors. This is intentional on my part because I know not every diver will follow my recommendations with rigor. The number of failures that would have to occur near simultaneously to leave ditching ballast as the only alternative are many. The number of failures divers realistically plan for is few. This should be part of your technical instruction.

I'd again suggest that you refrain from offering advice until you have some actual experience and training, but I know that's pointless.



Tobin
 
and his post leaves out one thing about actually ditching ballast that is often over looked. Ditching ballast is generally only recommended as an option for increasing comfort at the surface. I.e. you have a wing failure, you can barely float at the surface because you have a balanced rig, but if you have to be at the surface for a long time or have a swim back, ditching weight is better than ditching the rig. All assuming you're not sitting on top of something that is fragile and will be damaged by you dropping said weight belt. Diving a safe and balanced rig should never require ditching weight at depth, and because of that, should not be factored into your weight considerations....
 
https://www.shearwater.com/products/perdix-ai/

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