The Importance of a Balanced Rig - A true tale

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rlynch

Contributor
Scuba Instructor
Divemaster
Messages
451
Reaction score
61
Location
Apex NC
# of dives
500 - 999
Hi All,
This is a true story and the lesson learned for you is why you need to have a balanced Rig that you can Swim up to the surface.
This week My regular dive buddy and I did 5 dives over 2 days of Cape Hatteras NC on the “Under Pressure” with Capt. JT. I mention this because, it’s an awesome dive boat and operation and he has a diver lift which means no ladder to climb!
We were doing a “Class” on Friday but Thursday was normal fun dives, and JT had us do the tie in for both dives.
Our First dive went fine with some minor learning items for both of us. The Second dive was on the “Dixie Arrow” at 90 fsw. We planned a dive that was 25 minutes and minimal “time out” on the line up. JT set the hook, and we splashed right after to secure the hook to the wreck. Normal procedure is to drop in fast and get the boat secured, which we did. I typically do a giant stride over board, do an initial vent from my inflator and grab the lead line and then fully vent the wing from my butt dump. We raced to the bottom and did the tie in, while were wrapping the chain and doing the secondary tie in I started to have trouble getting neutral. I’m thinking WTF as I’m pounding gas into my wing and nothing is happening. I look at my inflator and its fine, no leaks there, gas is going into the wing. Finally I reach back to check my butt dump……. And It’s GONE, totally gone, just a hole where the dump valve use to live. I signal Joe, and let him know my wing is broken and that’s why I look like an OW student at the moment (we do this with hand signals pretty quick). The rest of the divers (not teams) are coming down the line.
Ok so my options are pretty limited at this point, Busted wing, no (actually low) buoyancy control. Time to head to the surface.....
Its at this point I’m thanking myself for choosing my LP85 doubles to go with my 5mm wetsuit (its usually 80 this time of year in NC top to bottom, and my drysuit gets hot after about 20 minutes with the xeotherms so I decided to dive wet). I specifically chose my LP85’s for this dive because I KNOW I can swim them up, I’ve tied it and done it with them in a controlled environment and I KNOW I can hold a stop with them.
I headed up the line, a bit stressed, but nowhere near what it could have been wearing my LP112’s, Hit the boat, stripped the valve from my lift bag (important note here is that all Halcyon dump valves are the same and interchangeable, something I did not think of till I was ½ way to the surface, I could have stripped a valve out of one of my 2 SMB’s at depth and carried on with the dive at that point, getting joe to screw it back on). Coming up the line was no problem and since I weight my rig to be only slightly negative with my exposure suit on (1/2 lb range when diving wet) staying afloat on the surface with only a kick or 2 was easy.
So people….
Mind your gear (my dumb valve must have worked loose or something on dive one, since I did check it at the start of the day as per normal, or I'm He-man and pulled it off, which is possible) & make sure you can positively, 100% of the time, SWIM up your RIG with no buoyancy. If you can’t, don’t dive it. Don’t let a $10 piece of plastic come between you and tomorrow.
Safe Diving…..not every dive goes as planned just make sure you can deal with it safely.
 
Be careful when you find the dump valve. If you use the "wrap your finger round the valve" technique make sure that you go clockwise as otherwise this can happen. Also in that situation if you move to a head up trim you can get quite a lot of gas in the wing for the ascent.
HTH
John
 
yep john, head up was reference to looking like an ow student since that is the only way the wing would hold gas. I normally reach back and touch the valve and then grab my thick string (I replaced the stock string with a thicker one). potentially what could have happened is that I inadvertently unscrewed it but my technique is pretty refined, to touch and go. either way it is now a pre-dive check (and not just once per day) to check that the valve is tight. good points.
 
Might be helpful, but I usually tie a Ashely Stopper Knot at the end of my OPV, rather than an overhand. It creates a 3 ridged knot that's easier to grab. And it that's not enough, I do a Figure 8 knot right near the OPV, that way I don't have to trace, or be inclined to yank hard on the end of the string.

Nicely handled btw. It's good to know that the Halcyon OPV's are all interchangeable.

Ashley (Oysterman's) Stopper Knot | How to tie the Ashley Stopper Knot (Oysterman's) Stopper Knot | Boating Knots
 
Good story. My friend Lamont had something similar happen to him, which is why, when we do the "dump valve" check in our buddy check, I always twist the cover to make sure it's tight.
 
Glad you are ok and were able to work through the issue.

Like Lynne, we also incorporate a dump valve screw-tension check into our GUE EDGE before every dive (as vanishing caps appear a somewhat common problem).

We were able to save one dive when a partners wing dump valve cap fell off and was lost, because the screw-on caps on both the Halcyon SMB and wing are interchangeable.
 
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... stripped the valve from my lift bag (important note here is that all Halcyon dump valves are the same and interchangeable, something I did not think of till I was ½ way to the surface, I could have stripped a valve out of one of my 2 SMB’s at depth and carried on with the dive at that point

Nice thinking. If you have time/buoyancy/support to do the replacement, then it can save the dive, or at least, make your ascent safer and less demanding.

Will remember that.
 
Might be helpful, but I usually tie a Ashely Stopper Knot at the end of my OPV, rather than an overhand. It creates a 3 ridged knot that's easier to grab. And it that's not enough, I do a Figure 8 knot right near the OPV, that way I don't have to trace, or be inclined to yank hard on the end of the string.

Nicely handled btw. It's good to know that the Halcyon OPV's are all interchangeable.

Ashley (Oysterman's) Stopper Knot | How to tie the Ashley Stopper Knot (Oysterman's) Stopper Knot | Boating Knots

I don't use that knots because I could have once an accident (not serious but ..), when we hurry out from boat and I have jammed valve cord behind bottle strap (single bottle).

Valve stay opened and instantly when jumping from boat to water I could not fill a wing , become heavy , and I have slowly sink .

Whitout knot I could extract cord and relase rear valve to close. If I have knot that could be problem ( or I have to wait buddy to cut the cord)

To grip cord easier I switch rear thinner cord with thicker 4mm ( later I have noticed somewhere that this is called ''swedish rear dump valve mod '')

http://dir-diver.com/en/equipment/dumpvalve_mod.html
 
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This happened to a GUE instructor on one of my fundies checkout dives. Thankfully, it was a shore dive and the OPV was found and screwed back in quickly. Since then, I always check that the thing is present, dumps, AND is screwed all the way in.
 
It shouldn't be that hard to orient yourself so the dump valve is at the bottom and your wing can still hold a lot of air, I'd think.
 

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