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- I just don't log dives
Imagine this:
You are diving a deep wall off Cayman in a 3mm wetsuit with double AL80's. Your wing fails at the threads between the inflation hose and the bladder making maintaining bouyancy with the wing virtually impossible. Any air added just easily escapes out as you add it.
You tilt slightly head down so the air stays in the bottom of the bc where the leak isn't, relax and do a normal ascent.
First, my spool is always attached to my bag, and there's nothing to tangle. I don't use a reel with a lift bag because it can foul.All this is happening while you are kicking feverishly to maintain depth due to being negative from the doubles fairly early in the dive. You are sinking against the kick initially at a rate of 30 feet per minute as you deploy your bag. Instead of clipping the snapbolt to your crotch d-ring, you decide to attach it to your reel and blow it to the surface. The bag rises above you and the line jumps the spool, tangling with the force of 50lbs pulling against your mass.
Second, nothing that's attached to the outside world (filled bags, lines, whatever) ever gets attached to me.
In any case, I can pull out the other bag and spool and deploy it.
No1. Go for a ride and get bent?
My buddy already cut the line. If I have a bag and a spool out, he's got a cutting tool.2. Cut the line/let go of the reel, and start your descent into the abyss?
Actually yes. I always bring two of each.3. Did you bring a backup bag and reel to replace the primary in such an event?
You're welcome to do this, but I prefer to have the bag on the surface and just roll up the spool as necessary. It's much easier to move up a foot by rolling up a foot of line than by riding a floppy half-inflated bag.None of these are good options in this scenario, which is not fantasy. The appropriate way to use a lift bag to control bouyancy is to handle it the same way you would your other forms of bouyancy. Keep it close to the body so you are in control at all times. A proper 50lb lift bag will have a stainless steel snap bolt at the bottom of the lifting strap. You clip it to the crotch d-ring, add enough gas to it to stop the descent, then gather your wits. At this point, you will not need to add any more gas to the bag, as Boyle's Law will take care of the rest. You slowly give a few kicks to rise just a few feet in the water column, just as you would if you still had use of your wing; all while keeping the bag close to your chest, anchored at the crotch d-ring, and one hand stabilizing the top of the bag and the other hand on the OPRV at the top of the bag. As you rise a few feet, you burp the OPRV, and repeat with a few kicks.
In fact, this whole scenario is a little contrived, since you would need to have a bunch of dumb things in sequence to get to the point that you're going to "ride the lift-bag pony".
What would really happen is that I would reach over and grab my buddy, who would adjust his buoyancy to stop our descent. I would point at my BC, extend my middle finger to indicate that it failed, and we would do a normal ascent to the surface.
In any event, this can be avoided by not doing dumb things.
I won't dive in any configuration that can become negatively buoyant, without redundant buoyancy. That means that steel doubles = wing and drysuit. And my buddy who would happily grab me and haul my butt back to the surface if necessary.
This is any easy task with practice. I've had to do it for another reason I will explain in another post if anyone wants to hear it. Shooting the bag to the surface and reeling yourself up is not an option. Try it, and you will see that you are not going to be able to turn the spool against all that mass, even while kicking your heart out. You will very quickly tire. You need the gas in the bag to lift you, not your arms and fingers on a tiny line and spindle.
Actually, I've done it and works just fine. Mountain climbers haul their entire body weight up thousands of feet. We're only talking about 20 pounds.
Terry