I've had a bad back ever since a joint of 60" ID concrete pipe landed on it, under 20' of black water. Not a good day, but a lot better than it could have been. At least I had Everglades muck under me and could get out from under it after about 2 hours of wiggle and freeze. I would have been a lot happier if I had been on surface supplied air. Stretching a 72 for that long was a serious exercise in zen diving! It's a long story, and needs adult beverages.
That injury and a couple others bother me occasonally. I've also been diving buddies to several people who have serious bad backs. The first thing to remember is that if you are weighted and trimmed correctly, gravity stops at the waterline. For an abused back this is a VERY good thing! More than one buddy has told me that the only time his back does not hurt is in the water!The trick is to not have the resumption of gravity get to you.
One simple technique is to splice a large clip into a 20' section of 1/2" minimum nylon 3-strand or braid, and splice a large 10 or 12" eye in the other end. Remember that knots are bulky and can slip, but a sewn splice is permanent and not likely to hang on ryour gear or the boat. SCUBA gear is expensive so take the time to learn how to do the splice! ALWAYS have this line in your bag.
When you get on the boat find out how the entries are done and attach that line to an outboard heavy cleat or stanchion adjacent to the entry point or ladder with the long eye, and put your gear as close to that point a practical. When gearing up put on exposure suit, MF&S and belt, but take your tank to the line. Clip off the gear through a suitable firm attachment point you can get to easily with the gear on (locked shoulder D-ring, BC handle, or purpose mounted short leash) and have someone with a real back toss the rig overboard.
When you enter just swim over to the gear, turn on the air again, and swim into it. When the dive is over swim over to the clip that will be trailing the entry point by several feet, and be about 10' down. Clip your gear off and THEN swim out of it. You may even want to put a D on your weight belt to clip it off too. The snorkel to the ladder is easy now, and you'll have no trouble getting up the ladder even in moderate seas. Once on the boat and otherwise degeared, then worry about who you are coing to con into hauling the gear OUT of the water. :mean: Even if you have to do the lifting you'll be able to deal with it properly braced with firm footing.
Each diver should have their own clip line, not multiple clips on the same line. BTDT. Worked very poorly. There is a hernia involved somewhere in the process of pulling multipe rigs out of the water on a single line.;-0
BTW The larger diameter line is a _lot_ easier on cold hands during the gear recovery than a small line.
FT