EdMcNeill09
Registered
Pre dive on Avelo you enter the water with "swimmer's buoyancy". Like entering a swimming pool as a swimmer you will ideally be just a pound or two positive. Like a swimmer it is easy to swim down. Running the pump once adds 2lbs of water to the tank resulting in a very comfortable -1lb buoyancy. At the end of the dive you are more buoyant as you release the water added during the dive. But you're not as buoyant as you would be with a fully inflated wing. Avelo does include an SMB that can be inflated for additional buoyancy and can be worn as a horse collar with attachments at your hip d-rings.@EdMcNeill09 - thanks for that.
Do you wear a normal wing/bcd for use on the surface pre and post dive? Would consider this as safety critical, especially if helping someone in trouble, or with a bag of scallops.
For me, correct weighting is a critical skill for every diver. On a recent Caribbean trip I used the first couple of dives to precisely dial in my weight, requiring exactly 4 lbs for total comfort in my aluminium backplate and wing rig with the rental ali80s. Thereafter it was blissful. The first dive with 2 lbs was slightly too light, but controllable even at the end of the dive using lung control.
Was astonished at the amount of weight some other divers were using on that same boat, most over 10 lbs, some using 16 lbs. Maybe that was the reason for seeing some people drop like a stone and finning frantically to stop whilst kicking up the bottom.
On my normal diving using a rebreather with multiple bailout cylinders I do not descend as quickly as some of those divers. Maybe that’s due to flat trim, but probably because they’re grossly overweighted — an indictment of poor skills and questionable training.
If you're bringing up a bag of scallops I hope you have a float to put them in. Definitely bringing up weights at the end of a dive is challenging on Avelo. But again you could also use an smb as a lift bag in a pinch.
Weighting on standard scuba is a matter of personal need for non professional divers. For professional divers it is important to be able to be negative at any point during a dive. For this reason a pro check is done at 15' with 500 psi in the tank an empty bcd and a full lung of air. If you're neutral it's all good. This means you can be negative easily. This results in needing more weight than if we're just trying to be neutral during our dives. For this reason I don't dive Avelo when I'm teaching Open Water to somebody learning on standard scuba. I can't quickly get negative if they panic and hit the inflator button or swim quickly to the surface. I couldn't slow them down. I'm looking forward to being able to teach Open Water with Avelo. It will be simpler.