Does a scooter count as 'redundant buoyancy'?

[happy-diver]

Yeah sealed bag with co2 cartridge

 

[bipolarbear]

Ditch the heavy tanks and you’ll be very close to neutral. Trimix is light, and a single tank of oxygen or 50% doesn’t weight much at all.

That's what I've always thought as well, although not an experiment I've been prepared to try at depth!

 

[Etmutt]

as far as i m concerned; yes i consider it is backup buoyancy.

i don’t see why it would be less valid as such vs any of the other methods and alternat that are mentioned above. the scoot can fail ; but so does any of the other backup method. in open water a scoot is very effective at bringing you up even you are heavy.

regarding your experienced tech instructor ; he sound very much like a show off guru. diving in dry in warm water because of “backup buoyancy”? get a lift bag already! and then trying to preach to the whole boat out of nowhere ? get a life! seriously though having done thousands of dive does not necessarily teach critical thinking

 

[Gone for diving]

Yeah sealed bag with co2 cartridge

I have mounted and old horsecoller co2 assembly in a lift bag.
I have a cartridge that can be filled with shop air and is easily refillable.... aliexpress sells them

 

[PfcAJ]

That's what I've always thought as well, although not an experiment I've been prepared to try at depth!

Hand em off to a buddy and see how it feels.

 

[NothingClever]

This thread is just crazy.

 

[happy-diver]

I have mounted and old horsecoller co2 assembly in a lift bag.

although I have a couple of manufactured ones, this is exactly what I am talking about chief.

 

[lermontov]

Utilising a scooter as an emergency is legitimate- If you doing wreck dives at depth then usually you have a shot line? I always us the shot line to ascend by hand over hand- i find it much easier to control ascent rates and I just use the ascent bar graph on my Nerd to measure speed

I prefer a dry suit for long dives - its always reassuring to have a second option to the wing, add in 2 smbs a shot line ditchable weights and a scooter and I think youve got it covered

blowing a wing on descent is the problem you alluded to though - definitely a scarier outcome with a wet suit-your not going to have time to get an smb out so your down to the ditching weights or using the scooter -which can be done by slowly circling around and ascending

 

[Sascha314]

In a drysuit you can establish easily neutral buyoncy at a given depth - well if you are not over or undweighted of course. And it is trained.

That gives you a far easier handling. Handling with a scooter or liftbag (how easy can you release air from that? An smb at least may have a release valve) Not sure if you want to have that additonal workload in case of an emergency scenario... so a dry suit is certainly a good thing.

Well but you may consider the risk of a wing failure, and take this into account if you sre fine with your backup solution. Lots of these thoughts come from dir thinking, where you penetrate a cave or wreck -> possibility to damage your wing is much higher, as if you are just in open water.

I would not consider these in my plan, butnof course in emergency use that. Vote for dry suit, as I try to minimize risks.

 

[Manatee Diver]

liftbag (how easy can you release air from that? An smb at least may have a release valve)

If you are thinking about using a lift bag as a redundant source of buoyancy you need one with a dump valve. Like the Dive Rite one that runs the release cord down to the bottom.

That being said, lift bags are suboptimal.