SF Tech "DIR"

[conallmeehan44]

Hello everyone, just wanted to ask whether the SF Tech TNT pro drysuit crushes due to the fact that it is a combination of neoprene. I am asking from a "dir" balanced rig question, whether the buoyancy of the drysuit is still neutral no matter the depth. And I have heard some people mention that it is really smooth to dump gas in the SF Tech, is this true? and if so what valves did you buy? Thanks everyone.

 

[steinbil]

A drysuit is not balanced on its own, nor is it supposed to be. You can alter the buoyancy by inflating/deflating the suit, and it therefore counts as redundant buoyancy.

The idea of a balanced rig is to:
a) be able to hold a 3m/10ft stop with near empty tanks AND
b) be able to get to the surface in case of a wing failure

For a wetsuit it's important to consider the loss of buoyancy of the material at depth, which is why thick wetsuits and deeper dives can't be balanced. Tech divers or cold water divers with drysuits and heavy steel tanks can only achieve this by redundant buoyancy.

 

[Olsen_No]

A drysuit is not balanced on its own, nor is it supposed to be. You can alter the buoyancy by inflating/deflating the suit, and it therefore counts as redundant buoyancy.

The idea of a balanced rig is to:
a) be able to hold a 3m/10ft stop with near empty tanks AND
b) be able to get to the surface in case of a wing failure

For a wetsuit it's important to consider the loss of buoyancy of the material at depth, which is why thick wetsuits and deeper dives can't be balanced. Tech divers or cold water divers with drysuits and heavy steel tanks can only achieve this by redundant buoyancy.

This

 

[conallmeehan44]

A drysuit is not balanced on its own, nor is it supposed to be. You can alter the buoyancy by inflating/deflating the suit, and it therefore counts as redundant buoyancy.

The idea of a balanced rig is to:
a) be able to hold a 3m/10ft stop with near empty tanks AND
b) be able to get to the surface in case of a wing failure

For a wetsuit it's important to consider the loss of buoyancy of the material at depth, which is why thick wetsuits and deeper dives can't be balanced. Tech divers or cold water divers with drysuits and heavy steel tanks can only achieve this by redundant buoyancy.

Sorry my mistake, I thought that with a balanced rig and a trilaminate drysuit that doesn’t get crushed, in a recreational situation you could fin or just use your breathing to ascend.

 

[Olsen_No]

Sorry my mistake, I thought that with a balanced rig and a trilaminate drysuit that doesn’t get crushed, in a recreational situation you could fin or just use your breathing to ascend.

one component is also how much undergarments and layers you have under?

If this is cold water and you have a lot of layers this balance is very hard to keep and often you will need to have some amount of droppable weight to be able to ascend from 30 meters with full tanks without over working yourself

 

[inquis]

If this is cold water and you have a lot of layers this balance is very hard to keep and often you will need to have some amount of droppable weight to be able to ascend from 30 meters with full tanks without over working yourself

To clarify for the OP, this is talking about the case when you have lost the wing AND had a major suit flood. In the more likely scenario, there is only one failure, and you can use the other to compensate.

 

[Olsen_No]

To clarify for the OP, this is talking about the case when you have lost the wing AND had a major suit flood. In the more likely scenario, there is only one failure, and you can use the other to compensate.

Thanks for pointing out this; this is exactly what I meant - assumption being the mother of failures and so forth