ShoalDiverSA
Contributor
Hi,
I watched the movie The Cave a few nights ago, and the obvious voice-overs during the diving sequences got me thinking.
They are diving with rebreathers, but the fact that they have mouthpieces precludes them from using a (standard) electronic communications system. This is surely also the case where rebreathers are used for expedition dives similar to this.
One solution seems to be to attach a FFM to a rebreather(?). I was wondering whether this has been tried in the past, or if it is not even theoretically viable due to safety or practical concerns? Is this option merely excluded as it creates further possible failure modes?
One of the concerns may be the flow characteristics of the air through the mask leading to poor/unpredictable recycling of air through the breathing loop. Another may be that the loss of a FFM versus a conventional mask would result in water ingress into the breathing loop.
Other than a FFM, what other techniques are used during expedition dives on rebreathers for communication (other than hand signals)?
I was just wondering about this, came up with nothing through the search feature, and thought I would put it to the rebreather gurus!
Cheers,
Andrew
I watched the movie The Cave a few nights ago, and the obvious voice-overs during the diving sequences got me thinking.
They are diving with rebreathers, but the fact that they have mouthpieces precludes them from using a (standard) electronic communications system. This is surely also the case where rebreathers are used for expedition dives similar to this.
One solution seems to be to attach a FFM to a rebreather(?). I was wondering whether this has been tried in the past, or if it is not even theoretically viable due to safety or practical concerns? Is this option merely excluded as it creates further possible failure modes?
One of the concerns may be the flow characteristics of the air through the mask leading to poor/unpredictable recycling of air through the breathing loop. Another may be that the loss of a FFM versus a conventional mask would result in water ingress into the breathing loop.
Other than a FFM, what other techniques are used during expedition dives on rebreathers for communication (other than hand signals)?
I was just wondering about this, came up with nothing through the search feature, and thought I would put it to the rebreather gurus!
Cheers,
Andrew