K9Diver

Tek - Dogs do detect Human scent from the water-They detect the rafts (Dead skin cells) that rise with the currents to the top and end up in the air. We are trying to remove the bubbles all together, a well trained K-9 will learn that bubbles equal diver equal toy equal Play time. Currently we use homemade devices that reproduce a breathing diver, bubbles look the same. But with technology today we can remove that wasted effort.

Niels -
I don't think a O2 will be good for us due to the depth -- on the advanced Dogs we tend to work at 20'-25 'depths, sometimes due to current we hit the bottom and might be there for 15-45 min depending on the scenario of training.
The SCR, we actually looked at a Dragger ray (I believe) in a pool and the bubbles are less then OCS but we (Divers) voted against the unit because of the bubbles.
I haven't as yet looked seriously at the Kiss but I shall, Really been looking at the Optima and not sure why.
Currently we are trying to get our Board of Directors to fund a small class-Rebreather experience to try the Optima and the Inspiration. The class is more like a Here they are what they do try in the pool class no Cert. But if you ever Worked with a BOD then you know the pain.
We actually have some CCR divers to help, not as often as we would like but they try to get out 1 or 2 times a year. and that's not really enough.

K-9 Training - Younger dogs- Less advanced - We do more pop ups with them -Wave the toy and go under 2-3' - wait for a bark or a noise (squeek-wine anything) pop up and play - repeat those steps
Older - Advanced Dogs-For the most part you are down - 4' - 25' depending on current and scenario and your waiting for an indication, dog bark if you can hear it (OCS is Loud and up to the top for the reward (Play) Down time could be 10 min to 45 min.
The above is realy a short version of training but its to the point

Thank you both
K-9 Diver
PS, May you never need my Dog, Dive Safe