Nothing on you Mark, but you can breath for quite a while at 10' on 200psi. Was the person panacking or something? I had to do the same thing for a diver on the anchor line last year. I guess some regs don't breath that great with only 200psi.
Mark Vlahos:Hi,
I have donated the long hose one time and it was a low on air dive. The other diver was low enough on air that he was going to limit his safety stop to about 30 seconds so he could make the surface with about 200 PSI in his tank. I volunteered my regulator allowing him to take a nice long 3 minute stop. He was in no immediate danger of running out of air and if I had not donated he would have made the surface safely and was not anywhere near his NDL for that dive. He had been getting good bottom times on earlier dives but was having some trouble with bouyancy on this dive and blew through the air at a rate that for him was out of character. The long hose allowed him to not feel closed in while we shared my tank.
When we got to the surface he expressed surprise at just how easy it was to breathe from my tank with the 7' hose. The long hose allowed me to fill a lift bag without being too close to him. Really made things easy. When we made the surface he was calm and relaxed.
Mark Vlahos