surface interval? we don need no stinking surface interval...
cute story, was on a boat in BC, divers choice, just came back from a hour or so dive down to 140ish on the Cape breton, sitting in the settee sipping soup and a numpty chick gets back on the boat whining that she lost her weight belt and the shop owner she rented it from was going to charge her $150 for replacement and would any of yalll kind divers go get it for her. "I'll pay you $75 if you can find it and bring it back" My buddy Scott and I looked at each other for about .5 seconds and went "OK!" we had been out of the water about 10 minutes and strapped on the trusty CCR's and splashed again to the keel of the boat at 140, (judging from the wind, and where we were tied up, we figured the belt missed the boat and landed in the sand behind it )spent another 20 min on the bottom looking around the fantail of the ship. finally gave up and headed back up to the line, when i saw the belt hanging half on, half off the flight operations deck, bagged it, swam it over to the line and started up, 7 min of deco on the clock, hardly worth waiting for... There REALLY is an advantage to CCR and constant PO2 diving. I wonder if some really smart deco professor could do a spreadsheet on depth's, time and constant PO2 vs Fo2 diving.
never got the 75, the beach renigged on the deal, but did give me a smooch on the cheek, hardly worth the effort, but I did get 3 dives that day instead of 2. hehehe