As an FYI the current in the St. Lawrence near the Jodrey runs like this mid-channel.
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miketsp:How much deco did his computer require?
DiverBuoy:I'm sure you were just being funny, but besides any issue of battery life of 25 years, he didn't have one in 1981.
Courtneyf82:I guess Im just spoiled by where I live, but fresh water really doesnt appeal to me at all, of course if I lived in the midwest or something, I would probably be all about the river, all the free refrigerators and trash you can handle.
miketsp:Yes of course battery life would be the issue however in 81 there were already some electronic computers around.
I believe the Hans Hass DecoBrain and Orca Edge date from 79, with full production in the early 80s.
See some pictures here:
http://www.divetable.de/museum_g.htm
We had something similar with a friend of ours that lost her Mosquito while doing a wreck dive with us at 36m. Anyway we dived the same site the following day and the boat owner found it in one of the corridors. Needless to say it was totally saturated after 24 hours at 36m and requiring a ridiculous deco stop.
DiverBuoy:First that link is broken.
Second Orca dive computers were not available until after his dive in 1981.
Third the Hans Hass was in commerical dive use only and had depth restrictions which would not have made it practical for this dive profile.
Bottom line is 25 years ago this guy would not have had a recreational dive computer, by any stretch.