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decompression

Instructor...seriously...
Scuba Instructor
Messages
4,216
Reaction score
1,779
Location
Victoria, BC, Canada
# of dives
5000 - ∞
Does anybody know what deco algorithm is used on the Edge? Better yet, does anybody have a table of the NDLs for clean 1st dive? This information would be absolutely fascinating. Maybe @100days-a-year ?
 
Very interesting, found the manual online https://www.divetable.info/skripte/Orca_EDGE.pdf Uses a 12 tissue modified Haldanean model modified with M-values affected by Doppler venous gas bubble analysis. Sounds a lot like DSAT, doesn't it? In general, the Orca Edge was just a little more conservative than DSAT. No idea how it handled repetitive dives.
upload_2018-4-16_17-52-22.png
 
Are we talking about the same computer? I still have mine and it uses a standard alkaline 9 volt.

Back in the day (long before I knew better), it was not unusual for me to make 4 deco dives in a day on air, using my Edge. Granted, they were pretty light deco dives, but still 125' ish dives, going 5 min or so into deco on the Edge. I eventually got bent doing that. The repetitive dive profiles on the edge, particularly into dives 3 & 4 were quite liberal.
 
@scubadada, interesting, it looks like they tweaked later versions. I'm pretty sure that my edge gave me 7 min at 130'. on a clean first dive. Also, you didn't need to stay out of the water more than about 90 min before you were given nearly the same profiles. Like I said, the subsequent dive profiles were quite liberal.
 
I donated mine- a very early one- to a local shop's museum years ago. It used a standard 9 volt battery- what those of us old enough to remember called "transistor radio batteries", back when transistor radios were the height of personal electronics technology.
 
For fun, I took my edge with me on a dive a couple of years ago with my Perdix. I sent the picture to Shearwater and they got a kick out of it!
Edge meets perdix.JPG
 
https://www.shearwater.com/products/swift/

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