The idea that it'll just all be fine if you go into deco because your computer will sort it out is quite dangerous.
...
Getting a recreational computer and assuming that it will get you out of deco trouble is a surefire way to look like a pretzel.
I'm skeptical. Can you offer any examples (or other data to support your statements) where someone followed the deco prescribed by a Rec computer and got bent like a pretzel?
I'm more inclined to think that the reasons not to use a Rec computer for deco are:
- you can't control the algorithm like you can with a tech computer, and it will (probably, but who really knows) act more conservatively and give you more deco and less NDL on repetitive dives. The posts I've read about certain computers "penalizing" you for things seems to suggest this.
- you might not be able to do a gas switch in the water (depends on the Rec computer), so it would only be good for deco on back gas
- it might not support gases with higher than 40% O2. So, not very useful for real deco diving.
- it won't calculate a TTS for you, based on the gases you're carrying (which is simply an inconvenience).
- many Rec computers will lock you out of Dive mode for 24 or 48 hours if you omit required deco stops.
I know all the Rec computers' manuals tell you not to use them for deco diving. But, they all will give you a staged deco ascent plan if you do exceed your NDL. So, what is the data you are aware of that supports the suggestion that following a Rec computer's deco plan is "a surefire way to look like a pretzel"? If that were true, it sounds like a surefire way for a computer manufacturer to get sued for a lot of money and lose.