Quote: (Originally Posted by
Meng_Tze)
Supposing you can not read a HUD in zero vis, having a bailout table is also useless? Anything requiring visual reference is useless.......
There would be a physical obstruction between your eyes and the outside world for one not to see anything (true zero vis). Not even the glow of the HUD/lights and such would be seen. This I do not think is a realistic scenario.
Ok, tell you what i'm going to do, I'll take an extra face mask with me on my next dive and un-clip the shearwater HUD and hold it up to the mask as I press it into the mud. I'll take a picture from the other side of the glass and post it. If I can't get a photo with the HUD clearly visible, I'll concede that there is such a potential for true zero vis "as if eyes closed" scenario. And I'll keep doing what i've been doing... adjust my practices accordingly to to reflect the level of risk i'm comfortable with. Actually, maybe making up some split pea soup would be easier...;-).
Relying entirely on a setp point controller or entirely on a HUD and manual injection are both high risk scenarios, IMHO.
g