"Most"
People do tox at 1.6, especially when combined with exercise and CO2. They almost always lose their regulator and drown. In the military a 0.1% death rate might be considered mission acceptable risk. Recreationally its not ok to have 1/1000 divers die. So the recreational limits are set at 1.4, where virtually no one convulses (but it has still happened just exceptionally rare)
You dont really get that much NDL value out of a small amount of extra O2. If you want to stay longer you can do staged deco
People do tox at 1.6, especially when combined with exercise and CO2. They almost always lose their regulator and drown. In the military a 0.1% death rate might be considered mission acceptable risk. Recreationally its not ok to have 1/1000 divers die. So the recreational limits are set at 1.4, where virtually no one convulses (but it has still happened just exceptionally rare)
You dont really get that much NDL value out of a small amount of extra O2. If you want to stay longer you can do staged deco