How close do you get to your gas MOD's?

[TrimixToo]

You must have been reading Scubaboard.
1.4 is the normal limit for the bottom phase of a dive. People on here talk about using 1.6 but they are the deviants busy normalising their behaviour for the people that take them seriously. 1.4 is not extra conservative.

Mostly, people who have accidents diving have not followed their training. By and large following your training and diving within the limits of training is very effective at keeping safe. Forums and FB are full of people prepared to second guess that training.

Somewhere in between the first time I took a Nitrox course and several years ago, the standards changed. 1.6 was thought safe for a bottom PPO2 for a while, and TDI, IIRC, called it "the best mix." People who have not kept up might not realize the standards have changed the max PP02 to 1.4 for bottom and working phases of a dive. I've certainly dialed mine back over the years. My max PP02 on Saturday was 1.21 for working on the bottom at 190' for 30 minutes, which I thought was sufficiently conservative.